A-1 Miller's Performance Enterprises Online Catalog

Small Engine Parts, Lawn & Garden Engines, Competition Garden Tractor Pulling Engines, Header Pipe Kits and Machine Shop Services


FOR SALE - Professionally Built Self-Propelled Pulling Sled for ATVs/UTVs, Garden Tractors & 1,500 lb. Small Wheel Mini Rods w/26-12.00x12 tires. Go here for information, YouTube videos and more pictures of this sled: HRGTPA.com. $15,000.00 or best offer. If interested, contact Brian Miller at 573-881-7229 (cell; text or voice mail) or email: pullingtractor@aol.com. We're planning to move up to bigger pulling entertainment.

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Governor Springs, Linkages, Throttle Cable Clamps, Throttle Cable Assemblies and Universal High Quality Foot/Gas Pedal Kit

Internal Engine Rebuild Parts (Gaskets, Oil Seals, Pistons and Rings, Connecting Rods, Rod & Main Bearings, Valves and Guides, OEM Kohler Cylinder Heads

Exhaust Header Pipes, Flanges and Kits

Valves, Oversize Valves, Valve Springs and Performance Camshafts

OEM Kohler Cast Aluminum and Cast Iron Oil Pans

Solid Motor Mounts for Cub Cadet "Quiet Line" Garden Tractors

Machine Shop Services

A-1 Miller's Stock Lawn & Garden, Recreational Vehicle/Early Snowmobile Engine Rebuilding, Custom Engine Build-up Services

A-1 Miller's Competition Pulling Engine Building and Pulling Engine Freshening Service

A-1 Miller's Engine Dyno (Dynamometer) Service (Test Horsepower and Torque)

If you would like to purchase any of the parts or services listed in this website, and/or for FREE professional and honest technical assistance and support, please contact: A-1 Miller's Performance Enterprises | 1501 W. Old Plank Rd. | Columbia, MO (Missouri) 65203-9136 USA | Phone: 1-573-256-0313 (shop) | 1-573-881-7229 (cell; text or when leaving a voice message, please speak slowly and clearly). Please call Monday-Friday, except holidays, 9am to 5pm, Central time zone. If no answer, please try again later. (When speaking with Brian, please be patient because I stutter.) E-mail: pullingtractor@aol.com. When you call, text, email or visit our shop, you will be dealing directly with the owner for the best customer service. A-1 Miller's shop is open to the public from 9am to 5pm, including weekends, except holidays. Please call before coming so I'll be here waiting for your arrival. Directions to our shop | 1501 West Old Plank Road, Columbia, MO - Google Maps or Map of 1501 West Old Plank Road, Columbia, MO by MapQuest. If you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's shop to personally drop off and/or pick up your carburetor, clutch assembly, engine, transaxle, tractor, etc. "The road to a friend's house (or shop) is never long." (We're planning to relocate to other property with a bigger and better shop so we can provide many more high quality parts and professional services.)


Governor Springs, Linkages, Throttle Cable Clamps, Throttle Cable Assemblies and Universal High Quality Foot/Gas Pedal Kit - [Top of Page]
Throttle Stabilizer/Anti-Surge Springs. Lightweight spring connects between throttle and governor levers to remove free play (looseness) in linkage connections and reduce erratic engine behavior due to throttle flutter for a smoother running engine and reduce wear to throttle shaft. Can be used on virtually any Briggs & Stratton, Kohler K-series, Magnum or Command single- or twin-cylinder cast iron or aluminum block engine. A must for a generator, welder or 4,000 RPM± governed competition pulling engine. With a governed pulling engine, throttle flutter causes the engine RPM to momentarily spike, which will cause the rear tires to lose traction (temporary jerk), resulting in a possible failed pull. If a small hole isn't already present in each lever close to linkage connection, may need to drill a small hole to install spring.
  • 2-7/16" overall length. High Quality Aftermarket Throttle Stabilizer/Anti-Surge Spring. $5.00 each, plus shipping & handling.
  • 2-1/8" overall length. OEM Kohler part # 230117-S. $8.23 each, plus shipping & handling.
  • 4-1/8" overall length. OEM Briggs & Stratton part #'s 260478, 690545. $9.00 each, plus shipping & handling.
V-Shaped/Coiled Governor Springs to regulate and maintain engine speed. Each has hook on each end. Not available in aftermarket. L
  • Designed for various Kohler engine models K141, K160/K161, K181 and M8 used for general lawn and garden use. OEM Kohler part # 232617-S. $7.20 each, plus shipping & handling.
  • Designed specifically for Kohler engine model K181 used with a generator. OEM Kohler part # 232619-S. $15.80 each, plus shipping & handling.
V-Shaped/Coiled Governor Spring to regulate and maintain engine speed. Designed for various Kohler engine models K181 and M8. Has hook on one end and "Z" bend on other end.
  • OEM Kohler part # 41 091 02-S. $21.91 each, plus shipping & handling. Not available in aftermarket. L
Governor Spring to regulate and maintain engine speed. Designed for newer Kohler engine model K181's with specification numbers 301000-301045, and various Kohler Magnum engine model M8's with specification numbers 301500-301651.
  • OEM Kohler part # 41 089 12-S. $7.60 each, plus shipping & handling. Not available in aftermarket. L
26 Coil Governor Spring to regulate and maintain engine speed. Designed for most Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Used in Cub Cadet models: 70, 71, 72, 73, 86, 100, 102, 104, 105, 106, 107, 108, 109, 122, 123, 124, 125, 126, 127, 128, 129, 149, 169, 1050, 1204, 1210 and 1211. Also can be used on various Kohler engine models KT17, KT17 Series II, KT19, KT19 Series II, M18 and M20. All these engines listed use the same governor gear assembly. 2-5/8" overall length (outside hook to outside hook). Replaces discontinued 23 coil short length governor spring, Kohler part # 45 091 01-S.
  • OEM Kohler part # 235496-S. $11.50 each, plus shipping & handling. Not available in aftermarket. L


26 Coil Extended Length Governor Spring to regulate and maintain engine speed. Designed for various Kohler K-series and Magnum engine models with the following specification numbers: K301-47766, K341-71207, 71209, 71232; M10-461504, 461505, 461512, 461513, 461526, 461530, 461531, 461532, 461539, 461542, 461543, 461546, 461551; M12-471504, 471505, 471506, 471507, 471553, 471554, 471555, 471569, 471571 471572, 471576, 471583, 471585, 471589; M14-601504, 601505, 601553; M16-711504, 711505, 711506, 711507, 711534, 711535, 711551, 711552, 711558, 711577, 711585. Used with an air compressor, concrete saw or sprayer. 5-5/8" overall length (outside hook to outside hook). Replaces discontinued 23 coil extended length governor spring, Kohler part # 47 089 07-S.
  • OEM Kohler part # 47 089 09-S. $6.25 each, plus shipping & handling. Not available in aftermarket. L


34 Coil Extended Length Governor Spring to regulate and maintain engine speed. Designed for Kohler K-series AQS (Quiet Line) and Magnum engine models with the following specification numbers: K241-46717, 46720, 46734, 46740, 46753, 46754, 46763, 46785; K301-47541, 47542, 47581, 47585, 47606, 47620, 47634, 47640, 47643, 47673, 47732, 47764, 47795, 47805; K321-60244, 60269, 60270, 60291, 60293, 60311, 60312, 60318, 60320, 60321, 60343, 60374, 60397, 60402, 60411, 60413, 60415; K341-71147, 71148, 71164, 71167, 71169, 71172 71176, 71198, 71203, 71221, 71222, 71227, 71242, 71243, 71270, 71275, 71338, 71355, 71356, 71366, 71369; M10-461509, 461521, 461533, M12-471514; 471516, 471527, 471528, 471536, 471538, 471545, 471546, 471549, 471580, 471581, 471584; M14-601513, 601524, 601525, 601528, 601534, 601538, 601540, 601542, 601558, 601559, 601561; M16-711513, 711514, 711521, 711523, 711527, 711528, 711529, 711532, 711536, 711537, 711539, 711544, 711546, 711555, 711560, 711562, 711563, 711568, 711570, 711575, 711576, 711580, 711593. Used in Cub Cadet models: 680, 1000, 1200, 1210, 1250, 1282, 1450, 1650, and John Deere AQS (Quiet Line) engines. Most common for general lawn and garden use. 8" overall length (outside hook to outside hook).
  • OEM Kohler part # 47 091 01-S. $13.25 each, plus shipping & handling. Not available in aftermarket. L
Throttle Linkages Ê | Top of Page
Nylon Bushing for throttle link used on Kohler engine models K181, M8, MV16, MV18, MV120 and certain aluminum block Kohler engines with 3/16" hole in governor and throttle levers. OEM Kohler part # 25 158 08-S. $1.49 each, plus shipping & handling. Not available in aftermarket. L
Nylon Bushings for throttle link used on Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with Carter or Kohler #26, #28, #30 or Walbro WHG #52, #60, #64 carburetors with 3/16" hole in governor lever and hole on throttle lever and without ball integrated with throttle lever. Each also fits certain aluminum block Kohler engines with 3/16" hole in governor and throttle levers. The two bushings below are identical except for the color. Not available in aftermarket. L
  • Black Bushing. OEM Kohler part # 25 158 11-S. $1.42 each, plus shipping & handling.
  • Translucent Bushing. OEM Kohler part # 47 158 07-S. $1.82 each, plus shipping & handling.
Throttle Link for Kohler flathead cast iron block K-series engine model K90/K91 with .080" hole in governor and throttle levers. 1-5/8" overall length. OEM Kohler part # 220380-S. $11.61 each, plus shipping & handling. Not available in aftermarket. L
Throttle Link for Kohler engine models K141, K160/K161, K181 and certain Magnum M8 with .080" hole in governor and throttle levers. 2-1/2" overall length. OEM Kohler part # 230078-S. $11.68 each, plus shipping & handling. Not available in aftermarket. L
Throttle Link for Kohler flathead cast iron block Magnum engine model M8 with 3/16" hole in governor and throttle levers. 2-1/2" overall length. OEM Kohler part # 25 079 01-S. $4.53 each, plus shipping & handling. Not available in aftermarket. L
New Style Throttle Link for Carter or Kohler and Walbro carburetors used on Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 flatheads, K361 with 3/16" hole in governor lever and ball on throttle lever. Fits Carter or Kohler #26, #28, #30 or Walbro WHG #52, #60, #64 carburetors without ball integrated with throttle lever. 2-3/4" overall length. Link. 2-7/8" overall length. OEM Kohler part # 47 079 11-S. $2.79 each, plus shipping & handling. Not available in aftermarket. L
New Style Throttle Linkage Kit for Kohler Magnum opposed (flathead) twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, M18 and M20 with 3/16" hole in governor and throttle levers. Includes two nylon bushings. Most commonly used linkage on these model engines.
  • OEM Kohler part # 52 079 11-S. $14.00 each, plus shipping & handling.
Throttle Linkage Push-On Retaining Nuts/Clips for Kohler engine models MV16, MV18, MV120 and certain aluminum block Kohler engines with .080" diameter throttle linkages. Discontinued from Kohler. Replaces Kohler part # 25 141 03-S. NOTE: These parts are very tiny. Use caution when handling.
  • $1.00 each, plus shipping & handling.
3/16" E-Clip (Retainer) for Early Style Throttle Rod (Linkage) used on Kohler engine models K241, K301, K330/K331, K321, K341 and K361 with early style throttle link/rod.
  • High quality aftermarket. .25¢ each, plus shipping & handling.
  • OEM Kohler part # 235278-S. $3.66 each, plus shipping & handling.
Early Style Throttle Rod (Linkage) for Kohler engine models K241, K301, K330/K331, K321, K341 and K361. OEM Kohler part # 235277-S.
  • Used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • New. $21.84 each, plus shipping & handling.
New 3/16" Throttle Ball Joint w/Integrated Ball/Threaded Stud for Kohler engine models K241, K301, K330/K331, K321, K341 and K361 with early style throttle link/rod. 10-32 UNF (fine thread) male and female threads. Fits Carter or Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors without ball integrated with throttle lever. Can also be used on mini rods, hot rods, race cars, etc. 10-32 UNF (fine thread) male and female threads. NOTE: Apply motor oil inside ball joint to reduce wear and for smoother throttle operation.
  • High quality aftermarket. $5.00 each, plus shipping & handling.
  • OEM Kohler part # 237130-S. $15.55 each, plus shipping & handling.
Early Style Throttle Quick Disconnect/Snap-On Ball Joint Body. Fits Carter or Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors with ball on throttle lever. Can also be used on mini rods, hot rods, race cars, etc. 10-32 UNF (fine thread) female threads and accepts 1/4" diameter ball. NOTE: Apply motor oil inside ball joint body to reduce wear and for smoother throttle operation. Discontinued from Kohler. L Replaces Kohler part # 45 208 03-S.
  • High quality aftermarket. $8.50 each, plus shipping & handling.
Throttle Ball w/Threaded Stud for Quick Disconnect/Snap-On Ball Joint Body above È used on Kohler engine models K241, K301, K321, K341 and K361. . Fits Carter or Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors with 3/16" hole in throttle lever. 1/4" diameter ball x 10-32 UNF (fine thread) threads. Includes nut and lock washer. Can also be used on mini rods, hot rods, race cars, etc. NOTE: Apply motor oil inside ball joint to reduce wear and for smoother throttle operation. Discontinued from Kohler. L Kohler part # 48 194 01-S. Replaced with Kohler part # 237130-S (ball joint w/integrated ball).
  • High quality aftermarket. $4.50 each, plus shipping & handling.
Quick Disconnect/Snap-On Throttle Ball Joint Assembly for Carter or Kohler and Walbro carburetors used on Kohler engine models K241, K301, K321, K341 and K361 with 3/16" hole in throttle lever. 10-32 UNF (fine thread) male and female threads. Fits Carter or Kohler #26, #28, #30 and Walbro WHG #52, #60, #64 carburetors without ball integrated with throttle lever. Can also be used on mini rods, hot rods, race cars, etc. NOTE: Apply motor oil inside ball joint body to reduce wear and for smoother throttle operation.
  • High quality aftermarket. $13.00 per assembly, plus shipping & handling.
Early Style Throttle Rod (Linkage) with Quick Disconnect/Snap-On Ball Joint and E-Clip Assembly for Kohler engine models K241, K301, K321, K341 and K361. Commonly used on K-series AQS (Quiet Line) engines. Assembled with Kohler part #'s 235277-S (rod), X-70-3 (nut), 45 208 03-S (ball joint body) and 235278-S (e-clip). Most parts discontinued from Kohler.
  • High quality aftermarket. $20.00 per assembly, plus shipping & handling.
Snap-On Throttle/Choke Cable Clip (Clamp). Use to secure throttle or choke cable conduit to extended OEM Kohler angled bracket on various Kohler engine models K141, K161, K181, K241, K301, K321, K341, M10, M12, M14, M16, K482, K532 and K582. OEM Kohler part # 235603-S. $4.80 each, plus shipping & handling.
Dual Conduit Throttle/Choke Cable Clamps. Can be used instead of clamp above for better security. Use to secure one or two 3/16" or 7/32" diameter cable conduit(s) to throttle or choke bracket. Each made of heavy gauge zinc-plated steel.
  • High quality aftermarket clamp only. Requires 3/16" mounting screw. Replaces Briggs and Stratton part #'s 22372 and 692179. $1.50 each, plus shipping & handling.
  • High quality aftermarket clamp with 3/16" screw, nut and split lock washer. Clamp replaces Briggs and Stratton part #'s 22372 and 692179. $2.00 each, plus shipping & handling.
  • Clamp only. Requires 3/16" mounting screw. OEM Briggs and Stratton part #'s 22372 and 692179. $3.00 each, plus shipping & handling.
Loop-Type Cable/Wire/Hose Clamps. Use to secure throttle or choke cables, or for safe routing of electrical wire(s), battery cable, small remote fuel primer hose or bundle of wires along frame. Each requires 3/16" mounting screw.
  • 3/16" Loop Size. Our part # 03-249. $1.00 each, plus shipping & handling.
  • 7/32" Loop Size. Our part # 03-2701. $1.00 each, plus shipping & handling.
  • Dual 7/32" Loop Size. Originally used for securing Kohler alternator wires to bearing plate. OEM Kohler part # X-728-1-S. $1.38 each, plus shipping & handling.
Solid Throttle Wire/Stranded Throttle Cable Swivel Kits. Use to secure solid throttle wire to speed control bracket for a stock/governed engine or to secure stranded throttle cable to throttle lever on carburetor for a competition pulling engine. Each kit includes wire swivel, screw and friction washer, and require a 15/64" / 6mm hole.
  • High quality aftermarket. Replaces Kohler part # 48 755 10-S. $3.00 per kit, plus shipping & handling.
  • OEM Kohler part # 48 755 10-S. $13.53 per kit, plus shipping & handling.
Speed Control Brackets. Each fits various 10-16hp Kohler engines, depending on application.
  • Bracket without adjustment yoke. OEM Kohler part # 235086-S. $4.25 each, plus shipping & handling.
  • Bracket with adjustment yoke. OEM Kohler part # 236413-S. $10.05 each, plus shipping & handling.
Universal-Fit Replacement Choke or Throttle Control Knob/Handle. Made of durable plastic. Replace missing knob/handle for more comfortable operation of the in-dash or panel-mounted choke or throttle cable control. Push-on or use small hammer to install.
  • $1.50 each, plus shipping & handling.
Lever-Action Solid Wire Remote Throttle Control Cable Assemblies. Side mount. Fits Cub Cadet models 70, 71, 72, 73, 100, 102, 104, 122, 123, 124, 125, 126, 127 and 147.
  • High quality aftermarket. All heavy duty metal construction. Very close to OEM. Inner wire length: 41-1/4"; Conduit length: 36-1/2"; Wire travel: 1-3/4".Our part # 8626. $29.00 each, plus shipping & handling.
  • OEM Cub Cadet part # IH-384883-R93. $51.00 each, plus shipping & handling.


Lever-Action Solid Wire Remote Throttle Control Cable Assemblies. Panel mount. Fits virtually all wide and spread frame Cub Cadet garden tractors Cub Cadet garden tractors Cub Cadet models 86, 108, 109, 128, 129, 149, 169, 800, 1000, 1100, 1200, 1250, 1450 and 1650.

  • High quality aftermarket. All heavy duty metal construction. Very close to OEM. Inner wire length: 28-7/8"; Conduit length: 26-7/8"; Wire travel: 1-3/4". Our part # 227. $29.00 each, plus shipping & handling.
  • OEM Cub Cadet part # IH-126465-C2. $41.55 each, plus shipping & handling.


Throttle Control Cable Assembly. Panel mount. Fits Cub Cadet models 582, 1050, 1204, 1210, 1211, 1282, 1710, 1712, 1806, 1810, 1811, 1812, 1872 and 2072.

  • OEM Cub Cadet part # 746-3002. $44.20 each, plus shipping & handling.
Push/Pull Solid Wire Remote Choke Control Cable Assemblies for all narrow frame Cub Cadet garden tractors.
  • High quality aftermarket. Durable plastic-coated metal conduit to resist rust. Very close to OEM. Inner wire length: 42-1/4"; Conduit length: 40-1/2"; Wire travel: 2". Our part # 72-1196. $20.00 each, plus shipping & handling.
  • OEM Cub Cadet part # IH-384884-R92. $44.00 each, plus shipping & handling.


Push/Pull Solid Wire Remote Choke Control Cable Assemblies for all wide and spread frame Cub Cadet garden tractors.

  • High quality aftermarket. Durable plastic-coated metal conduit to resist rust. Very close to OEM. Inner wire length: 35"; Conduit length: 43"; Wire travel: 1-1/2". Our part # 10748. $20.00 each, plus shipping & handling.
  • OEM Cub Cadet part # 946-3011. $35.75 each, plus shipping & handling.


Choke Control Cable Assembly. Fits Cub Cadet models 482, 682, 782, 784, 1710, 1711, 1712, 1806, 1810, 1811, 1812 and 2072. Not available in aftermarket.

  • OEM Cub Cadet part # 746-3001. $47.55 each, plus shipping & handling.


Choke Cable Control Assembly. Fits: 580, 582, 1604 and 1606. OEM Cub Cadet part # 746-3004. Discontinued from Cub Cadet and not available in aftermarket.

Universal High Quality Foot/Gas Pedal Kit. Includes 48" (commonly used) sliding stranded inner cable x 43" metal conduit housing and housing clamp. $35.00 each, plus shipping & handling.

Heavy Duty High Quality Replacement Throttle Control Cable Assemblies for Universal Foot/Gas Throttle Pedal Assembly.

  • 48" inner stranded wire cable x 43" metal conduit housing. $5.00 each, plus shipping & handling.
  • 53" inner stranded wire cable x 48" metal conduit housing. $5.00 each, plus shipping & handling.
  • 60" inner stranded wire cable x 55" metal conduit housing. $5.00 each, plus shipping & handling.
  • 100" inner stranded wire cable x 90" metal conduit housing. $7.50 each, plus shipping & handling.
Professional Foot Pedal-Operated Spring-Return Throttle Control Kits for governed Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 in Stock Competition Pulling Tractors, Go-Karts, Recreational Vehicles, Snowmobiles, King Midget micro cars (Kohler engines in King Midget cars originally come from the factory with no governor; governor components must be installed in engine for this kit to work), etc. If engine RPMs are set correctly (4,000±), this setup will prevent over-revving of the engine, which could cause connecting rod breakage and possibly damage or destroy the engine block. NOTE: Kohler AQS "Quiet Line" engines will need a different governor spring and lever for this kit to work. And hole in throttle swivel w/locking screw may need to be enlarged to 5/64" to accommodate inner stranded cable. An ingenious and innovative concept by Brian Miller. Please accept no advertised copycat product of this kind. (But I do appreciate them acknowledging my intelligence.)
  • Kit Without Control Cable. Includes: extension spring, extended bolt w/jam nut (to replace OEM cam gear cover bolt as shown in picture) and throttle cable clamp w/sheet metal screw (fastens on flywheel shroud). $7.00 each, plus shipping & handling.
  • Kit With Control Cable. Includes everything above, plus durable/high quality 43" outer metal housing/48" inner stranded wire control cable with loop on one end. $12.00 each, plus shipping & handling.

Tachometers, Governor Components, and Camshafts - [Top of Page] | Please contact A-1 Miller's if you're interested in any of these parts or services.
High Quality Inductive Handheld Small Engine Wireless Tachometer. A tachometer is required in setting the correct RPMs (normally 3,200 or 3,600 maximum for small engines) of an engine to prevent from over-revving and possible damage to the engine or dangerous flywheel explosion. Very accurate. For gas/spark ignite engines only. Works with magneto and battery-powered ignition systems. Very accurate. This handheld analog tachometer works great for checking/setting the RPM on various small engines in the shop, and/or for checking/setting the RPM [tech] on stock governed competition pulling engines. Hold sensor (antenna) close to spark plug wire for reading. Operates off a self-contained replaceable 9 volt battery. Has built-in battery voltage check. Reads up to 5,000 RPM on the low scale, and 15,000 RPM on the high scale.
  • $154.00 each, plus shipping & handling.
High Quality Inductive Small Engine Tachometer/Hour Meter. A tachometer is required in setting the correct RPMs (normally 3,200 or 3,600 maximum for small engines) of an engine to prevent over-revving and possible damage to the engine or dangerous flywheel explosion. Very accurate. Can be hand-held to temporarily set engine RPM or can be surface-mounted and secured with two screws. mounted to monitor engine RPM at all times. Large 3/8 inch LCD display. Works with all spark ignition engines by selecting engine type using S1 and S2 buttons. Works with magneto and battery-powered ignition systems. If tachometer does not turn on automatically as soon as engine starts, press and hold the two buttons at the same time. Instructions included. Tachometer reads up to 99,999 RPM. Hour meter reads up to 9999:59 hours/minutes then resets to Zero. Programmable maintenance hour setting with service icon, a reminder when to change oil or other service. Can be manually reset to Zero hours. Programmable maintenance hour setting with service icon, a reminder when to change oil or other service. Easy installation: Single wire wraps around spark plug wire and secured with two supplied nylon zip-ties. No wire terminal connections required. Dimensions: 2" wide x 1-3/4" depth x 3/4" height.
  • Inductive Small Engine Tachometer/Hour Meter with non-replaceable battery, rated up to 4 years. $20.00 each, plus shipping & handling.
  • Inductive Small Engine Tachometer/Hour Meter with replaceable CR2450 battery. $25.00 each, plus shipping & handling.
High Quality Digital Tachometer/Proximity Sensor Kits. A tachometer is required in setting the correct RPMs (normally 3,200 or 3,600 maximum for small engines) of an engine to prevent from over-revving and possible damage to the engine or dangerous flywheel explosion. Choice of a RED or BLUE numeric display. Will work with single- or twin-cylinder small engines or multi-cylinder automotive engines, gas or diesel. The great thing about this type of tachometer is it needs no setup. It displays accurate RPMs as soon as the engine cranks over to start. Displays up to 9,999 RPM. Very accurate. Tachometer returns to zero [0000] when engine is shut down. Operates totally independent of the ignition system. Can be used for lawn & garden equipment or competition pulling engines. Designed to be permanently mounted to monitor engine RPM at all times. Tachometer can be in-dash or panel-mounted. This precision digital tachometer operates with external power and on the same principle as my flywheel- or crank-trigger ignition systems with a proximity sensor to detect the target, which can be a small ferrous steel screw or pin, or magnet in a rotating disc on the crankshaft or on/in flywheel. A sturdy steel or aluminum bracket will need to be fabricated by customer to mount the sensor in close proximity of the detector/trigger target. Set air gap/clearance at .010"-.188". Tachometer works with 8-24 volts DC, proximity sensor works with 6-36 volts DC. Dimensions for mounting hole for tachometer: 3" wide x 1-17/32" wide. Tachometer measures 1" in depth. Dimensions of proximity sensor: 15/32" diameter x 1-3/8" thread length. Wiring Instructions: #1 wire on tachometer connects to brown wire on proximity sensor and ignition switch (12 volt power), #2 wire on tachometer connects to blue wire on proximity sensor and engine/chassis ground (battery negative (–) post), and #5 wire on tachometer connects to black wire on (either) proximity sensor. Wires #3 and #4 connects to nothing. Wiring is the same for the hall effect and inductive proximity sensors. Some proximity sensors have an LED (Light Emitting Diode) on the rear of unit. If the proximity sensor is wired incorrectly, the LED will illuminate within the target. Click or tap here for YouTube videos to see how well this tachometer works. Cannot be wired in conjunction with the Dynatek Dyna S or PerTronix Ignitor ignition modules. This tachometer must be wired separately or wiring can be integrated with my crank-trigger ignition system that use a proximity sensor.
  • Tachometer only. Use with virtually any Normally Open 3-wire hall effect, inductive, or cube-shaped inductive proximity sensor (w/flywheel trigger ignition). $22.00 each, plus shipping & handling.
  • Complete Tachometer Kit with Hall Effect Proximity Sensor (dimensions below) and Locking Collar w/Embedded Magnet. When ordering, please indicate diameter of crankshaft PTO end for locking collar. $47.00 each, plus shipping & handling.
  • Complete Tachometer Kit with Inductive Proximity Sensor (dimensions below). Senses the head of a small steel screw in a rotating locking collar, disc or flywheel. $32.00 each, plus shipping & handling.
  • Hall Effect Proximity Sensor. Dimensions: 15/32" Diameter x 2-1/2" Length x 43" Cable Length . (Senses the South pole of a small magnet embedded in an aluminum rotating locking collar, disc, or OEM magnet embedded in a flywheel.) $10.00 each, plus shipping & handling.
  • Inductive Proximity Sensor. Dimensions: 15/32" Diameter x 2-1/2" Length x 43" Cable Length Inductive Proximity Sensor. (Senses the head of a small steel screw in a rotating locking collar, disc or flywheel.) $13.00 each, plus shipping & handling.
  • Aluminum Locking Collar w/Embedded Trigger Magnet and Allen Set Screw. Use with hall effect proximity sensors only.
  • Steel Locking Collar w/Trigger Screw Head and Allen Set Screw. Use with inductive proximity sensors or magnetic pickup coils.
    • When ordering either collar above, please specify diameter of crankshaft PTO end or shaft it's to be mounted on. Most common Kohler crankshaft PTO end diameters are 1", 1-1/8", but 3/4", 1-1/4", 1-3/8", 1-7/16" and 1-1/2" are rare. Most billet steel crankshafts have a 1-1/2" diameter PTO end (raised shoulder). Other sizes available. $15.00 each, plus shipping & handling. [Return to previous section]
Nylon Governor Gear Assemblies for general lawn and garden work. Also suitable for 4,000± RPM competition pulling engines. Fits Kohler engine models K141, K160/K161, K181/M8, K241/M10, K301/M12, K321/M14, K341/M16, K361, KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20. Not available in aftermarket. L
  • Used and in excellent condition. $35.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # A-235743-S. $50.65 each, plus shipping & handling.
Nylon Governor Gear Assemblies designed specifically for Kohler engine models K241/M10, K301/M12, K321/M14 and K341/M16 used with a generator and/or welding unit. Has offset flyweights. Maintains engine RPM at a more steady pace and recovers engine RPM quickly when under a load. Also works great for a 4,000± RPM competition pulling engine. Not available in aftermarket. L
  • New. OEM Kohler part # A-236294-S. $154.70 each, plus shipping & handling.
Cast Iron Governor Gear Assembly. Recommended for high RPM or wide open throttle competition pulling engines. Will not explode like the nylon governor gears sometimes do. (Kohler never made a steel governor gear.) Fits Kohler engine models K141, K160/K161, K181/M8, K241/M10, K301/M12, K321/M14, K341/M16, KT17/KT17 Series II, KT19/KT19 Series II, MV16, M18, MV18, M20 and MV20.
  • Used and in excellent condition. Discontinued from Kohler. OEM Kohler part # A-237031-S. $60.00 each, plus shipping & handling. (When available.) Not available in aftermarket. L
Governor Stop Pin. Retains governor gear on stub shaft. Replace worn or damaged governor stop pin. Not available in aftermarket. L
  • Used and in excellent condition. $3.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part #231355-S. $6.05 each, plus shipping & handling.
Thrust Washers for Governor Gears. A thrust washer is required to prevent the governor gear from wearing against the engine block when the governor is under full pressure from the engine running at higher rpms. Many people are not aware of this small, thin washer and it usually falls out and gets lost while cleaning inside the block. Lubricate the governor stub shaft and thrust washer with motor oil or automotive chassis lube before reinstalling to prevent the governor gear from wearing until the crankcase oil reaches these areas. Each measures 3/8" I.D. x 5/8" O.D.
  • Hardened Steel Thrust Washer. Recommended for nylon governor gear. High quality aftermarket. Replaces Kohler part # 237022-S. $1.00 each, plus shipping & handling.
  • Bronze Thrust Washer. Recommended for cast iron governor gear. High quality aftermarket. Replaces Kohler part # X-25-67-S. $1.00 each, plus shipping & handling.
  • Bronze Thrust Washer. OEM Kohler part # X-25-67-S. $2.70 each, plus shipping & handling.
  • Hardened Steel Thrust Washer. OEM Kohler part # 237022-S. $4.50 each, plus shipping & handling.
Governor Gear Stub Shafts for Kohler engine models K141, K160/K161, K181 and M8. Dimensions of each part below: 3/8" diameter x .625" length. Each is press-fit into block. NOTE: Drive in the stub shaft until .345" (11/32") protrudes from the block.
  • High quality aftermarket. Precision ground, hardened, heat-treated alloy steel. $10.00 each, plus shipping & handling.
  • OEM Kohler part # 230125-S. $24.53 each, plus shipping & handling.

Governor Gear Stub Shafts for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16, K361 and all KT-series and Magnum opposed (flathead) twin cylinder engines. Dimensions: 3/8" diameter x 7/8" length. Each is press-fit into block. NOTE: Drive in each stub shaft until .345" (11/32") protrudes from the block.

  • High quality aftermarket. Precision ground, stainless steel material. $10.00 each, plus shipping & handling.
  • OEM Kohler part # 235125-S. $51.41 each, plus shipping & handling.
1-1/8" Steel Welch Plugs to block access to governor gear stub shaft. Concave/dish-shaped, not cup-shaped. Expands and flattens out with medium size ball peen hammer when installed in counterbore hole with clear RTV silicone adhesive sealant.
  • High quality aftermarket. $1.00 each, plus shipping & handling.
  • OEM Kohler part # X-230-11-S. $1.57 each, plus shipping & handling.
Governor Cross Shafts for Kohler engine models K141, K160/K161 and K181/M8. New shaft includes thrust washer. Steel spacer for this shaft (part # 25 112 17-S) no longer available from Kohler. The lever on these rarely break off. NOTE: Before installing, apply clean motor oil, gear oil or lubricating grease on shaft for smooth governor action and less wear to shaft and/or bushing. OEM Kohler part # 230540-S.
  • Used and not welded. $20.00 each, plus shipping & handling.
  • Used and welded. $25.00 each, plus shipping & handling.
  • New and not welded. $57.65 each, plus shipping & handling.
  • New and welded. $62.00 each, plus shipping & handling.

Steel Thrust Washer for governor cross shaft above È.

  • High quality aftermarket. .50¢ each, plus shipping & handling.
  • OEM Kohler part # X-25-58-S. $1.90 each, plus shipping & handling.


Governor Cross Shafts for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. New shaft includes steel spacer. NOTE: The lever on these sometimes break off. So it'll be a good idea to weld the lever to the shaft. And the entire engine must be completely disassembled to replace this part. And before installing, apply clean motor oil, gear oil or lubricating grease on shaft for smooth governor action and less wear to shaft and/or bushing. OEM Kohler part # A-235256-S.
  • Used and not welded. $10.00 each, plus shipping & handling.
  • Used and welded. $15.00 each, plus shipping & handling.
  • New and not welded. $29.75 each, plus shipping & handling.
  • New and welded. $35.00 each, plus shipping & handling.

Steel Spacer for governor cross shaft above È. Dimensions: .260" I.D. x .372" O.D. x 13/16" length. INSTALLATION NOTE: This part can be replaced without disassembling the engine. Spacer goes between lever and governor shaft bushing. Spacer installs on cross shaft from outside of block, then bushing goes on next. Its purpose is to keep the lever centered with the governor gear.

  • High quality aftermarket. $1.00 each, plus shipping & handling.
  • OEM Kohler part # 25 112 17-S. $4.50 each, plus shipping & handling.
Governor Cross Shaft End Bearing (Tiny Steel Bushing). Fits all older Kohler K-series single cylinder cast iron block engines, except later K-series and all Magnum engines with blind hole machined into block for end of governor cross shaft. OEM Kohler part # 234866-S.
  • Used and in excellent condition. $3.00 each, plus shipping & handling. (When available.)
  • New. $5.35 each, plus shipping & handling.
Governor Cross Shaft Bushings with or without a snug-fitting neoprene rubber O-ring or rubber lip oil seal installed in machined counterbore to prevent dust and dirt/debris from wearing the bushing and/or shaft and prevent messy film of oil on outside of engine. Seal fits snug in bushing and on shaft, and has no effect with operation of governor whatsoever. WHY THIS IS IMPORTANT: Vacuum within the engine crankcase created by the upward stroke of the piston draws in air, along with dust, dirt/debris through the bushing/shaft, and then pressure created by the downward stroke of the piston blows out a fine mist of oil through the bushing/shaft. Overtime, the dust, dirt/debris cause the bushing (and sometimes the shaft, too) to wear, which also leaves an oily mess on the outside of the engine. IMPORTANT: When removing the old bushing, use caution not to drop the governor cross shaft down inside the crankcase! And before installing the new bushing, apply clean motor oil, gear oil or lubricating grease on the shaft for less wear to the shaft, seal and/or bushing, and for smoother throttle action. An ingenious and innovative concept by Brian Miller, because nobody else advertise this improved product or offer this type of service.


Governor Cross Shaft Bushing with 7/32" shaft/hole for Kohler engine models K90/K91, K141, K160/K161 and K181 w/specification # 30100-30848 and various M8 engines with V-shaped/coiled governor spring under bushing. NOTE: When ordering, please specify engine model and specification numbers.
  • Install snug-fitting rubber O-ring oil seal in YOUR governor cross shaft bushing. $5.00 parts and labor, plus return shipping & handling.
  • Repair the worn hole in YOUR governor cross shaft bushing with a new metal sleeve bushing, and install a snug-fitting rubber O-ring seal. $10.00 each for parts and labor, plus shipping & handling.
  • OUR used governor cross shaft bushing machined with snug-fitting rubber O-ring oil seal installed. Bushing no longer available from Kohler. OEM Kohler part # 230476-S. $20.00 each, plus shipping & handling. (When available; not available in aftermarket. L)


Governor Cross Shaft Bushing with 7/32" shaft/hole for Kohler engine model K181 w/specification # 301000-301045, and various M8 engines with coiled extension governor spring. NOTE: When ordering, please specify engine model and specification numbers.
  • Install snug-fitting rubber O-ring oil seal in YOUR governor cross shaft bushing. $5.00 for parts and labor, plus return shipping & handling.
  • Repair the worn hole in YOUR governor cross shaft bushing with a new metal sleeve bushing, and install a snug-fitting rubber O-ring seal. $10.00 each for parts and labor, plus shipping & handling.
  • New governor cross shaft bushing only. OEM Kohler part # 41 158 02-S. $7.25 each, plus shipping & handling.
  • New machined governor cross shaft bushing with snug-fitting rubber O-ring oil seal installed. $12.25 each, plus shipping & handling.


Governor Cross Shaft Bushing with 1/4" shaft/hole for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361.
  • Install snug-fitting rubber O-ring or rubber lip oil seal in YOUR governor cross shaft bushing. $5.00 for seal and labor, plus return shipping & handling.
  • Repair worn hole in YOUR governor cross shaft bushing with a new metal sleeve bushing, and install snug-fitting rubber O-ring or rubber lip oil seal. $10.00 each for parts and labor, plus shipping & handling.
  • New rubber lip oil seal only (customer machines own bushing for installation of oil seal). $3.00 each, plus shipping & handling.
  • Used and in excellent condition. Governor cross shaft bushing with snug-fitting rubber O-ring or rubber lip oil seal installed. Bushing discontinued from Kohler. OEM Kohler part # 235476-S. $20.00 each, plus shipping & handling.

Internal Engine Rebuild Parts for Kohler K-Series and Magnum Engines - Please contact A-1 Miller's if you're interested in any of these parts or services. | [Top of Page]
Cylinder head gasket for Kohler flathead engine models K90/K91. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Click or tap here for cylinder head bolt torque specs. Included in complete engine rebuild gasket set below Ê.
  • High quality aftermarket. $8.00 each, plus shipping & handling.
  • OEM Kohler part # 220124-S. $10.14 each, plus shipping & handling.
Cylinder head gasket for Kohler K-series and Magnum flathead engine models K141, K160/K161, K181 and M8. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Click or tap here for cylinder head bolt torque specs. Included in complete engine rebuild gasket set below Ê.
  • High quality aftermarket. $7.00 each, plus shipping & handling.
  • OEM Kohler part # 41 041 10-S. $10.76 each, plus shipping & handling.
Cylinder head gasket for Kohler K-series and Magnum flathead engine models K241/M10, K301/M12 and K321/M14. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Click or tap here for cylinder head bolt torque specs. Included in complete engine rebuild gasket set below Ê.
  • High quality aftermarket. $6.25 each, plus shipping & handling.
  • OEM Kohler part # 47 041 15-S. $22.40 each, plus shipping & handling.
Cylinder head gasket for Kohler K-series and Magnum flathead engine models K341/M16. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Click or tap here for cylinder head bolt torque specs. Included in complete engine rebuild gasket set below Ê.
  • High quality aftermarket. $11.50 each, plus shipping & handling.
  • OEM Kohler part # 45 041 17-S. $17.52 each, plus shipping & handling.
Cylinder head gasket for Kohler K-series engine model K361. Approximately .050" compressed thickness with steel fire ring. Doesn't need to be retorqued again once hot. Click or tap here for cylinder head bolt torque specs. Included in complete engine rebuild gasket set below Ê. Discontinued from Kohler. Replaces Kohler part # 45 052 02-S and Cub Cadet/MTD part # KH-45-052-02-S.
  • High quality aftermarket. $24.00 each, plus shipping & handling.
Cylinder Head Gasket for Tecumseh engine models VH80, HH80, VH100 and HH100. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Tecumseh part # 32000B.
  • $7.00 each, plus shipping & handling.
Cylinder head gasket for Kohler KT-series and Magnum opposed (flathead) twin cylinder engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Click or tap here for cylinder head bolt torque specs. Included in complete engine rebuild gasket set below Ê.
  • High quality aftermarket. $21.00 each, plus shipping & handling.
  • OEM Kohler part # 52 041 20-S. $25.60 each, plus shipping & handling.
Cylinder head gasket for Kohler opposed (flathead) twin cylinder engine models K482, K532 and K582. Approximately .050" compressed thickness. Doesn't need to be retorqued again once hot. Click or tap here for cylinder head bolt torque specs. Included in complete engine rebuild gasket set below Ê.
  • OEM Kohler part # 48 041 13-S. $11.30 each, plus shipping & handling.
Crankcase Breather Assembly/Cover Gaskets. Fits Kohler engine models K90/K91.
  • High quality aftermarket. Replaces Kohler part # 220370-S. $1.60 each, plus shipping & handling.
  • OEM Kohler part # 220370-S. $4.85 each, plus shipping & handling.


Crankcase Breather Assembly/Cover Gaskets. Fits Kohler engine models K141, K160/K161, K181 and M8.

  • High quality aftermarket. Replaces Kohler part # 230048-S. $1.50 each, plus shipping & handling.
  • OEM Kohler part # 230048-S. $5.00 each, plus shipping & handling.


Crankcase Breather Reed Plate Inner Gaskets. Fits Kohler engine models K241/M10, K301/M12, K330/K331, K321/M14, K341/M16 and K361.

  • High quality aftermarket. Replaces Kohler part # 235048-S. $1.00 each, plus shipping & handling.
  • OEM Kohler part #'s 235048-S. $4.80 per two gaskets, plus shipping & handling.

Crankcase Breather Cover Outer Gaskets. Fits Kohler engine models K241/M10, K301/M12, K330/K331, K321/M14, K341/M16 and K361.

  • High quality aftermarket. Replaces Kohler part # 275144-S. $2.00 each, plus shipping & handling.
  • OEM Kohler part #'s 275144-S. $5.40 each, plus shipping & handling.


Crankcase Breather Assembly/Cover Gaskets. Fits Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20.

  • High quality aftermarket. Replaces Kohler part # 52 055 01-S. $2.00 each, plus shipping & handling.
  • OEM Kohler part # 52 055 01-S. $4.85 each, plus shipping & handling.
Cam Gear Cover Gaskets for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Included in complete engine rebuild gasket sets below Ê. Not available in aftermarket. L
  • OEM Kohler part # 235025-S. $6.00 each, plus shipping & handling.
Expansion Cup Plug or Metal Cover Plate for blocking off oil dipstick tube hole on starter side of engine block on various Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 when the cam gear cover type of oil dipstick tube is used.
  • Expansion Cup Plug. Alternative to using metal cover plate below. 1-1/16" diameter. OEM Kohler part # 25 139 47-S. $2.10 each, plus shipping & handling.
  • Metal Cover Plate. Alternative to using cup plug above. Made of 1/8" thick aluminum or steel. Gasket and screws not included; install with clear RTV silicone adhesive sealant or gasket below. Discontinued from Kohler. Replaces Kohler part # 237262. Fabricated A-1 Miller part. $5.00 each, plus shipping & handling.
  • Gasket for Oil Fill Tube Adaptor to Block. Included in complete engine rebuild gasket sets. OEM Kohler part # 237064-S. $6.90 each, plus shipping & handling.
Oil pan gasket for Kohler engine models K90/K91 (OEM Kohler part # 220157-S) is no longer available separately, except in complete engine rebuild gasket set below Ê.
Oil pan gasket for Kohler engine models K141, K160/K161, K181 and M8. Unlike some 10-16hp engines, the K141, K160/K161, K181 and M8 Kohler engines are wide base blocks. Included in complete engine rebuild gasket set.
  • High quality aftermarket. $2.00 each, plus shipping & handling.
  • OEM Kohler part # 41 041 03-S. $5.45 each, plus shipping & handling.
.030" Thickness Gasket for Narrow Base Block/Oil Pan Kohler engine models K241, K301, K321 and K341 with a narrow cast aluminum or cast iron oil pan. Included in complete engine rebuild gasket set below Ê. Please specify if you have a wide or narrow base block or oil pan. Click or tap here to determine if your engine is a wide or narrow base block.
  • High quality aftermarket. $3.50 each, plus shipping & handling.
  • OEM Kohler part # 235353-S. $6.25 each, plus shipping & handling.
.060" Thickness Gasket for Narrow Block/Oil Pan Kohler engine models K241, K301, K321 and K341 with a pressed steel sheet metal oil pan. Not included in complete engine rebuild gasket set below Ê. Please specify if you have a wide or narrow base block or oil pan. Click or tap here to determine if your engine is a wide or narrow base block.
  • High quality aftermarket. $6.00 each, plus shipping & handling.
  • OEM Kohler part # 47 041 07-S. $13.55 each, plus shipping & handling.
.030" Thickness Wide Base Block/Oil Pan Gasket for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Included in complete engine rebuild gasket set below Ê. Please specify if you have a wide or narrow base block or oil pan. Click or tap here to determine if your engine is a wide or narrow base block.
  • High quality aftermarket. $2.60 each, plus shipping & handling.
  • OEM Kohler part # 235057-S. $6.00 each, plus shipping & handling.
Oil pan gasket for Kohler engine models K482, K532 and K582. Included in complete engine rebuild gasket set.
  • High quality aftermarket. $2.10 each, plus shipping & handling.
  • OEM Kohler part # 277014-S. $8.35 each, plus shipping & handling.
Bearing Plate Shim Gaskets to Set Crankshaft End-Play/Clearance for Kohler engine models K141, K160/K161 and K181. Included in complete engine rebuild gasket set below Ê. NOTE: These gaskets can also be used on the Kohler M8 engine by applying clear RTV silicone adhesive sealant where the cam pin is to prevent an oil leak. And several gaskets of each may be required to obtain correct crankshaft end-play/clearance. Please specify the thickness you need. Not available in aftermarket. L
  • .015" thickness. OEM Kohler part # 230112-S. $3.45 each, plus shipping & handling.
  • .030" thickness. OEM Kohler part # 230071-S. $6.25 each, plus shipping & handling
Bearing Plate Shim Gaskets to Set Crankshaft End-Play/Clearance for Kohler engine models K241, K301, K321, K341 and K361. Included in complete engine rebuild gasket set below Ê. NOTE: These gaskets can also be used on the Kohler M10, M12, M14 and M16 engines by applying clear RTV silicone adhesive sealant where the cam pin is to prevent an oil leak. And several gaskets of each may be required to obtain correct crankshaft end-play/clearance. Please specify the thickness you need. Not available in aftermarket. L
  • .015" thickness. OEM Kohler part # 235070-S. $4.75 each, plus shipping & handling.
  • .030" thickness. OEM Kohler part # 235757-S. $8.15 each, plus shipping & handling.
Closure Plate Gasket for Kohler engine models KT17, KT17 Series II, KT19, KT19 Series II, M18 and M20. NOTE: If engine originally came with a gasket, reinstall a new gasket to maintain correct crankshaft end-play/clearance. But if engine originally came with silicone sealant only, apply silicone instead of a gasket to maintain correct crankshaft end-play/clearance. Download and refer to Kohler service manuals TP-2043-A (KT17, KT17 Series II, KT19, KT19 Series II) or TP-2204-B (M18 and M20) for more information. (PDF files.) Kohler engine models MV16, MV18 and MV20 do not use a gasket. These use silicone sealant instead. Not available in aftermarket. L
  • OEM Kohler part # 52 041 15-S. $7.69 each, plus shipping & handling.
Crankshaft Oil Seals for Kohler engine models K90/K91. Each included in complete engine rebuild gasket set below Ê. IMPORTANT: Apply clean motor oil, gear oil or lubricating grease in lip of seal before installing to keep seal lubricated and cool until crankcase oil can reach it. With no prior lubrication, the dry rubber will get hot from friction and burn away, causing an oil leak.
  • Flywheel End:
    • High quality aftermarket. $7.00 each, plus shipping & handling.
    • OEM Kohler part # X-271-15-S. $7.20 each, plus shipping & handling.
  • PTO End:
    • High quality aftermarket. $8.00 each, plus shipping & handling.
    • OEM Kohler part # X-271-16-S. $9.85 each, plus shipping & handling.


Crankshaft Oil Seals for Kohler engine models K141, K160/K161, K181 and M8. Each included in complete engine rebuild gasket set below Ê. IMPORTANT: Apply clean motor oil, gear oil or lubricating grease in lip of seal before installing to keep seal lubricated and cool until crankcase oil can reach it. With no prior lubrication, the dry rubber will get hot from friction and burn away, causing an oil leak.

  • Flywheel End
    • High quality aftermarket. $4.00 each, plus shipping & handling.
    • OEM Kohler part # X-583-1-S. $7.50 each, plus shipping & handling.
  • PTO End:
    • High quality aftermarket; $5.00 each, plus shipping & handling.
    • OEM Kohler part # X-583-2-S. $7.50 each, plus shipping & handling.


Crankshaft Oil Seals for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Each included in complete engine rebuild gasket sets below Ê. IMPORTANT: Apply clean motor oil, gear oil or lubricating grease in lip of seal before installing to keep seal lubricated and cool until crankcase oil can reach it. With no prior lubrication, the dry rubber will get hot from friction and burn away, causing an oil leak.

  • Flywheel End. Dimensions of each seal: 1.500" I.D. x 2.004" O.D. x 1/4" thickness.
    • High quality aftermarket. $4.00 each, plus shipping & handling.
    • OEM Kohler part # 47 032 06-S. $14.15 each, plus shipping & handling.
  • PTO End. Dimensions: 1.500" I.D. x 2.375" O.D. x 1/4" thickness.
    • High quality aftermarket. Rubber coated metal housing. $5.00 each, plus shipping & handling.
    • High quality aftermarket. Metal housing. Suitable for Kohler engine models K341, M16 and K361 to prevent seal from being sucked into crankcase (next to main bearing) due to internal piston vacuum. Dimensions: 1.500" I.D. x 2.375" O.D. x 5/16" thickness. $10.00 each, plus shipping & handling.
    • OEM Kohler part # 47 032 07-S. Rubber Housing. $14.15 each, plus shipping & handling.

Oil Seal Installation Drivers/Tools. Made specifically for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Use with medium size hammer to safely drive oil seal into counterbore with crankshaft in or out of engine. When installed, flywheel end driver positions seal 3/8" below surface of large bearing plate (with the 15/20 amp charging stator), and PTO driver positions seal 1/4" below surface of engine block. Machined by A-1 Miller's.

  • Driver for Installing Flywheel End Oil Seal. $20.00 each, plus shipping & handling.
  • Driver for Installing PTO End Oil Seal. $20.00 each, plus shipping & handling.
  • Both Oil Seal Drivers/Tools for $35.00/set, plus shipping & handling.


Flywheel End Crankshaft Oil Seal for Kohler horizontal and vertical shaft opposed (flathead) twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20, and PTO end only on vertical shaft engine models MV16, MV18 and MV20. Dimensions: 1.375" I.D. x 1.750" O.D. x 1/4" thickness. Included in complete engine rebuild gasket set below Ê. IMPORTANT: Apply clean motor oil, gear oil or lubricating grease in lip of seal before installing to keep seal lubricated and cool until crankcase oil can reach it. With no prior lubrication, the dry rubber will get hot from friction and burn away, causing an oil leak. Not available in aftermarket. L

  • OEM Kohler part # 52 032 10-S. $15.40 each, plus shipping & handling.

PTO End Crankshaft Oil Seal for Kohler horizontal shaft opposed (flathead) twin cylinder engine models KT17, KT17 Series II, and M18. Dimensions: 1.375" I.D. x 2.375" O.D. Included in complete engine rebuild gasket set below Ê. IMPORTANT: Apply clean motor oil, gear oil or lubricating grease in lip of seal before installing to keep seal lubricated and cool until crankcase oil can reach it. With no prior lubrication, the dry rubber will get hot from friction and burn away, causing an oil leak.

  • OEM Kohler part # X-583-5-S. $14.10 each, plus shipping & handling.


Flywheel End Crankshaft Oil Seal for Kohler horizontal shaft opposed (flathead) twin cylinder engine models K482, K532 and K582. Dimensions: 1.425" I.D. x 2.382" O.D. IMPORTANT: Apply clean motor oil, gear oil or lubricating grease in lip of seal before installing to keep seal lubricated and cool until crankcase oil can reach it. With no prior lubrication, the dry rubber will get hot from friction and burn away, causing an oil leak. Not available in aftermarket. L

  • OEM Kohler part # 25 032 06-S. $23.45 each, plus shipping & handling.

PTO End Crankshaft Oil Seal for Kohler horizontal shaft opposed (flathead) twin cylinder engine models KT19, KT19 Series II, M20, K482, K532 and K582. Dimensions: 1.642" I.D. x 2.500" O.D. Included in complete engine rebuild gasket set below Ê. IMPORTANT: Apply clean motor oil, gear oil or lubricating grease in lip of seal before installing to keep seal lubricated and cool until crankcase oil can reach it. With no prior lubrication, the dry rubber will get hot from friction and burn away, causing an oil leak.

  • OEM Kohler part # 277065-S. $4.70 each, plus shipping & handling.
Complete Engine Rebuild Gasket Sets w/Oil Seals | [Return to Previous Section, Paragraph or Website]
Complete engine rebuild gasket sets w/oil seals for Kohler engine models K141, K160/K161 and K181. NOTE: These gasket sets can also be used on the Kohler M8 engine by applying clear RTV silicone adhesive sealant where the cam pin is to prevent an oil leak.
  • High quality aftermarket. Does not include crankcase breather filter. $30.50 each, plus shipping & handling.
  • OEM Kohler part # 41 755 06-S. $74.70 each, plus shipping & handling.
Complete engine rebuild gasket sets w/oil seals for Kohler K-series engine models K241, K301 and K321. NOTE: These gasket sets can also be used on the Kohler M10, M12 and M14 engines by applying clear RTV silicone adhesive sealant where the cam pin is to prevent an oil leak.
  • High quality aftermarket. Does not include crankcase breather filter. $32.50 each, plus shipping & handling.
  • OEM Kohler part # 47 755 08-S. $100.70 each, plus shipping & handling.
Complete engine rebuild gasket sets w/oil seals for Kohler K-series engine model K341. NOTE: These gasket sets can also be used on the Kohler M16 engine by applying clear RTV silicone adhesive sealant where the cam pin is to prevent an oil leak.
  • High quality aftermarket. Does not include crankcase breather filter. $36.50 each, plus shipping & handling.
  • OEM Kohler part # 45 755 04-S. $82.90 each, plus shipping & handling.
Complete engine rebuild gasket sets w/oil seals and valve stem seals for Kohler K-series and Magnum opposed (flathead) twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20.
  • High quality aftermarket. Does not include crankcase breather filter. $50.00 each, plus shipping & handling.
  • OEM Kohler part #'s 25 755 37-S, 52 755 93-S. $152.00 each, plus shipping & handling..
Complete engine rebuild gasket set w/oil seals for Kohler K-series model K361 cast iron block single cylinder OHV engine. High quality aftermarket. Discontinued from Kohler. Replaces Kohler part # 45 755 06-S.
  • $60.00 each, plus shipping & handling.
Complete engine rebuild gasket set w/oil seals for Kohler opposed (flathead) twin cylinder engine models K482, K532 and K582. Discontinued from Kohler. Replaces Kohler part # 48 755 33-S. NOTE: The gaskets and oil seals for the Kohler K482, K532 and K582 engines will not fit the K660/K662 engines.
  • High quality aftermarket. $40.00 each, plus shipping & handling.
More parts to be added later. If you need something that's not listed here, please contact A-1 Miller's and I'll see if I can get it at a reasonable price. Please contact A-1 Miller's if you're interested in any of the above È parts. [Return to Previous Section, Paragraph or Website]

New Ring Sets, and Piston and Ring Set - Please contact A-1 Miller's if you're interested in any of these parts or services. | [Top of Page]

NOTE: I sell individual engine parts only. Because with "complete" engine rebuild kits that others offer, they always sell you extra parts your engine don't need, and/or leave out parts your engine do need. Completely disassemble your engine to determine which parts your engine needs and if the cylinder in your block and crank journal needs machine work performed, then email me a list of parts. Include the engine's model and specification numbers, too.
Kohler engine models K90/K91 Ring Sets, and Piston with Rings (includes wrist pin, retaining clips). Rings made of high grade cast iron for durability. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K90/K91 engines with 2.375" cylinder bore. Also replaces Briggs and Stratton part #'s 294232, 295657 (3hp), and Clinton part #'s 233112500, 233122500.
    • High quality aftermarket. Same quality as OEM Kohler part # 220801-S. $13.00 per set, plus shipping & handling.
    • OEM Kohler part # 220801-S. $50.00 per set, plus shipping & handling.
  • STD Size Piston with Rings Assembly. Fits K90/K91 engines with 2.375" cylinder bore. OEM Kohler part # 46 874 01-S. $182.85 per set, plus shipping & handling. Not available in aftermarket. L
  • .003" Oversize Piston and Ring Assembly. Fits K90/K91 engines with 2.378" cylinder bore. OEM Kohler part # 46 874 02-S. $213.50 per set, plus shipping & handling. Not available in aftermarket. L
  • .010" Oversize Rings Only. Fits K90/K91 engines with 2.385" cylinder bore. OEM Kohler part # 220802-S. Also replaces Briggs and Stratton part # 294224 (NLA). $64.00 per set, plus shipping & handling. Not available in aftermarket. L
  • .010" Oversize Piston with Rings Assembly. Fits K90/K91 engines with 2.385" cylinder bore. OEM Kohler part # 46 874 03-S. $213.50 per set, plus shipping & handling. Not available in aftermarket. L
  • .020" Oversize Rings Only. Fits K90/K91 engines with 2.395" cylinder bore. OEM Briggs and Stratton part # 294225. Also replaces Kohler part # 220803-S (NLA). $60.00 per set, plus shipping & handling. .020" oversize (2.395" cylinder bore. OEM Kohler part # 46 874 04-S. $213.50 per set, plus shipping & handling.
  • .030" Oversize Ring Sets Only. Fits K90/K91 engines with 2.405" cylinder bore. Not available in aftermarket. L
    • OEM Briggs and Stratton part # 294226. $60.00 per set, plus shipping & handling.
    • OEM Kohler part # 220804-S. $81.80 per set, plus shipping & handling.
  • .030" Oversize Piston with Rings. Fits K90/K91 engines with 2.405" cylinder bore. OEM Kohler part # 46 874 05-S. $213.50 per set, plus shipping & handling. Not available in aftermarket. L
Kohler engine models K141, K160 and early K161 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). These are for the small 2-7/8" size cylinder bore. Cylinder can be bored to 2-15/16", and the bigger piston and rings below can be used. Rings made of high grade cast iron for durability. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. Not available in aftermarket. L
  • STD Size Rings Only. Fits K141, K160 and early K161 engines with 2.875" cylinder bore. Discontinued from Kohler. OEM Kohler part # 231424-S. $48.00 each, plus shipping & handling. (New Old Stock - When available.)
  • STD Size Piston and Ring Assembly. Fits K141, K160 and early K161 engines with 2.875" cylinder bore. OEM Kohler part # 41 874 01-S. $153.90 each, plus shipping & handling.
  • .010" Oversize Rings Only. Fits K141, K160 and early K161 engines with 2.885" cylinder bore. OEM Kohler part # 231425-S. $79.80 each, plus shipping & handling.
  • .010" Oversize Piston and Ring Assembly. Fits K141, K160 and early K161 engines with 2.885" cylinder bore. OEM Kohler part # 41 874 02-S. Discontinued from Kohler. L
  • .020" Oversize Rings Only. Fits K141, K160 and early K161 engines with 2.895" cylinder bore. OEM Kohler part # 231426-S. $82.35 each, plus shipping & handling.
  • .020" Oversize Piston and Ring Assembly. Fits K141, K160 and early K161 engines with 2.895" cylinder bore. OEM Kohler part # 41 874 03-S. $197.80 each, plus shipping & handling.
  • .030" Oversize Rings Only. Fits K141, K160 and early K161 engines with 2.905" cylinder bore. OEM Kohler part # 231427-S. $82.35 each, plus shipping & handling.
  • .030" Oversize Piston with Rings Assembly. Fits K141, K160 and early K161 engines with 2.905" cylinder bore. OEM Kohler part # 41 874 04-S. Discontinued from Kohler. L
Kohler K-series and Magnum engine models K141, K160/K161, K181 and M8 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). These are for the bigger 2-15/16" size cylinder bore. Rings made of high grade cast iron for durability. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K141, K160/K161, K181 and M8 engines with 2.938" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 232575-S. $16.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 232575-S. $60.10 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 01-S. $61.50 each, plus shipping & handling.
  • STD Size Piston and Ring Assemblies. Fits K141, K160/K161, K181 and M8 engines with 2.938" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 41 874 05-S. $44.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 41 874 05-S. $181.45 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 41 874 10-S. $156.40 each, plus shipping & handling.
  • .003" Oversize Piston with Rings Assembly. Fits K141, K160/K161, K181 and M8 engines with 2.941" cylinder bore. Not available in aftermarket. L
    • K-series cast piston and rings. OEM Kohler part # 41 874 06-S. $193.30 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 41 874 11-S. $151.25 each, plus shipping & handling.
  • .010" Oversize Ring Sets Only. Fits K141, K160/K161, K181 and M8 engines with 2.948" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 232576-S. $11.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 232576-S. $54.00 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 02-S. $65.65 each, plus shipping & handling.
  • .010" Oversize Piston and Ring Assemblies. Fits K141, K160/K161, K181 and M8 engines with 2.948" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 41 874 07-S. $31.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 41 874 07-S. $181.45 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 41 874 12-S. $151.10 each, plus shipping & handling.
  • .020" Oversize Ring Sets Only. Fits K141, K160/K161, K181 and M8 engines with 2.958" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 232577-S. $30.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 232577-S. $78.80 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 03-S. $66.00 each, plus shipping & handling.
  • .020" Oversize Piston and Ring Assemblies. Fits K141, K160/K161, K181 and M8 engines with 2.958" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 41 874 08-S. $50.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 41 874 08-S. $193.45 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 41 874 13-S. Discontinued from Kohler. L
  • .030" Oversize Ring Sets Only. Fits K141, K160/K161, K181 and M8 engines with 2.968" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 232578-S. $13.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 232578-S. $78.95 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 04-S. $66.00 each, plus shipping & handling.
  • .030" Oversize Piston and Ring Assemblies. Fits K141, K160/K161, K181 and M8 engines with 2.968" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 41 874 09-S. $41.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 41 874 09-S. $188.30 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 41 874 14-S. $151.25 each, plus shipping & handling.
Kohler K-series and Magnum engine models K241, M10 and K482 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K241, M10 and K482 engines use the same piston and rings.) Priced per cylinder. Rings made of high grade cast iron for durability. Compression height is 1.63". Being the wrist pin is centered, these pistons can be installed in either direction. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K241, M10 and K482 engines with 3.250" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 235287-S. $22.00 each, plus shipping & handling.
    • OEM Kohler part # 235287-S. $72.20 each, plus shipping & handling.
  • STD Size Piston and Ring Assemblies. Fits K241, M10 and K482 engines with 3.250" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 47 874 01-S. $43.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 01-S. $216.00 each, plus shipping & handling.
  • .003" Oversize Cast Piston with Rings Assembly. Fits K241, M10 and K482 engines with 3.253" cylinder bore.
    • OEM Kohler part # 47 874 02-S. $221.00 each, plus shipping & handling. Not available in aftermarket. L
  • .010" Oversize Ring Sets Only. Fits K241, M10 and K482 engines with 3.260" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 235288-S. $19.00 each, plus shipping & handling.
    • OEM Kohler part # 235288-S. $83.00 each, plus shipping & handling.
  • .010" Oversize Piston and Ring Assemblies. Fits K241, M10 and K482 engines with 3.260" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 47 874 03-S. $32.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 03-S. $216.00 each, plus shipping & handling.
  • .020" Oversize Ring Sets Only. Fits K241, M10 and K482 engines with 3.270" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 235289-S. $14.00 each, plus shipping & handling.
    • OEM Kohler part # 235289-S. $95.14 each, plus shipping & handling.
  • .020" Oversize Piston and Ring Assemblies. Fits K241, M10 and K482 engines with 3.270" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 47 874 04-S. $40.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 04-S. $247.81 each, plus shipping & handling.
  • .030" Oversize Ring Sets Only. Fits K241, M10 and K482 engines with 3.280" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 235290-S. $14.00 each, plus shipping & handling.
    • OEM Kohler part # 235290-S. $95.14 each, plus shipping & handling.
  • .030" Oversize Piston and Ring Assemblies. Fits K241, M10 and K482 engines with 3.280" cylinder bore.
    • High quality aftermarket. Same quality as OEM Kohler part # 47 874 05-S. $45.00 each, plus shipping & handling.
    • OEM Kohler part # 47 874 05-S. $247.81 each, plus shipping & handling.
Kohler K-series/Magnum models K301, M12 and K532 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K301, M12 and K532 engines use the same piston and rings.) Priced per cylinder. Rings made of high grade cast iron for durability. Compression height is 1.7". Being the wrist pin is centered, these pistons can be installed in either direction. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K301, M12 and K532 engines with 3.375" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 01-S. $16.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 01-S. $69.59 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 01-S. $82.17 each, plus shipping & handling.
  • STD Size Piston and Ring Assemblies. Fits K301, M12 and K532 engines with 3.375" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 06-S and 48 874 01-S. $39.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 06-S. $184.44 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 48 874 01-S. $288.99 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 16-S. Discontinued from Kohler. L
  • .003" Oversize Piston with Rings Assembly. Fits K301, M12 and K532 engines with 3.378" cylinder bore. Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 17-S. Discontinued from Kohler. L
  • .010" Oversize Ring Sets Only. Fits K301, M12 and K532 engines with 3.385" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 02-S. $18.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 02-S. $119.30 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 02-S. $102.75 each, plus shipping & handling.
  • .010" Oversize Piston and Ring Assemblies. Fits K301, M12 and K532 engines with 3.385" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 08-S and 48 874 03-S. $45.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 08-S. $247.81 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 48 874 03-S. $228.89 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 18-S. Discontinued from Kohler. L
  • .020" Oversize Ring Sets Only. Fits K301, M12 and K532 engines with 3.395" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 03-S. $18.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 03-S. $119.30 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 03-S. $83.03 each, plus shipping & handling.
  • .020" Oversize Piston and Ring Assemblies. Fits K301, M12 and K532 engines with 3.395" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 09-S and 48 874 04-S. $46.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 09-S. $247.81 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 48 874 04-S. $228.99 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 19-S. $182.66 each, plus shipping & handling.
  • .030" Oversize Ring Sets Only. Fits K301, M12 and K532 engines with 3.405" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 04-S. $18.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 04-S. $119.19 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 04-S. $83.03 each, plus shipping & handling.
  • .030" Oversize Piston and Ring Assemblies. Fits K301, M12 and K532 engines with 3.405" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 10-S. $36.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 10-S. $247.81 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 20-S. $182.66 each, plus shipping & handling.
  • .040" Oversize Cast Pistons with High Quality Rings. Fits K301, M12 and K532 engines with 3.415" cylinder bore. Same quality as OEM Kohler. Not available from Kohler. $45.00 each, plus shipping & handling. Ring set not available separately. L
Kohler K-series and Magnum models K321, M14 and K582 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K321, M14 and K582 engines use the same piston and rings.) Priced per cylinder. Compression height is 1.7". Rings made of high grade cast iron for durability. And being the wrist pin is centered, these pistons can be installed in either direction. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K321, M14 and K582 engines with 3.500" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 05-S. $24.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 05-S. $101.23 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 05-S. Discontinued from Kohler. L
  • STD Size Piston and Ring Assemblies. Fits K321, M14 and K582 engines with 3.500" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 11-S. $55.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 11-S. Discontinued from Kohler. L
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 21-S. Discontinued from Kohler. L
  • .003" Oversize Cast Piston with Rings Assembly. Fits K321, M14 and K582 engines with 3.503" cylinder bore. OEM Kohler part # 47 874 12-S. $191.75 each, plus shipping & handling.
  • .010" Oversize Ring Sets Only. Fits K321, M14 and K582 engines with 3.510" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 06-S. $18.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 06-S. $102.75 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 06-S. Discontinued from Kohler. L
  • .010" Oversize Piston and Ring Assemblies. Fits K321, M14 and K582 engines with 3.510" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 13-S. $52.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 13-S. $247.81 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 23-S. $301.81 each, plus shipping & handling.
  • .020" Oversize Ring Sets Only. Fits K321, M14 and K582 engines with 3.520" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 07-S. $15.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 07-S. $119.30 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 07-S. $106.22 each, plus shipping & handling.
  • .020" Oversize Piston and Ring Assemblies. Fits K321, M14 and K582 engines with 3.520" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 14-S. $49.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 14-S. Discontinued from Kohler. L
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 24-S. Discontinued from Kohler. L
  • .030" Oversize Ring Sets Only. Fits K321, M14 and K582 engines with 3.530" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 48 108 08-S. $14.50 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 48 108 08-S. $119.30 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 47 108 08-S. Discontinued from Kohler. L
  • .030" Oversize Piston and Ring Assemblies. Fits K321, M14 and K582 engines with 3.530" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 47 874 15-S. $49.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 47 874 15-S. $247.81 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 47 874 25-S. Discontinued from Kohler. L
  • .040" Oversize Cast Pistons with High Quality Rings. Fits K321, M14 and K582 engines with 3.415" cylinder bore. Same quality as OEM Kohler. Not available from Kohler. $60.00 each, plus shipping & handling. Ring set not available separately. L
Kohler K-series and Magnum engine models K341, M16 and K361 Ring Sets, and Piston and Ring Sets (includes wrist pin and retaining clips). (The K341, M16 and K361 engines use the same piston and rings.) Compression height is 1.7". Rings made of high grade cast iron for durability. Wrist pin is offset to reduce piston slap. Therefore, piston installs with notch facing flywheel. IMPORTANT: Check ring end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. Fits K341, M16 and K361 engines with 3.750" cylinder bore.
    • Fits K-series cast piston. High quality aftermarket. Same quality as OEM Kohler part # 45 108 06-S. $26.00 each, plus shipping & handling.
    • Fits K-series cast piston. OEM Kohler part # 45 108 06-S. $94.09 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 41 108 01-S. $67.18 each, plus shipping & handling.
  • STD Size Piston and Ring Assemblies. Fits K341, M16 and K361 engines with 3.750" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 45 874 01-S. $85.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 45 874 01-S. $290.59 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 45 874 11-S. Discontinued from Kohler. L
  • .003" Oversize Cast Piston and Ring Assemblies. Fits K341, M16 and K361 engines with 3.753" cylinder bore. Not available in aftermarket. L
    • K-series cast piston and rings. OEM Kohler part # 45 874 02-S. $309.81 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 45 874 12-S. Discontinued from Kohler. L
  • .010" Oversize Ring Sets Only. Fits K341, M16 and K361 engines with 3.760" cylinder bore. Not available in aftermarket. L
    • Fits K-series cast piston. OEM Kohler part # 45 108 07-S. $98.63 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 45 108 11-S. $143.45 each, plus shipping & handling.
  • .010" Oversize Piston and Ring Assemblies. Fits K341, M16 and K361 engines with 3.760" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 45 874 03-S. $85.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 45 874 03-S. $290.59 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 45 874 13-S. $317.30 each, plus shipping & handling.
  • .020" Oversize Ring Sets Only. Fits K341, M16 and K361 engines with 3.770" cylinder bore. Not available in aftermarket. L
    • Fits K-series cast piston. OEM Kohler part # 45 108 08-S. $98.63 each, plus shipping & handling.
    • Fits Magnum Mahle forged piston. OEM Kohler part # 45 108 12-S. $106.80 each, plus shipping & handling.
  • .020" Oversize Piston and Ring Assemblies. Fits K341, M16 and K361 engines with 3.770" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 45 874 04-S. $85.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 45 874 04-S. $322.20 each, plus shipping & handling.
    • Magnum Mahle forged piston and rings. OEM Kohler part # 45 874 14-S. Discontinued from Kohler. L
  • .030" Oversize Rings Only. Fits K341, M16 and K361 engines with 3.780" cylinder bore. Not available in aftermarket. L
    • Fits K-series cast piston. OEM Kohler part # 45 108 09-S. Discontinued from Kohler. L
    • Fits Magnum Mahle forged piston. OEM Kohler part # 45 108 13-S. $106.80 each, plus shipping & handling.
  • .030" Oversize Piston and Ring Assemblies. Fits K341, M16 and K361 engines with 3.780" cylinder bore.
    • K-series cast piston and rings. High quality aftermarket. Same quality as OEM Kohler part # 45 874 05-S. $85.00 each, plus shipping & handling.
    • K-series cast piston and rings. OEM Kohler part # 45 874 05-S. Discontinued from Kohler. L
    • Magnum Mahle forged piston and rings. OEM Kohler part # 45 874 15-S. Discontinued from Kohler. L
  • .040" Oversize Cast Pistons with High Quality Rings. Fits K341, M16 and K361 engines with 3.790" cylinder bore. Same quality as OEM Kohler. Not available from Kohler. $85.00 each, plus shipping & handling. Ring set not available separately. L [Return To Previous Paragraph, Section or Website]
Piston Wrist Pin Retainers for 5/8" diameter wrist pins. Fits Kohler engine models K141, K160/K161, K181, M8, KT17, KT17 Series II, MV16, M18 and MV18. FYI - Snap ring retainers last longer than the OEM Cir-Clips because there's more "wear area" around them due to the flat area.
  • 5/8" Internal Snap Ring. $1.50 each, plus shipping & handling.
  • 5/8" Wire Cir-Clip. OEM Kohler part # 230004-S. $4.00 each, plus shipping & handling.

Piston Wrist Pin Retainers for 3/4" diameter wrist pins. Fits Kohler engine models KT19, KT19 Series II, M20 and MV20. FYI - Snap ring retainers last longer than the OEM Cir-Clips because there's more "wear area" around them due to the flat area.

  • 3/4" Internal Snap Ring. $1.50 each, plus shipping & handling.
  • 3/4" Wire Cir-Clip. OEM Kohler part # 52 141 01-S. $4.35 each, plus shipping & handling.


Ring Sets Only and Cast Pistons with Rings for Kohler flathead twin cylinder engine models KT17, KT17 Series II, MV16, M18 and MV18. The KT17, KT17 Series II, MV16, M18 and MV18 pistons all have the same dimensions, same wrist pin hole size (.6247"-.6249") and same compression height (1.125"), and accept the same rings. The only difference is the KT17 and KT17 Series II pistons are cast aluminum, and the MV16, M18 and MV18 pistons are forged, and made by Mahle. The KT-series rings will also fit the Mahle pistons, the Mahle pistons are not available for these engines. Priced per cylinder. To maintain engine balance and reduce vibration, two sets of matching oversize piston and rings are required. IMPORTANT: Check ring end gaps for proper clearance before installing to prevent rings from galling the cylinder wall when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD Size Ring Sets Only. (3.125" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 09-S. $90.35 each set (for one cylinder), plus shipping & handling.
  • STD Size Cast Pistons with Rings. (3.125" diameter cylinder bore.)
    • High Quality aftermarket. Replaces Kohler part # 52 875 01-S. $60.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 01-S. $256.90 each, plus shipping & handling.
  • .010" Oversize Ring Sets Only. (3.135" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 10-S. $88.35 each set (for one cylinder), plus shipping & handling.
  • .010" Oversize Cast Pistons with Rings. (3.135" diameter cylinder bore.)
    • High Quality aftermarket. Replaces Kohler part # 52 875 03-S. $60.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 03-S. $257.15 each, plus shipping & handling.
  • .020" Oversize Ring Set. (3.145" diameter cylinder bore.)
    • High quality aftermarket. $40.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 11-S. $99.40 each set (for one cylinder), plus shipping & handling. Not available in aftermarket.
  • .020" Oversize Cast Piston with Rings. (3.145" diameter cylinder bore.)
    • OEM Kohler part # 52 874 04-S. $293.00 each, plus shipping & handling. Not available in aftermarket. L
  • .030" Oversize Ring Set. (3.155" diameter cylinder bore.)
    • High quality aftermarket. $40.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 12-S. Discontinued from Kohler. L
  • .030" Oversize Cast Piston with Rings. (3.155" diameter cylinder bore.) OEM Kohler part # 52 874 05-S. $293.30 each, plus shipping & handling. Not available in aftermarket. L

Mahle Piston, Pin, Clips with Rings for models KT17, KT17 Series II, MV16, M18, MV18. Wrist pin diameter: .6247"-.6249". Compression height: 1.125". Priced per cylinder. Rings not available separately. To maintain engine balance and reduce vibration, two sets of matching oversize piston and rings are required. IMPORTANT: Check ring gap end gaps and piston thrust face for proper clearance before installing to prevent rings from galling the cylinder wall when hot and piston from seizing in the cylinder when hot. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. Not available in aftermarket. L

  • STD Size Ring Sets Only. (3.125" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 09-S. $90.35 each set (for one cylinder), plus shipping & handling.
  • STD Size Mahle Pistons with Rings. (3.125" diameter cylinder bore.)
    • High Quality aftermarket. Replaces Kohler part # 52 875 01-S. $60.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 01-S. $256.90 each, plus shipping & handling.
  • .010" Oversize Ring Sets Only. (3.135" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 10-S. $88.35 each set (for one cylinder), plus shipping & handling.
  • .010" Oversize Mahle Pistons with Rings. (3.135" diameter cylinder bore.)
    • High Quality aftermarket. Replaces Kohler part # 52 875 03-S. $60.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 03-S. $257.15 each, plus shipping & handling.
  • .020" Oversize Ring Set. (3.145" diameter cylinder bore.)
    • High Quality aftermarket. Replaces Kohler part # 52 108 11-S. $40.00 each, plus shipping & handling.
    • OEM Kohler part # 52 108 11-S. $99.40 each set (for one cylinder), plus shipping & handling.
  • .020" Oversize Mahle Piston with Rings. (3.145" diameter cylinder bore.)
    • High Quality aftermarket. $75.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 04-S. $293.00 each, plus shipping & handling.
  • .030" Oversize Ring Set. (3.155" diameter cylinder bore.) High quality aftermarket. Replaces Kohler part # 52 108 12-S. $40.00 each, plus shipping & handling.
  • .030" Oversize Mahle Piston with Rings. (3.155" diameter cylinder bore.)
    • High Quality aftermarket. $75.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 05-S. $293.30 each, plus shipping & handling.


Cast Pistons, Pins, Clips with Rings for models KT19, KT19 Series II, M20, MV20. Wrist pin diameter: .7499"-.7501". Compression height: 1.1875". Priced per cylinder. To maintain engine balance and reduce vibration, two sets of matching oversize piston and rings are required. The KT-series cast piston thrust face to cylinder bore oil clearance is .007"-.010". Not available in aftermarket. L

  • STD Size Ring Sets Only. (3.125" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 09-S. $76.90 each set (for one cylinder), plus shipping & handling.
  • STD Size Cast Piston with Rings. (3.125" diameter cylinder bore.) OEM Kohler part # 52 874 06-S. Discontinued from Kohler. L
  • .010" Oversize Ring Sets Only. (3.135" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 10-S. $88.35 each set (for one cylinder), plus shipping & handling.
  • .010" Oversize Cast Piston with Rings. (3.135" cylinder bore.) OEM Kohler part # 52 874 08-S. $260.95 each, plus shipping & handling.
  • .020" Oversize Ring Set. (3.145" diameter cylinder bore.)
    • High quality aftermarket. $40.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 11-S. $99.40 each set (for one cylinder), plus shipping & handling.
  • .020" Oversize Cast Piston with Rings. (3.145" diameter cylinder bore.) OEM Kohler part # 52 874 09-S. $306.70 each, plus shipping & handling.
  • .030" Oversize Ring Sets Only. (3.155" diameter cylinder bore.) High quality aftermarket. $40.00 each set (for one cylinder), plus shipping & handling.
  • .030" Oversize Cast Piston with Rings. (3.155" diameter cylinder bore.) OEM Kohler part # 52 874 10-S. Discontinued from Kohler. L


Mahle Pistons, Pins, Clips with Rings for models KT19, KT19 Series II, M20, MV20. Wrist pin diameter: .7499"-.7501". Compression height: 1.1875". Priced per cylinder. Rings not available separately. To maintain engine balance and reduce vibration, two sets of matching oversize piston and rings are required. The Mahle forged piston thrust face to cylinder bore clearance is .0045"-.0062". Not available in aftermarket. L

  • STD Size Ring Sets Only. (3.125" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 09-S. $76.90 each set (for one cylinder), plus shipping & handling.
  • STD Size Mahle Piston with Rings. (3.125" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 874 16-S. $75.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 874 16-S. $173.83 each, plus shipping & handling.
  • .010" Oversize Ring Sets Only. (3.135" diameter cylinder bore.)
    • High quality aftermarket. $30.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 10-S. $88.35 each set (for one cylinder), plus shipping & handling.
  • .010" Oversize Mahle Piston with Rings. (3.135" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 874 18-S. $75.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 18-S. $168.53 each, plus shipping & handling.
  • .020" Oversize Ring Set. (3.145" diameter cylinder bore.)
    • High quality aftermarket. $40.00 each set (for one cylinder), plus shipping & handling.
    • OEM Kohler part # 52 108 11-S. $99.40 each set (for one cylinder), plus shipping & handling.
  • .020" Oversize Mahle Piston with Rings. (3.145" diameter cylinder bore.)
    • High quality aftermarket. Replaces Kohler part # 52 874 19-S. $75.00 each, plus shipping & handling.
    • OEM Kohler part # 52 874 19-S. $163.90 each, plus shipping & handling.
  • .030" Oversize Ring Sets Only. (3.155" diameter cylinder bore.) High quality aftermarket. $40.00 each set (for one cylinder), plus shipping & handling.
  • .030" Oversize Mahle Piston with Rings. (3.155" diameter cylinder bore.) High quality aftermarket. Replaces Kohler part # 52 874 20-S. $75.00 each, plus shipping & handling. Discontinued from Kohler. L
NOTE: High-quality ring sets, pistons and piston/rings assemblies are also available for other makes and models of small gas engines. And the piston assemblies that's offered here will work with a stock connecting rod and crankshaft without the need for rebalancing. And always match a billet connecting rod of a certain length to an aftermarket piston (Arias, JE, etc.) that has the correct compression height. These two parts must be matched for the piston to come flush with the top of the engine block, or have a few thousands of an inch pop-out. If using a Kohler connecting rod, the compression height may not be correct with an aftermarket piston (Arias, JE, etc.) that has the wrong wrist pin offset. The same is true with a Kohler piston and a billet connecting rod of a the wrong length. You can find piston ring compressors on eBay.
NOTE: Complete engine rebuild kits are available, but a kit will cost more than if the parts were purchased separately. So please contact A-1 Miller's with a list of parts you need, and I'll get back to you with a total amount including shipping & handling. And if you need a part or parts that's not listed here or for other make and model of engines. Please contact A-1 Miller's and I'll see if I can get it at a reasonable price. Please contact A-1 Miller's if you're interested in any of the above È parts or items.

New and Used OEM and Aftermarket Replacement Connecting Rods - | Please contact A-1 Miller's if you're interested in any of these parts or services.
IMPORTANT! Upon installation of a connecting rod in a Kohler engine, the oil hole in the cap face toward the camshaft! There's "match marks" on both the rod and rod cap. They MUST be aligned or "matched up" so the big end of the rod forms a perfect circle around the crank journal when installed. Otherwise, if the cap is installed backwards, the "perfect circle" will be oblong or "egg-shaped," which will bind on the crank journal. And DO NOT over-tighten the rod bolts or nuts! If the threads strip out in a rod, then perhaps a longer grade 8 fine thread bolt can be installed in reverse to serve as a stud (the rod will need to be machined for head bolt clearance) and use a grade 8 nut. If this cannot be done, then the rod is scrap metal.
Connecting rods for Kohler engine models K90/K91. Not available in aftermarket. L NOTE: Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is started for the first time, apply clean motor oil, gear oil or lubricating grease or on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size for .938" diameter crank journal. OEM Kohler part # B-220111-S. (Has numbers 220489 embossed on rod.) $57.00 each, plus shipping & handling. (New Old Stock; when available.)
  • .010" undersize for .928" diameter crank journal. OEM Kohler part # B-220111-10-S. $69.00 each, plus shipping & handling.
New connecting rods for Kohler K-series models K141, K160/K161 cast iron block flathead engines. These are plain aluminum bearing surface rods. Replaceable bearing inserts are not available for these particular rods. 230519 embossed in beam section on OEM Kohler rods. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground so it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply clean motor oil, gear oil or lubricating grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size for 1.1875" diameter crank journal.
    • High quality aftermarket. $46.00 each, plus shipping & handling.
    • OEM Kohler part # B-230039-S. $103.70 each, plus shipping & handling.
  • .010" undersize for 1.1775" diameter crank journal. Crank journal must be reground .010" undersize to match this rod.
    • High quality aftermarket. $46.00 each, plus shipping & handling.
    • OEM Kohler part # B-230039-10-S. $78.10 each, plus shipping & handling.
New connecting rods for Kohler K-series and Magnum models K181 and M8 cast iron block flathead engines. These are plain aluminum bearing surface rods. Replaceable bearing inserts are not available for these particular rods. NOTE - The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply clean motor oil, gear oil or lubricating grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size for 1.1875" diameter crank journal. For "old style" K-series cast piston with wide wrist pin hole.
    • High quality aftermarket. $37.00 each, plus shipping & handling.
    • OEM Kohler part # 41 067 10-S. $66.10 each, plus shipping & handling.
  • .010" undersize for 1.1775" diameter crank journal. For "old style" K-series cast piston with wide wrist pin hole. Crank journal must be reground .010" undersize to match this rod.
    • High quality aftermarket. $37.00 each, plus shipping & handling.
    • OEM Kohler part # 41 067 11-S. $84.30 each, plus shipping & handling.
  • For "new style" Mahle (Magnum) forged piston with wide wrist pin hole. (Strong rods.) Not available in aftermarket. L
    • STD size for 1.1875" diameter crank journal. OEM Kohler part # 41 067 08-S. $91.20 each, plus shipping & handling.
    • .010" undersize for 1.1775" diameter crank journal. OEM Kohler part # 41 067 09-S. $91.20 each, plus shipping & handling.
New connecting rods for Kohler K-series and Magnum engine models K241/M10. Strong rods. Comes with long dipper. 5.558" length. NOTE - These rods can be bored for installation of bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply clean motor oil, gear oil or lubricating grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Machine Shop Service - Bore YOUR burnt or scored rod and install replaceable undersize bearing inserts for better engine protection. No need to purchase a new rod. $50.00 for labor and bearing inserts, plus return shipping & handling.
  • STD size for 1.500" diameter crank journal.
    • High quality aftermarket. Replaces Kohler part # 47 067 13-S. Has long integrated dipper for deep oil pan; cut half off for narrow, flat bottom oil pan. $28.00 each, plus shipping & handling.
    • OEM Kohler part # 47 067 11-S. Has short integrated dipper for narrow, flat bottom oil pan. $124.15 each, plus shipping & handling.
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) High quality aftermarket. Has long integrated dipper for deep oil pan; cut half off for narrow, flat bottom oil pan. Crank journal must be reground .010" undersize to match this rod. Discontinued from Kohler. Replaces Kohler part # 47 067 12-S. $35.00 each, plus shipping & handling.
  • .020" undersize for 1.480" diameter crank journal. Irrelevant Kohler part number. Has long integrated dipper for deep oil pan; cut half off for narrow, flat bottom oil pan. NOTE: Crank journal must be reground .020" undersize to match this rod. $48.00 each, plus shipping & handling.
New connecting rods for Kohler K-series and Magnum models K301/M12 and K321/M14 cast iron block flathead engines. Comes with long dipper. 5.3" length. NOTE - These rods can be bored for installation of bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply clean motor oil, gear oil or lubricating grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Machine Shop Service - Bore YOUR burnt or scored rod and install replaceable undersize bearing inserts for better engine protection. No need to purchase a new rod. $50.00 for labor and bearing inserts, plus return shipping & handling.
  • STD size for 1.500" diameter crank journal.
    • High quality aftermarket. For "old style" K-series cast piston with wide wrist pin hole. Discontinued from Kohler. Replaces Kohler part # 47 067 09-S. $28.00 each, plus shipping & handling.
    • High quality aftermarket. Same as above except wrist pin hole machined narrow for "new style" Mahle (Magnum) forged piston. $48.00 each, plus shipping & handling.
    • Magnum and K-series "new style" rod. This particular forged rod has a thicker beam section, which makes it just as strong as a billet rod, and with bearing inserts installed, it's suitable for high RPM and wide open throttle engine operation. And when used with a factory type piston with a thin-wall wrist pin, the rotating assembly will not need to be rebalanced. OEM Kohler part # 45 067 24-S. $118.55 each, plus shipping & handling.
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) Crank journal must be reground .010" undersize to match these rods.
    • High quality aftermarket. For "old style" K-series cast piston with wide wrist pin hole. Discontinued from Kohler. Replaces Kohler part # 47 067 10-S. $36.00 each, plus shipping & handling.
    • High quality aftermarket. Same as above except wrist pin hole machined narrow for "new style" Mahle (Magnum) forged piston. $56.00 each, plus shipping & handling.
    • Magnum and K-series "new style" rod. This particular forged rod has a thicker beam section, which makes it just as strong as a billet rod, and with bearing inserts installed, it's suitable for high RPM and wide open throttle engine operation. And when used with a factory type piston with a thin-wall wrist pin, the rotating assembly will not need to be rebalanced. OEM Kohler part # 45 067 25-S. $165.55 each, plus shipping & handling.
  • .020" undersize for 1.480" diameter crank journal. Irrelevant Kohler part number.
    • High quality aftermarket. For "old style" K-series cast piston with wide wrist pin hole. $48.00 each, plus shipping & handling.
    • High quality aftermarket. Wrist pin hole machined narrow for "new style" Mahle (Magnum) forged piston. $58.00 each, plus shipping & handling.
New connecting rods for Kohler K-series and Magnum K341/M16 cast iron block engines. These rods have a narrow wrist pin hole. Comes with long dipper. 5.3" length. NOTE - All 16hp rods, K-series or Magnum, have a narrow wrist pin hole. Also, these rods can be bored for installation of bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is ran for the first time, apply clean motor oil, gear oil or lubricating grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Machine Shop Service - Bore YOUR burnt or scored rod and install replaceable undersize bearing inserts for better engine protection. No need to purchase a new rod. $50.00 for labor and bearing inserts, plus return shipping & handling.
  • STD size for 1.500" diameter crank journal.
    • High quality aftermarket K-series rod. Discontinued from Kohler. Replaces Kohler part # 45 067 22-S. $48.00 each, plus shipping & handling.
    • Magnum and K-series "new style" rod. This particular forged rod has a thicker beam section, which makes it just as strong as a billet rod, and with bearing inserts installed, it's suitable for high RPM and wide open throttle engine operation. And when used with a factory type piston with a thin-wall wrist pin, the rotating assembly will not need to be rebalanced. OEM Kohler part # 45 067 24-S. $118.55 each, plus shipping & handling. Return To Previous Paragraph È
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) Crank journal must be reground .010" undersize to match these rods.
    • High quality aftermarket K-series rod. Discontinued from Kohler. Replaces Kohler part # 45 067 23-S. $56.00 each, plus shipping & handling.
    • Magnum and K-series "new style" rod. This particular forged rod has a thicker beam section, which makes it just as strong as a billet rod, and with bearing inserts installed, it's suitable for high RPM and wide open throttle engine operation. And when used with a factory type piston, the rotating assembly will not need to be rebalanced. OEM Kohler part # 45 067 25-S. $143.60 each, plus shipping & handling.
  • .020" undersize for 1.480" diameter crank journal. Irrelevant Kohler part number. $58.00 each, plus shipping & handling.
ALCOA connecting rods for Kohler K-series engine model K361. Also fits the K301/M12, K321/M14 and K341/M16 engines. Extremely strong rods. These rods have a narrow wrist pin hole for the Mahle (Magnum), K341 and K361 pistons. Comes with long dipper. 5.3" length. NOTE: These rods can be bored for installation of STD size, .010", .020",or .030" undersize bearing inserts, and crank journal must be reground to match diameter of undersize bearing inserts. Crank journal must be reground .010" undersize to match this rod. The alternative to using an undersize rod is if a STD size or .010" undersize rod is in good condition, if the matching-size crank journal isn't deeply scored and/or badly burnt, it can be reground until it's perfectly round again and then if the original rod also isn't deeply scored and/or badly burnt, it can be resized to fit to odd-size undersize journal with the factory recommended .0025" oil clearance. Bearing inserts cannot be used. NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. IMPORTANT: To prevent scoring of the rod when the engine is started for the first time, apply clean motor oil, gear oil or lubricating grease on crank journal before installing rod. This will better protect the parts until crankcase oil reaches them. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • A-1 Miller's Machine Shop Service - Bore YOUR burnt or scored rod and install replaceable undersize bearing inserts for better engine protection. No need to purchase a new rod. $50.00 for labor and bearing inserts, plus return shipping & handling..
  • STD size for 1.500" diameter crank journal. OEM Kohler part # 45 067 15-S. $125.00 each, plus shipping & handling. (New Old Stock; when available.)
  • .010" undersize for 1.490" diameter crank journal. (Has hole drilled through beam section.) New. Crank journal must be reground .010" undersize to match this rod. OEM Kohler part # 45 067 17-S. $258.55 each, plus shipping & handling.
New connecting rods for Kohler KT-series and Magnum engine models MV16, KT17, KT17 Series II, M18, MV18 with a wrist pin hole diameter of .625" and STD crank journal diameter of 1.3733"/1.3738". Bearing inserts are not available for these rods. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • STD size rod. Fits 1.3733"-1.3738" diameter crank journal.
    • High quality aftermarket. $50.00 each, plus shipping & handling.
    • OEM Kohler part # 52 067 67-S. $119.70 each, plus shipping & handling.
  • .010" undersize rod. Fits 1.3633"-1.3638" diameter crank journal. Crank journals must be reground .010" undersize to match this rod.
    • High quality aftermarket. $50.00 each, plus shipping & handling.
    • OEM Kohler part # 52 067 68-S. $150.00 each, plus shipping & handling.
  • .020" undersize rod. Fits 1.3533"-1.3538" diameter crank journal. Crank journals must be reground .020" undersize to match this rod. High quality aftermarket. $75.00 each, plus shipping & handling.


New connecting rod for Kohler KT-series and Magnum engine models KT19 Series II, M20 and MV20 with a wrist pin hole diameter of .750" and STD crank journal diameter of 1.4993"-1.4998". IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • A-1 Miller's Machine Shop Service - Bore YOUR burnt or scored rod(s) and install replaceable STD size, .010", .020", .030" (hard to find now) or resizable .060" undersize bearing inserts for better engine protection. No need to purchase a new rod. $50.00 for labor and bearing inserts, plus return shipping & handling.
  • STD size rod. Fits 1.4993"-1.4998" diameter crank journal. High quality aftermarket. Discontinued from Kohler. Replaces Kohler part # 52 067 71-S. $75.00 each, plus shipping & handling.
  • .010" undersize rod. Fits 1.4893"-1.4898" diameter crank journal. Crank journal must be reground .010" undersize to match this rod. High quality aftermarket. Discontinued from Kohler. Replaces Kohler part # 52 067 72-S. $75.00 each, plus shipping & handling.
  • .020" undersize rod. Fits 1.4793"-1.4798" diameter crank journal. Crank journals must be reground .020" undersize to match this rod. High quality aftermarket. $75.00 each, plus shipping & handling.
New OEM connecting rods for Kohler engine models K482, K532, K582 and K660/K662 are no longer available. However, with the K482, K532 and K582 crankshaft rod journals reground to .010", .020" or .030" undersize, a connecting rod that has a burnt or scored bearing surface can be bored out to make room for matching .010", .020" or .030" undersize bearing inserts. The alternative to using bearing inserts in a connecting rod - if the bearing surface of a STD size or .010" undersize rod is in good condition and not badly scored or burnt, the rod journal(s) can be reground and "cleaned up" until perfectly round again, then the connecting rod can be resized (in a connecting rod honing machine) to fit or match the odd-size undersize journal with the factory recommended .0025" oil clearance. However, the maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and could eventually knock and possibly break.
  • New high quality aftermarket STD size K532 and K582 connecting rod. Replaces Kohler part #'s 48 067 12-S and 48 067 16-S. $120.00 each, plus shipping & handling.
  • New high quality aftermarket .010" undersize K532 and K582 connecting rod. Replaces Kohler part #'s 48 067 13-S and 48 067 17-S. $120.00 each, plus shipping & handling.
STD size, .010", .020" or .030" (hard to find now) undersize Replaceable Tri-Metal (Lead Alloy/Copper/Steel) Bearing Inserts in Connecting Rods for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16, K361 M20 and MV20. Rods for the before mentioned engines can be bored and notched to accept bearing inserts. Even severely burnt, scored, or rods with a mismatched cap can be bored for installation of bearing inserts. Only USA-made Clevite 77, Federal Mogul or Sealed Power bearing inserts will be installed. No low quality Chinese-made bearing inserts ever installed. All A-1 Miller machined connecting rods include ground-out notches to prevent bearing rotation in rod and drilled oil hole for proper lubrication. Please indicate diameter of crank journal for size of bearing inserts. (STD size, .010", .020", .030" or resizable .060" undersizes.) Also, rods can be center-bored for top of piston to come flush with deck, or bored .020"± offset for a .020"± piston pop-out at no extra charge.
  • Clevite 77, Federal Mogul or Sealed Power Bearing Inserts. Available in STD size, .010", .020", .030" and resizable .060" (limited quantity) undersizes. $20.00 each, plus shipping & handling.
  • Bore and notch your rod only (customer supply and install own bearing inserts): $25.00 labor, plus return shipping & handling.
  • Bore and notch your rod and install our bearing inserts: $45.00 ($20.00 for bearing inserts + $25.00 labor to bore rod), plus return shipping & handling.
  • Purchase one of our rods, bore and notch rod and install our bearing inserts: Price of rod $? + $20.00 for bearing inserts + $25.00 labor to bore rod = $? total, plus return shipping & handling.

NOTE: If a crank journal is worn beyond specs or badly scored/burnt,it will need to be reground to the next undersize to match the appropriate size bearing inserts. And if you want A-1 Miller's to bore a rod for you, please let me know if you want the bearing insert centered in the bore of the rod (5.300" rod length; piston flush with top of block), offset .020" (5.320" rod length; safe to use with a milled OEM Kohler stock head and stock head gasket) or offset .060" (5.360" rod length; use with a non-milled OEM Kohler head and stock head gasket) to pop the piston out of the cylinder (see below Ê) to raise the compression and help improve airflow within the combustion chamber for more power and torque. The bearing inserts I install in Kohler 10-16hp flatheads and 18hp OHV K361 connecting rods can be used for general lawn and garden use, stock or high RPM competition pulling engines. The rod will need to be bored exactly 1.625" for correct bearing to journal oil clearance.

NOTE: Being virtually all Kohler K241/M10 pistons come within .020"± from the top of the block, which lowers the compression ratio. (The factory made them this way for reasons unknown.) I prefer to bore the K241 10hp rods .020" offset so the piston will come flush with the top of the block. This will allow the engine to produce a little more power. It won't effect the longevity of the engine or cause any problems whatsoever. But sometimes with the .020" offset, the piston will pop out of the cylinder a few thousandths of an inch, which will still hurt nothing. And the bore can be offset .040" for a .020"± piston pop-out.

FYI - Before I machine a rod for installation of bearing inserts, I use a metal "plug" alignment tool that I fabricated to precisely align the big hole of the connecting rod with the centerline of the spindle in my milling machine. Then while the plug is in the rod, I firmly clamp the rod to the milling machine table and after leaving the big hole centered or moving the table so many thousandths of an inch offset for piston pop-out, I lock the table so it won't move in any direction while boring the rod. But for reasons unknown, sometimes the cutting tool will bore the hole in the rod slightly off-center toward one of the bolts or studs. When this happens, I simply grind a small notch on the outside of each bearing shell so they'll clear the rod bolt. I've talked to other machinists who bore Kohler rods also about this and they tell A-1 Miller's sometimes the same thing happens to their rods. But as long as the outside of the bearing shells are notched for clearance of the bolt or stud, the off-center of the bearing inserts poses no problems whatsoever.

And bearing inserts for the 10-16hp Kohler engines can be installed in Kohler engine models K482, K532 and K582 STD size connecting rods, but the crank journals would need to be reground exactly to 1.500" to match the inside diameter of the bearing inserts when installed in the rods. And for your information, STD size crank journals for the K482, K532 and K582 engines measures 1.6245".


Narrow wrist pin width on 12hp or 14hp (old style) connecting rod for use with K-series 16hp cast piston or "new style" Mahle (Magnum) forged pistons. $20.00 labor, plus return shipping & handling.

Main Crankshaft Radial Ball Bearings for Kohler K-series and Magnum cast iron block engine models K141, K160/K161 and K181. Heat treated. These are specifically designed to provide maximum performance through precise ball implement selection. Aftermarket bearing packed with fresh grease from the factory. Dimensions: 1.18" I.D. (30mm) x 2.44" (62mm) O.D. x .62" (16mm) width. See note below. NOTE: If yours have more than .005" of play due to wear, or it feels rough or "rubbles" when rotated by hand with motor oil applied, then it needs to be replaced. FYI - All ball bearings have always been made to the metric dimensions. Where applicable, the US and import manufacturers try to make them close to the inch dimensions as possible.
  • New high quality aftermarket. Our part # 150-960. Same quality as OEM Kohler part # 231625-S. $10.00 each, plus shipping & handling.
  • New OEM Kohler part # 231625-S. $55.55 each, plus shipping & handling.


8 Ball Main Crankshaft Radial Bearings for Kohler K-series and Magnum cast iron block engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Heat treated material. These are specifically designed to provide maximum performance through precise ball implement selection. Works excellent for general lawn and garden engines or high performance engines that run at high RPM or at wide open throttle. Bigger balls rotate freer and run cooler, which create less rolling resistance and friction than a bearing with smaller balls. Aftermarket bearing packed with fresh grease from the factory. Dimensions: 1.57" (40mm) I.D. x 3.54" O.D. (90mm) x .90" (23mm) width. See note below Ê. NOTE: If yours have more than .005" of play due to wear, or it feels rough or "rubbles" when rotated by hand with motor oil applied, then it needs to be replaced. FYI - All ball bearings have always been made to the metric dimensions. Where applicable, the US and import manufacturers try to make them close to the inch dimensions as possible.
  • Used and in excellent condition with very little to no wear. OEM Kohler part # 235376-S. $5.00 each, plus shipping & handling. (When available.)
  • New high quality aftermarket. Our part #150973. Same quality as OEM Kohler part # 235376-S. $22.00 each, plus shipping & handling.
  • New. OEM Kohler part # 235376-S. $116.55 each, plus shipping & handling.

NOTE: With the main bearings removed from an engine, and if all the oil is cleaned from the bearings, allowed to thoroughly dry, and when the bearings are spun by hand, and if the bearings isn't worn much or at all, they might feel "rough" and make a rattling sound. This rattling sound isn't necessarily because the bearing is worn. The noise is caused by the balls running dry on the races because there's no oil to separate them. They're simply making metal to metal contact. Try applying a small amount of motor oil to the balls/races then spin them. They should now be a lot quieter. The same thing will happen with new radial ball bearings. By the way - Most main bearings in a Kohler engine will wear extremely little, if any at all, and usually don't require replacing. Although some main bearings will wear (which is obvious), and need to be replaced. And excessively worn main bearings will make a rumbling noise and the engine will have a more than-usual-vibration.

Crankshaft Main Bearings (Flanged Sleeve Bushings) for Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18 MV18, M20 and MV20. NOTE: On these engines, one main journal can be reground undersize if it's worn beyond specifications (mostly likely the PTO end), and if the other is within specifications (most likely the flywheel end), it can remain STD size. Not available in aftermarket. L
  • STD size. (1.7407") OEM Kohler part # 52 030 10-S. $77.45 each, plus shipping & handling.
  • .010" undersize. (1.7307") OEM Kohler part # 52 030 11-S. $154.40 each, plus shipping & handling.
  • .020" undersize. (1.7207") OEM Kohler part # 52 030 12-S. $154.40 each, plus shipping & handling.
Crankshaft Main Bearings (Sleeve Bushings) for Kohler opposed (flathead) twin cylinder engine models K482, K532 and K582. Not available in aftermarket. L
  • STD size. OEM Kohler part # 48 030 06-S. $71.30 each, plus shipping & handling.
  • .010" undersize. OEM Kohler part # 48 030 07-S. $161.65 each, plus shipping & handling.
  • .020" undersize. OEM Kohler part # 48 030 05-S. $123.15 each, plus shipping & handling.

Flywheel End Camshaft Bushing (Bearing) for Kohler twin cylinder engine models K482, K532 and K582. NOTE: Bearing for the PTO end (part # 277039-S) is no longer available from Kohler and not available in aftermarket. L
  • OEM Kohler part # 48 158 03-S. $24.35 each, plus shipping & handling.
More parts to be added later. If you need something that's not listed here, please contact A-1 Miller's and we'll see if I can get it at a reasonable price. Please contact A-1 Miller's if you're interested in any of the above È parts or items.

Valves and Valve Guides - | Please contact A-1 Miller's if you're interested in any of these parts or services.
Valves for Kohler engine models KT90/KT91. Head diameter: 15/16". Not available in aftermarket. L
  • Intake. New Old Stock. Discontinued from Kohler. OEM Kohler part # 220008-S. $32.00 each, plus shipping & handling. (When available.)
  • Exhaust. OEM Kohler part # 220009-S. $45.05 each, plus shipping & handling.

NOTE: Before lapping in the valves, it'll be best to have the valve seats reground or cut so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


Exhaust Valves for Kohler engine models K141, K160/K161 and K181/M8. Dimensions: head diameter: 1-1/8"; overall length: 4.056"; stem diameter: .309"; 45º face angle.

  • High quality aftermarket ordinary long lasting exhaust valve. $20.00 each, plus shipping & handling.
  • OEM Kohler ordinary long lasting exhaust valve, part # 230710-S. $41.56 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; maintains valve to stem clearance longer), part # 230027-S. $87.36 each, plus shipping & handling.
  • Reground Exhaust Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)


Intake Valves for Kohler engine models K141, K160/K161 and K181/M8. Dimensions: head diameter: 1-3/8"; overall length: 4.065"; stem diameter: .309"; 45º face angle.

  • Reground ordinary long lasting intake valve. In excellent reusable condition. Discontinued from Kohler. OEM Kohler part # 230008-S. $25.00 each, plus shipping & handling. (When available.)
  • OEM Kohler Stellite intake valve (extremely hard and long lasting material; maintains valve to stem clearance longer), part # 230582-S. $86.23 each, plus shipping & handling.
  • Reground Intake Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • Grind 30º angle on intake valve face to improve engine performance or for high performance use. (Seat must be recut or reground at a 31º angle to match angle on valve face.) $5.00 extra.


5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $15.00 each, plus shipping & handling.


NOTE: Before lapping in valves, it'll be best to have the valve seats reground or cut so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


1-1/8" Diameter Exhaust Valves for Kohler engine models K241/M10, K301/M12, early K321's, K482, K532 and K582. Dimensions - Head diameter: 1-1/8"; Length: 4.656"; Stem diameter: .309"; Face angle: 45º.

  • High quality aftermarket ordinary long lasting exhaust valve. Replaces Kohler part # 235826-S. $16.00 each, plus shipping & handling.
  • OEM Kohler ordinary long lasting exhaust valve, part # 235826-S. $41.56 each, plus shipping & handling.
  • High quality aftermarket Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer). Replaces Kohler part # 235838-S. $26.00 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer), part # 235838-S. $67.09 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer), part # 48 016 01-S. $79.12 each, plus shipping & handling.
  • Reground Exhaust Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)


1-3/8" Diameter Intake Valves for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16, K482, K532 and K582. Dimensions - Head diameter: 1-3/8"; Length: 4.640"; Stem diameter: .3095"; Face angle: 45º.

  • High quality aftermarket ordinary long lasting intake valve. Replaces Kohler part # 235008-S. $26.00 each, plus shipping & handling.
  • High quality aftermarket Stellite intake valve (extremely hard and long lasting material; maintains valve to stem clearance longer). Replaces Kohler part # 235582-S. $26.00 each, plus shipping & handling.
  • OEM Kohler ordinary long lasting intake valve, part # 235008-S. $47.48 each, plus shipping & handling.
  • OEM Kohler Stellite intake valve (extremely hard and long lasting material; maintains valve to stem clearance longer), part # 235582-S. $95.63 each, plus shipping & handling.
  • Reground Intake Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • Grind 30º angle on intake valve face to improve engine performance or for high performance use. (Seat must be recut or reground at a 31º angle to match angle on valve face.) $5.00 extra.


1-3/8" Diameter Exhaust Valves for later model K321's/M14 (suffix "D" and later), K341/M16, K532 and K582 (for K582 after serial # 9165450). Dimensions - Head diameter: 1.373; Length: 4.639; Stem diameter: .3075; Face Angle: 45º.

  • High quality aftermarket Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer). Replaces Kohler part # 237672-S. $26.00 each, plus shipping & handling.
  • OEM Kohler Stellite exhaust valve (extremely hard and long lasting material; less prone to wear, burning, and maintains valve to stem clearance longer), part # 237672-S. $67.09 each, plus shipping & handling.
  • Reground Exhaust Valve, used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)

NOTE: Before lapping in the valves, it's best to have the valve seats recut or reground so they'll be in correct alignment with the centerline of the valve guides and so the valve face will make a full 360º contact with the seat, or the valves will leak and the engine will lose compression, be hard to start, be low on power and possibly make a popping sound through the carburetor or out the exhaust. And be sure to set the clearances correctly, too.


Oversize Valves for High RPM Kohler Pulling Engines. Each can be used as intake valve for Kohler 10-16hp pulling engines, or as exhaust valve (with a 20%± bigger intake valve). Each has a 45º face angle for a 46º seat, but can be reground to 30º to match a 31º seat. OEM Kohler valve keepers/locks/collets and retainers can be used with these valves.

  • 1.500" High Alloy Steel Valve. .3115" stem diameter; requires 8mm reamer to enlarge guide. NOTE: If engine block has an OEM valve seat insert, remove the insert, and cut or grind the [31º or 46º] seat angle for this valve to sit directly into the cast iron block without enlarging the counterbore. $50.00 each, plus shipping & handling.
  • 1.600" High Alloy Lightweight Steel Valve. .311" (5/16") stem diameter. $20.00 each, plus shipping & handling.
  • 1.625" High Alloy Lightweight Steel Valve. .311" (5/16") stem diameter. $20.00 each, plus shipping & handling.
  • 1.720" High Alloy Lightweight Steel Valve. 8mm stem diameter; requires 8mm reamer to enlarge guide. $20.00 each, plus shipping & handling.
  • 1.910" High Alloy Lightweight Steel Valve. Can be used with .085" offset bronze valve guide. .312" stem diameter; requires 8mm reamer to enlarge guide. $50.00 each, plus shipping & handling.
  • 1.920" High Alloy Lightweight Steel Valve. Can be used with .085" offset bronze valve guide. .312" stem diameter; requires 8mm reamer to enlarge guide. $50.00 each, plus shipping & handling.
  • 1.940" Titanium Valve. Can be used with .085" offset bronze valve guide. .311" (5/16") stem diameter. $85.00 each, plus shipping & handling.


5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $15.00 each, plus shipping & handling.

8mm (.315") Chucking Reamer. Use to enlarge valve guides for installation of oversize or aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19, KT19 Series II, M20 and MV20, or 1.720" oversize valve in 10-16hp Kohler engines. $15.00 each, plus shipping & handling.


High Quality Aftermarket K361 Valve. Can be used as intake or exhaust valve. Heat-treated, hardened steel. Dimensions: head diameter: 1.437"; overall length: 4.165"±; face angle: 45º. Has 8mm chrome-plated stem. Requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainer or rotator can be used with this valve. OEM valve discontinued from Kohler. Replaces Kohler part #'s 45 016 02-S (intake) and 45 017 01-S (exhaust).

  • Machined by A-1 Miller's. $50.00 each, plus shipping & handling.


8mm Chucking Reamer. Use to enlarge valve guides for installation of aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19, KT19 Series II, M20 and MV20, or 1.720" oversize valve in 10-16hp Kohler engines. $15.00 each, plus shipping & handling.

NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so the angle will be in correct alignment with the centerline of the valve guides and so the valve face will make a full 360º contact with the seat, or the valves will leak and the engine will lose compression, be hard to start, be low on power and possibly make a popping sound through the carburetor or out the exhaust. And be sure to set the clearances correctly, too.


Intake Valves for Kohler engine models KT17, KT17 Series II, MV16, M18 and MV18. Discontinued from Kohler. Replaces Kohler part #'s 52 016 05-S (listed for M18, MV18), 52 017 01-S (listed for KT17), 52 017 02-S (listed for KT17), 52 017 03-S (listed for KT17), 52 017 05-S (listed for KT17), 52 017 07-S (listed for MV16, M18) and 52 017-08-S (listed for MV16, M18). Overall length: 3.641".

  • A-1 Miller's High Quality Aftermarket Intake Valve. Fits Kohler engine models KT17, KT17 Series II, MV16, M18 and MV18. 45º face angle, 8mm diameter stem; requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainers can be used with this valve. $30.00 each, plus shipping & handling.
  • High Quality "Made in China" Kohler-Replicated Intake Valve. Fits Kohler engine models KT17, KT17 Series II, MV16, M18 and MV18. 45º face angle for engines with serial number 1816500646 and earlier. 5/16" diameter stem. $30.00 each, plus shipping & handling.

Exhaust Valves for Kohler engine models KT17, KT17 Series II, MV16, M18 and MV18. Dimensions: head diameter: 1.373"; overall length: 3.641"; stem diameter: .3075".

  • High Quality Kohler-Replicated "Made in China" Exhaust Valve. Has a 30º face angle for engines after serial number 1917809286. 5/16" diameter stem. Replaces Kohler part # 52 016 05-S. $30.00 each, plus shipping & handling.
  • OEM Kohler Exhaust Valve for Kohler engine models M18 and MV18. Has a 30º face angle for engines after serial number 1917809286. OEM Kohler part # 52 016 05-S. $62.70 each, plus shipping & handling.


Intake Valves for Kohler engine models KT19, KT19 Series II, M20 and MV20. Discontinued from Kohler. Replaces Kohler part #'s 52 016 02-S, 52 017 03 (listed for KT19), 52 017 07-S, 52 017 08-S. Overall length: 3.926".

  • A-1 Miller's High Quality Aftermarket Intake Valve. Fits Kohler engine models KT19, KT19 Series II, and early M20 and MV20. 45º face angle. This valve can be used for the intake or exhaust to match a 46º seat, if desired. Has an 8mm diameter stem; requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainers can be used with this valve. $30.00 each, plus shipping & handling.
  • High Quality Kohler-Replicated "Made in China" Intake Valve. Fits Kohler engine models M20 and MV20. 30º valve face; 5/16" diameter stem. $30.00 each, plus shipping & handling.

Exhaust Valves for Kohler engine models KT19, KT19 Series II, M20 and MV20. Discontinued from Kohler. Replaces Kohler part #'s 52 016 02-S, 52 017 03, 52 017 07-S, 52 017 08-S. Overall length: 3.926".

  • A-1 Miller's High Quality Aftermarket Exhaust Valve. Fits Kohler engine models KT19, KT19 series II, and early M20 and MV20. 45º face angle; 8mm diameter stem; requires 8mm reamer to enlarge guide. $30.00 each, plus shipping & handling.
  • High Quality Kohler-Replicated "Made in China" Exhaust Valve. Fits Kohler engine models M20 and MV20 with serial number 1917809296 and above. 30º face angle; 5/16" diameter stem. Replaces Kohler part # 52 017 07-S. $30.00 each, plus shipping & handling.


8mm Chucking Reamer. Use to enlarge valve guides for installation of aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19, KT19 Series II, M20 and MV20, or 1.720" oversize valve in 10-16hp Kohler engines. $15.00 each, plus shipping & handling.

NOTE: Before lapping in the valves, it'll be best to have the valve seats recut or reground so they'll be in correct alignment with the centerline of the valve guides. Otherwise, the valves may not make a full 360º contact with the seats, and the engine will lose compression, be hard to start, lose power and possibly make a popping sound through the carburetor or out the exhaust. And be sure to set the clearances correctly, too. And if the end of the valve stem is accidentally ground too short, it can be made long again by building up welding with a MIG or TIG welder, then ground to the correct valve clearance.


Valve Lapping Tools. Use either tool to rotate valve in seat by hand with valve grinding compound (which can be purchased online and at virtually any auto parts store) to create slightly rough surface on valve face and seat so valves will wear into seats, forming a perfect seal.

  • Valve Lapping Tool for Smaller Valves. Has 19/32" and 25/32" diameter rubber cups. $6.00 each, plus shipping & handling.
  • Valve Lapping Tool for Bigger Valves. Has 1-7/64" and 1-3/8" diameter rubber cups. $8.00 each, plus shipping & handling.


è New valves for other makes and models of small engines are also available.

Valve Guides FYI -(FYI - All valve guides are made of either cast iron or bronze, not steel. Cast iron and bronze are very hard and porous metals. They absorb oil and lubricate the valve stems for longer wear.) [Return to Previous Section, Paragraph or Website]


Stock (centered) Cast Iron Valve Guides for Kohler engine models K141, K160/K161 and K181/M8. Dimensions: .310" I.D. x .5645" O.D. x 1.686" overall length. NOTE: Use my valve guide removal and installation tool to remove and install valve guides. After installation and for correct valve stem clearance, guide may need to be enlarged with a 5/16" reamer Ê. And before installing valve, apply clean motor oil, gear oil or lubricating grease on valve stem to provide lubrication of the guide and stem.

  • High quality aftermarket. $20.00 each, plus shipping & handling.
  • OEM Kohler part # 230007-S. $17.75 each, plus shipping & handling.
  • NOTE: The alternative to installing new replacement valve guides is to have the old [worn] valves reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


Stock (centered) Cast Iron Valve Guides for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16, K482, K532 and K582. Dimensions: .310" I.D. x .629" O.D. x 2.135" overall length. NOTE: Use my valve guide removal and installation tool to remove and install valve guides. After installation and for correct valve stem clearance, guide may need to be enlarged with a 5/16" reamer Ê. And before installing valve, apply clean motor oil, gear oil or lubricating grease on valve stem to provide lubrication of the guide and stem. Discontinued from Kohler. Replaces Kohler part # 235007-S.

  • High quality aftermarket. $18.00 each, plus shipping & handling.
  • NOTE: The alternative to installing new replacement valve guides is to have the old [worn] valves reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


Valve Guides for Kohler engine model K361 cylinder head.

  • Intake Valve Guide. New Old Stock. Discontinued from Kohler. OEM Kohler part # 45 316 02-S. $20.00 each, plus shipping & handling. (When available. Not available in aftermarket. L)
  • Exhaust Valve Guide and Seal Kit. OEM Kohler part # 45 755 11-S. $58.70 per kit, plus shipping & handling.
  • NOTE: The alternative to installing new replacement valve guides is to have the old [worn] valves reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


Stock (centered) Cast Iron Valve Guides for Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. Discontinued from Kohler. Replaces Kohler part # 52 316 08-S. NOTE: Use my valve guide removal and installation tool to remove and install valve guides. After installation and for correct valve stem clearance, guide may need to be enlarged with a 5/16" reamer Ê. And before installing valve, apply clean motor oil, gear oil or lubricating grease on valve stem to provide lubrication of the guide and stem. To replace the valve guides in Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 or MV20 with the engine fully assembled and cylinders fastened to the crankcase, first remove the springs, retainers and valves, and break off the protruding end of the guide in the valve spring compartment with a cold chisel and hammer, then drive out the remaining portion of the guide into the spring compartment. But with the cylinders off the crankcase, just drive the guides out without breaking them off first. Install new guides by driving them in until flush with the surface of the port. Then ream the guides so the valve stems will have proper clearance.

  • High quality aftermarket. Valve Guide for Exhaust Valve. Outside diameter same entire length of the guide. Dimensions: .310" I.D. x .5645" O.D. x 1.378" overall length. Machined by A-1 Miller. $15.00 each, plus shipping & handling.
  • High quality aftermarket. Valve Guide for Intake Valve. Has machined step (partial reduced O.D.) for installation of valve stem seal (below Ê). (Valve stem seal required to prevent crankcase oil from being suctioned into the combustion chamber through the guide.) Dimensions: .310" I.D. x .5645" O.D. x .500" reduced O.D. (for seal) x 1.378" overall length. Machined by A-1 Miller. $20.00 each, plus shipping & handling.

NOTE: The alternative to installing new replacement OEM-type valve guides is to have the old [worn] guides reamed for installation of thin-wall bronze sleeves/liners (bushings), which can be installed by a reputable automotive machine shop. Bronze valve guide sleeves/liners are a low-cost alternative to replacing the entire guide in most engines. Bronze also last longer than cast iron guides because bronze is harder material and it retains more oil for better lubrication of the valve stem.


High Quality, High Speed Steel 5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $15.00 each, plus shipping & handling.
Valve Guide Removal and Installation Tool for use with virtually all flathead block Kohler engines. IMPORTANT: The engine block could crack if guides are removed or installed with a hydraulic press! Therefore, it's best to use a big, heavy hammer to drive out the old guide into the valve spring chamber and use the same hammer to install the new guide from inside the valve pocket. Install new guides until flush with the port. Tool can be used for OEM Kohler and aftermarket offset valve guides. Dimensions: .300" pilot x 1/2" diameter x 5" overall length.
High Quality, High Speed Steel Chucking Reamers. Precision ground to provide correct stem to guide clearance. Will not allow valve stem to be too loose or too tight in guide. When reaming guide, use an electric hand drill with plenty of oil in guide. Before installing valve, apply motor oil on stem for lubrication to reduce wear to guide and prevent valve from sticking. [Return to Previous Section, Paragraph or Website]
  • 5/16" (.3125") Chucking Reamer. Use to clean carbon deposits from used valve guides or enlarge new guides for a 5/16" valve stem in flathead 7hp+ B&S, Kohler, 8hp+ Tecumseh, etc. engines. $15.00 each, plus shipping & handling.
  • 8mm Chucking Reamer. Use to enlarge valve guides for installation of aftermarket valves with an 8mm valve stem in Kohler engine models K361, KT19, KT19 Series II, M20 and MV20, or 1.72" oversize valve in 10-16hp Kohler engines. $15.00 each, plus shipping & handling.
  • 11/32" (.3438") Chucking Reamer. Use to enlarge guides for installation of small block Chevy V8 valves in Kohler pulling engines. $12.50 each, plus shipping & handling.
Valve Stem Seals. Required to prevent crankcase oil from draining down into (OHV) or being suctioned into (flatheads) the combustion chamber through the guide. Silicone rubber w/metal clamp. NOTE: Apply clean motor oil, gear oil or lubricating grease on valve stem before inserting valve through seal to provide lubrication of the stem, guide and seal. Dimensions: 5/16" I.D. (stem) x .500" I.D. (guide) x .600" O.D. NOTE: Some early production KT17 models do not use valve stem seals.
  • High quality aftermarket. Fits Kohler engine models K361, MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. Replaces Kohler part # 52 032 13-S. $4.00 each, plus shipping & handling.
  • Fits Kohler engine models K361, MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. OEM Kohler part # 52 032 13-S. $22.40 each, plus shipping & handling. [Return to Previous Section, Paragraph or Website]

OEM, Performance, High-Performance Camshafts, Valve Springs and Retainers, Rotators and Keepers
New-Style One-Piece Camshafts for Kohler engine models K141, K160/K161, K181 and Magnum M8. With ground points lobe and ACR. IMPORTANT: To prevent seizing of the camshaft when the engine is ran for the first time, apply clean motor oil, gear oil or lubricating grease on cam pin before installing cam. This will better protect the parts until crankcase oil reaches them. When reusing lifters, roughen lifter faces with 600 grit sandpaper to produce a new wear pattern and so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. And the K141, K160 and K161 cams can't be used in the K181 engine due to its longer stroke. ACR = automatic compression release. FYI: Being the automatic compression release (ACR) [hair-like] spring (part number 47 089 01-S) is no longer available from Kohler or in aftermarket, if yours places little or weak pressure against the flyweights, it can be re-bent to its original shape to place sufficient tension against the flyweights. I do this all the time and it works great. It's became regular practice with me. OEM Kohler part #'s 41 010 05-S.
  • Used and in excellent condition. Points lobe, lifter lobes, gear teeth and ACR are all in good condition. $80.00 each, plus shipping & handling. (When available.)
  • New. $190.30 each, plus shipping & handling.

Camshafts for Kohler Magnum engine model M8, can also be used in the K-series K141, K160/K161, K181 engines with solid state ignition. No points lobe. With ACR. IMPORTANT: To prevent seizing of camshaft on pin when engine is ran for the first time, apply plenty of motor oil on cam pin and inside cam before installing cam in engine. This will better protect the parts until crankcase oil reaches them. FYI: Being the automatic compression release (ACR) [hair-like] spring (part number 47 089 01-S) is no longer available from Kohler or in aftermarket, if yours places little or weak pressure against the flyweights, it can be re-bent to its original shape to place sufficient tension against the flyweights. I do this all the time and it works great. It's became regular practice with me. OEM Kohler part # 41 010 07-S.

  • Used and in excellent condition. Lifter lobes, gear teeth and ACR are all in good condition. $55.00 each, plus shipping & handling. (When available.)
  • New. $109.70 each, plus shipping & handling.

High performance camshafts for a Kohler K181 or M8 engine are available from Vogel Manufacturing Co. at: http://www.vogelmanufacturing.com.

New-Style, One-Piece Camshafts for Kohler K-series or Magnum engine models K241/M10, K301/M12, K321/M14 or K341/M16. New-style, one-piece K-series camshafts with ACR. Can be used in a K-series engine as an upgrade from the older two-piece camshaft. IMPORTANT: To prevent seizing of camshaft on pin when engine is ran for the first time, apply plenty of motor oil on cam pin and inside cam before installing cam in engine. This will better protect the parts until crankcase oil reaches them. When reusing lifters, roughen lifter faces with 600 grit sandpaper to produce a new wear pattern and so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. And the lobes on the used cams have not been reground for performance.
  • Used K-series Camshaft. Points lobe, lifter lobes, gear teeth and ACR are all in good condition. Discontinued from Kohler. OEM Kohler part # 47 010 09-S. $75.00 each, plus shipping & handling. (When available.)
  • New K-series (or Magnum) Camshaft. (Has slightly more duration than cam below Ê.) OEM Kohler part # 45 010 06-S. $193.40 each, plus shipping & handling.
  • New K-series (or Magnum) Camshaft. (Has slightly less duration than cam above È.) OEM Kohler part # 47 010 06-S. $208.20 each, plus shipping & handling.
  • Used Magnum Camshaft. (No points lobe.) Lifter lobes, gear teeth and ACR are all in good condition. Discontinued from Kohler. OEM Kohler part # 47 010 11-S. $65.00 each, plus shipping & handling. (When available.)

Duplicate of the OEM Kohler K361 18hp OHV (Over Head Valve) Cam for Kohler Engines -

When used in Kohler flathead engine models K241/M10, K301/M12, K321/M14 or K341/M16, this particular cam profile design provides more torque (lugging power) and improved engine performance. Suitable for heavy yard and garden work, or for stock competition pulling. This cam has the factory stock lift of .324" with the same duration as the stock 18hp cam, which makes it perform best at the 3,400 to 3,800 RPM range. This cam increases the compression to about 4% more at 3,600 RPM than the stock flathead engine cams. It's ideal for general lawn and garden work, snow removal and/or in a limited RPM stock competition pulling engine. Due to the low RPM range, it can be used with factory stock valve springs and retainers or rotators. No need for performance valve springs. Set the valve clearances at .010" for the intake and .014" for the exhaust. This cam is discontinued from Kohler. Replaces OEM Kohler part # 45 010 05-S. NOTE: The lobes on this cam are "reground" and not welded-up, then ground. When the lobes are reground to make more duration, during the grinding process, to retain the maximum stock lift, sometimes the base circle of the lobe will become smaller in diameter than the shaft beside the lobes. Therefore, if the shaft itself is higher on either side of the base circle of the lobe, part of the shaft next to the lobe must be ground away so the base circle will be higher than the shaft, allowing the valves to fully close. There is nothing wrong with this process. It's just the nature of reground Kohler cams. Lakota Racing and other vendors that supply reground cams may be the same.

  • $110.00 each on YOUR Kohler K241/M10, K301/M12, K321/M14 or K341/M16 camshaft core, plus return shipping & handling. NOTE: Only the one-piece camshaft (originally with the automatic compression release) will be accepted for regrinding. Cam must be in good condition, no cracks, never reground or welded on before, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact.
  • $135.00 each with acceptable core trade-in for exchange, plus shipping & handling. NOTE: Only the one-piece camshaft (originally with the automatic compression release) will be accepted as a core. Core must be in good condition, no cracks, never reground or welded on before, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact.
  • $160.00 each outright with no core trade-in, plus shipping & handling.
  • When sending a cam to A-1 Miller's, please include a note with your name, complete mailing address, phone number and a description of what you want done and a list of any other parts you may need, and we will contact you when the cam (and parts) are ready to be sent back to you. Please send to: A-1 Miller's Performance Enterprises, 1501 W. Old Plank Rd., Columbia, MO (Missouri) 65203-9136 USA. [Return To Previous Paragraph, Section or Website]

FYI: When the cam lobes are reground, metal is removed from the base circle which reduce the diameter of the base circle in order retain maximum lift at the highest point on the lobe. The ramps on the lobes are also "rounded" to give the cam more duration. The cam grinding machine's grinding stones are about 1" wide, and after the cam grinding process, I have to manually grind metal away from the sides of the base circles so the edge of the lifters won't "ride up" on the ungrounded areas and hold the valves slightly open when they're supposed to be fully closed. I have to do this to every reground cam I have in stock. Some cam grinders apply a phosphate conversion coating (which resembles flat or matte black paint) to the entire camshaft, especially the lobes. This coating is to prevent galling (wear) during the break-in (wear-in) period and it also covers the secondary grinding areas on each side of the base circles of the lobes so they can't be readily easily seen or noticed. Motor oil with high zinc phosphate content will also protect the cam lobes and other internal moving engine parts from wear during break-in (wear-in). Otherwise, if everything else is set up correctly with your engine, this cam should work fine. There's no need to be concerned when you receive the cam and see the metal ground away. Also, some of the cams I have, the points lobe is slightly worn. (It's hard to find a good used, 100% unworn cam nowadays.) I include a stainless steel points pushrod with a flared-end to make contact with the unworn areas of the lobe. The pushrod will need to be installed from inside the block before the cam is installed. IMPORTANT: To prevent seizing of camshaft on pin when engine is ran for the first time, apply plenty of motor oil on cam pin and inside cam before installing cam in engine. This will better protect the parts until crankcase oil reaches them.

Professionally Reground 4,000± RPM Performance Torque Cam for Kohler Engines -

For Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. This particular cam profile design provides more torque (lugging power) and improved engine performance from 3,800 to 4,200 RPM. Suitable for stock competition pulling. The lobes on this cam are not welded up. They are professionally reground to have the factory stock lift (.324"), but slightly increased duration than the 18hp RPM cam above, which makes it perform best at a slightly higher RPM range. This cam will pass tech for a stock cam. It will add about 3 more horsepower and 2 ft. lbs. of torque to an average stock engine with more lugging power than the OEM Kohler K361 cam. This cam builds up the compression about 6% more than the K361 cam, and approximately 11% more than the flathead engine cams at around 4,000 RPM. This cam sounds just like an OEM Kohler stock cam. You can't hear the difference out the exhaust. It's perfect for a competing stock pulling tractor or for heavy lawn and garden work. When used for competition pulling, this cam performs best with a set of our BLUE medium performance valve springs (below Ê), reworked and undercut stock size valves, intake and exhaust port runners made bigger, and a bored-out and reworked carburetor. A bored-out venturi and reworked carburetor is when the carburetor is modified for maximum performance for general yard and garden use, and/or for competition pulling. All these performance enhancements needs to be done to increase the airflow in and out of the combustion chamber so the engine can produce more power and torque. If there's any restriction in and out of the combustion chamber, this cam will not be able to perform at 100% efficiency, and the engine will not be able to produce as much power and torque as it is capable of. The duration and centerline of the lobes on this cam helps the engine produce the most power and torque between 3,600-4,500 RPM. At higher RPM, due to the limited duration, no substantial gain in power or torque will result. If the engine is built to the max, tractor is geared correctly and traction is adequate, engine shouldn't bog down much with this cam. It'll keep pumping out the ponies right out the gate! Use with the OEM Kohler 1" base lifters. When reusing lifters, roughen lifter faces with 600 grit sandpaper in an erratic pattern to produce a new wear pattern and so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. Use the recommended break-in oil, too. This cam installs just like the OEM Kohler cam. Just thoroughly lubricate the inside with motor oil, align the timing marks on the gear teeth, set the end-play and valve clearances at .010" for the intake and .014" for the exhaust, and it should be good to go!

  • $110.00 each on YOUR Kohler K241/M10, K301/M12, K321/M14 or K341/M16 camshaft core, plus return shipping & handling. NOTE: Only the one-piece camshaft (originally with the automatic compression release) will be accepted for regrinding. Cam must be in good condition, no cracks, never reground or welded on before, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact.
  • $135.00 each with acceptable core trade-in for exchange, plus shipping & handling. NOTE: Only the one-piece camshaft (originally with the automatic compression release) will be accepted as a core. Core must be in good condition, no cracks, never reground or welded on before, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact.
  • $160.00 each outright with no core trade-in, plus shipping & handling.
  • When sending a cam to A-1 Miller's, please include a note with your name, complete mailing address, phone number and a description of what you want done and a list of any other parts you may need, and we will contact you when the cam (and parts) are ready to be sent back to you. Please send to: A-1 Miller's Performance Enterprises, 1501 W. Old Plank Rd., Columbia, MO (Missouri) 65203-9136 USA.

FYI: When the cam lobes are reground, metal is removed from the base circle which reduce the diameter of the base circle in order retain maximum lift at the point on the lobe. The ramps on the lobes are also "rounded" to give the cam more duration. The cam grinding machine's grinding stones are about 1" wide, and after the cam grinding process, I have to manually grind metal away from the sides of the base circles so the edge of the lifters won't "ride up" on the ungrounded areas and hold the valves slightly open when they're supposed to be fully closed. I have to do this to every reground cam I have in stock. Some cam grinders apply a phosphate conversion coating (which resembles flat or matte black paint) to the entire camshaft, especially the lobes. This coating is to prevent galling (wear) during the break-in period and it also covers the secondary grinding areas on each side of the base circles of the lobes so they can't be readily easily seen or noticed. Motor oil with high zinc phosphate content will also protect the cam lobes and other internal moving engine parts from wear during break-in. Otherwise, if everything else is set up correctly with your engine, this cam should work fine. There's no need to be concerned when you receive the cam and see the metal ground away. Also, some of the cams I have, the points lobe is slightly worn. (It's hard to find a good used, 100% unworn cam nowadays.) I include a stainless steel points pushrod with a flared-end to make contact with the unworn areas of the lobe. The pushrod will need to be installed from inside the block before the cam is installed. IMPORTANT: To prevent seizing of camshaft on pin when engine is ran for the first time, apply plenty of motor oil on cam pin and inside cam before installing cam in engine. This will better protect the parts until crankcase oil reaches them.


Medium Performance (Blue) Single Valve Spring Set for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Can also be used in Kohler opposed (flathead) twin cylinder engine models KT17 Series II, KT19 Series II, M18, M20, K482, K532 and K582 for increased performance or competition pulling and with the stamped steel valve retainers below. These springs are more aggressive than OEM Kohler valve springs, but less aggressive than the red valve springs below. Suitable for competition pulling engines only; not recommended for general yard or garden use. Can be easily compressed with a small engine valve spring compressor tool. Designed for the OEM Kohler stock cam or our reground 4,000± RPM torque cam with stock lift in pulling engines running up to 5,000 RPM for quicker valve closing to prevent valve float. (Newton's third law of motion.) Valve float allows the engine to momentarily lose compression, cause fuel to spray out the carburetor and the engine will make a "hunt, hunt" sound at high RPM. As a result, the engine will lose power, and as the weight box on the sled moves forward upon on the tractor, the engine may not be able to recover. These springs can be used with stock size valves, OEM Kohler stamped steel/non-rotator retainers and keepers/locks/collets. Do not use with OEM Kohler valve rotators with these springs! Rotators are thicker, and being these performance springs are much longer (and slightly stiffer) than stock springs (that require rotators), coil bind may result at full valve lift, which could break the cam. Sold as a matched set. One spring is no stiffer than the other. Can be easily compressed with a standard small engine valve spring compressor. Same diameter as OEM Kohler springs. Dimensions: .697" I.D.; .953" O.D.; 2" uncompressed height. specifications: Seat load: 27 lbs. @ 1.650"; Open load: 70 lbs. @ 1.200"; Coil bind: .920"; Spring rate (lbs/inch): 96. Made by Comp Cams.

  • New. $10.00 per set of two, plus shipping & handling.


High Quality, High Performance, Lightweight, Hardened 4140 Chrome-Moly Steel 7º Valve Spring Retainers. Not stamped steel. 1" O.D.; use with medium- or high performance valve springs above È.
  • New. $10.00 per set of two, plus shipping & handling.

Performance Camshaft for 5,000± RPM governed Kohler Competition Pulling Engines -

Fits Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 Pulling Engines. This is a more aggressive camshaft than above È. Lobes are hard-surface welded on an OEM Kohler cast cam, then professionally precision ground to give it the stock lift (.324"-.330"), but more duration. This cast cam performs best with our BLUE medium performance valve springs (below), reworked and undercut stock size or oversize valves for more airflow, ports made larger and the venturi in the carburetor bored out. If there's any restriction in and out of the combustion chamber, the cam will not be able to perform at 100% efficiency for better engine performance. Due to the increased duration, with an open header pipe, this cam produces a peculiar "bellowing and rumbling" exhaust sound at idling speed and upon deceleration. This cam profile helps the engine produce the most power and torque at wide open throttle operation. If used in a 4,000± RPM engine, no substantial increase in power will result. Can be used with OEM Kohler 1" base lifters. When reusing lifters, roughen lifter faces with 600 grit sandpaper in an erratic pattern to produce a new wear pattern and so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. Use the recommended break-in oil, too. This cam installs just like the OEM Kohler cam. Just thoroughly lubricate the inside with motor oil, align the timing marks on the gear teeth, set the end-play and valve clearances at .010" for the intake and .014" for the exhaust, and it should be good to go! NOTE: If methanol fuel is going to be burned in the engine and the ignition timing advanced more than 25º BTDC, the automatic compression release mechanism on this cam will need to be removed and a high torque starter motor will also need to be used. Otherwise, the timing would be so far advanced, the spark will occur when the compression release opens the exhaust valve. This will cause the engine to be hard to start, if it would start at all. IMPORTANT: To prevent seizing of camshaft on pin when engine is ran for the first time, apply plenty of motor oil on cam pin and inside cam before installing cam in engine. This will better protect the parts until crankcase oil reaches them.

  • $135.00 each, plus return shipping & handling, on YOUR Kohler K241/M10, K301/M12, K321/M14 or K341/M16 camshaft to be welded up and reground for Hot-Stock or Stock-Altered wide open throttle operation: NOTE: Only the one-piece K241/M10, K301/M12, K321/M14 or K341/M16 camshafts (originally with automatic compression release) will be accepted for grinding. Older, out-dated steel cams for Kohler 10-16hp engines will also be accepted as a regrind. Cam must be in good condition, no cracks, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact. If cam has a worn lifter lobe, but rest of cam is in good condition, that will be fine because the lobe will need to be welded up (then reground) anyway.
  • $160.00 each with acceptable core trade-in for exchange, plus shipping & handling. NOTE: Only the one-piece K241/M10, K301/M12, K321/M14 or K341/M16 camshafts (originally with automatic compression release) will be accepted as a core. Older, out-dated steel cams for Kohler 10-16hp engines will also be accepted as a core. Core must be in good condition, no cracks, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact. If core has a worn lifter lobe, but rest of cam is in good condition, that will be fine because it will need to be welded up (then reground) anyway.
  • $185.00 each outright with no core trade-in, plus shipping & handling.
  • When sending a cam to A-1 Miller's, please include a note with your name, complete mailing address, phone number and a description of what you want done and a list of any other parts you may need, and we will contact you when the cam (and parts) are ready to be sent back to you. Please send to: A-1 Miller's Performance Enterprises, 1501 W. Old Plank Rd., Columbia, MO (Missouri) 65203-9136 USA.

High Performance Camshaft for Hot-Stock and Stock-Altered Kohler Competition Pulling Engines -

Fits Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 Pulling Engines. This is a much more aggressive camshaft than above È. Lobes are hard-surface welded on an OEM Kohler cast cam, then professionally precision ground to give it a stock lift (.324"-.330"), but much more duration (290º). This cast cam performs best with high performance (red) valve springs (below Ê), reworked and undercut stock size or oversize valves for more airflow, ports made larger and the venturi in the carburetor bored out. If there's any restriction in and out of the combustion chamber, the cam will not be able to perform at 100% efficiency for better engine performance. Due to the increased duration, with an open header pipe, this cam produces a loud and attention-getting BOOM, BOOM sound out the exhaust at idling speed, then the sound "smoothes out" at high RPM, and a "bellowing and rumbling" sound upon deceleration. This cam profile helps the engine produce the most power and torque at wide open throttle operation. If used in a 4,000± RPM engine, no substantial increase in power will result. To be used with wide base lifters. When reusing lifters, roughen lifter faces with 600 grit sandpaper in an erratic pattern to produce a new wear pattern and so the lifters will rotate slightly with every lift to prevent wear to the cam lobes. Use the recommended break-in oil, too. This cam installs just like the OEM Kohler cam. Just thoroughly lubricate the inside with motor oil, align the timing marks on the gear teeth, set the end-play and valve clearances at .010" for the intake and .014" for the exhaust, and it should be good to go! NOTE: If methanol fuel is going to be burned in the engine and the ignition timing advanced more than 25º BTDC, the automatic compression release mechanism on this cam will need to be removed and a high torque starter motor will also need to be used. Otherwise, the timing would be so far advanced, the spark will occur when the compression release opens the exhaust valve. This will cause the engine to be hard to start, if it would start at all. IMPORTANT: To prevent seizing of camshaft on pin when engine is ran for the first time, apply plenty of motor oil on cam pin and inside cam before installing cam in engine. This will better protect the parts until crankcase oil reaches them.

  • $135.00 each, plus return shipping & handling, on YOUR Kohler K241/M10, K301/M12, K321/M14 or K341/M16 camshaft to be welded up and reground for Hot-Stock or Stock-Altered wide open throttle operation: NOTE: Only the one-piece K241/M10, K301/M12, K321/M14 or K341/M16 camshafts (originally with automatic compression release) will be accepted for grinding. Older, out-dated steel cams for Kohler 10-16hp engines will also be accepted as a regrind. Cam must be in good condition, no cracks, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact. If cam has a worn lifter lobe, but rest of cam is in good condition, that will be fine because the lobe will need to be welded up (then reground) anyway.
  • $160.00 each with acceptable core trade-in for exchange, plus shipping & handling. NOTE: Only the one-piece K241/M10, K301/M12, K321/M14 or K341/M16 camshafts (originally with automatic compression release) will be accepted as a core. Older, out-dated steel cams for Kohler 10-16hp engines will also be accepted as a core. Core must be in good condition, no cracks, gear teeth in good condition, minimal wear on points lobe and preferably the compression release tang intact. If core has a worn lifter lobe, but rest of cam is in good condition, that will be fine because it will need to be welded up (then reground) anyway.
  • $185.00 each outright with no core trade-in, plus shipping & handling.
  • When sending a cam to A-1 Miller's, please include a note with your name, complete mailing address, phone number and a description of what you want done and a list of any other parts you may need, and we will contact you when the cam (and parts) are ready to be sent back to you. Please send to: A-1 Miller's Performance Enterprises, 1501 W. Old Plank Rd., Columbia, MO (Missouri) 65203-9136 USA.


High Performance (Red) Single Valve Spring Set for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. These are more aggressive than the blue valve springs above È. Suitable for competition pulling engines that run at very high RPM or wide open throttle. Can be easily compressed with a small engine valve spring compressor tool. Designed for cast or steel cams with up to .400" lift in Hot-Stock or Stock-Altered competition pulling engines that run at wide open throttle for quicker valve closing to prevent valve float. (Newton's third law of motion.) Valve float allows the engine to momentarily lose compression, cause fuel to spray out the carburetor and the engine will make a "hunt, hunt" sound at high RPM. As a result, the engine will lose power, and as the weight box on the sled moves forward upon on the tractor, the engine may not be able to recover. These springs can be used with stock size or oversize valves, OEM Kohler stamped steel/non-rotator retainers and keepers/locks/collets. Do not use with OEM Kohler valve rotators with these springs! Rotators are thicker, and being these performance springs are much longer (and much stiffer) than stock springs that require rotators, coil bind may result at full valve lift, which could break the cam. Sold as a matched set. One spring is no stiffer than the other. Can be easily compressed with a standard small engine valve spring compressor tool. Same diameter as OEM Kohler springs. Dimensions: .697" I.D.; .953" O.D.; 2" uncompressed height. specifications: Seat load: 55 @ 1.500"; Open load: 127 @ 1.000"; Coil bind: .950"; Spring rate (lbs/inch): 144. Made by Comp Cams.

  • New. $12.00 per set of two, plus shipping & handling.


High Quality, High Performance, Lightweight, Hardened 4140 Chrome-Moly Steel 7º Valve Spring Retainers. Not stamped steel. Fits Kohler engine models K141, K160/K161, K181/M8, K241/M10, K301/M12, K321/M14, K341/M16, K361, KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20, MV20, K482, K532 and K582. To be used with our BLUE medium performance valve springs or our RED high performance valve springs, or when used with OEM Kohler valve springs, the [longer] 1-11/16" or 1-3/4" uncompressed height spring must be used. Replaces OEM Kohler part # 230011-S.
  • New. $10.00 per set of two, plus shipping & handling.
OEM Kohler Valve Springs specially designed for Kohler engine models K141, K160/K161, K181/M8. Each has no dampening end. Recommended for general lawn and garden use. Suitable for up to 3,600± RPM with cam having stock lift. NOTE: Used valve springs rarely lose adequate pressure. They can be reused as long as they're not rusted. The rust-pitted areas is a weak spot and when in operation and under pressure, the spring could break.
  • 1-9/16" uncompressed height; use only with valve rotator. Rotator recommended for exhaust valve to scrape away any carbon deposits lodged between valve face and seat to prevent valve from burning. Discontinued from Kohler. OEM Kohler part # 230168-S. Used and in excellent condition, and rust-free. $10.00 each, plus shipping & handling. (When available.)
  • 1-11/16" uncompressed height; use only with stamped steel valve retainer. Suitable for intake valve. Discontinued from Kohler. OEM Kohler part # 230010-S. Used and in excellent condition, and rust-free. $9.00 each, plus shipping & handling. (When available.)


OEM Kohler Valve Springs for Kohler K-series and Magnum engine models K241/M10, K301/M12, K321/M14, K341/M16, K361, K482, K532 and K582. Each has dampening end to lessen harmonic vibrations at higher RPMs. Recommended for general lawn and garden use. Suitable for up to 3,600± RPM with cam having stock lift. Most Kohler engines have the short valve spring (1-9/16") with the rotator on the exhaust valve (to scrape away any carbon deposits), and the long spring (1-3/4") with the stamped steel retainer on the intake valve. NOTE: Used valve springs rarely lose adequate pressure. They can be reused as long as they're not rusted. The rust-pitted areas is a weak spot and when in operation and under pressure, the spring could break.

  • 1-9/16" uncompressed height; use only with valve rotator. Rotator recommended for exhaust valve to scrape away any carbon deposits lodged between valve face and seat to prevent valve from burning. Used and in excellent condition. Discontinued from Kohler. OEM Kohler part # 235168-S. $5.00 each, plus shipping & handling. (When available.)
  • 1-3/4" uncompressed height; use only with stamped steel valve retainer. Suitable for intake valve.
    • Used and in excellent condition, and rust-free. $5.00 each, plus shipping & handling. (When available.)
    • New. OEM Kohler part # 235010-S. $10.45 each, plus shipping & handling.


OEM Kohler Valve Spring specially designed for Kohler KT-series and Magnum engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. Has no dampening end. Recommended for general lawn and garden use. Suitable for up to 3,600± RPM with cam having stock lift.

  • New. 1-9/16" uncompressed height; use only with valve rotator. Rotator recommended for exhaust valve to scrape away any carbon deposits lodged between valve face and seat to prevent valve from burning. OEM Kohler part # 25 089 01-S. $4.15 each, plus shipping & handling.
OEM Kohler Stamped Steel Valve Spring Retainer for Intake Valve Spring. Fits Kohler K-series and Magnum K141, K160/K161, K181/M8, K241/M10, K301/M12, K321/M14, K341/M16, K361, KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20, MV20, K482, K532 and K582. Used mainly for intake valve. Use only with long (1-3/4") OEM Kohler or the medium-, or high-performance valve springs above È. May cause lifter rattle, valve float and engine misfire if used with the short (1-9/16") valve spring. For 5/16" diameter valve stems. Accepts 7º keepers/locks/collets below Ê. .998" outside diameter. Made of lightweight heat-treated, hardened stamped steel.
  • Used and in excellent condition. $4.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 230011-S. $6.30 each, plus shipping & handling.

OEM Kohler Valve Rotator for Exhaust Valve Spring. Fits Kohler K-series and Magnum K141, K160/K161, K181/M8, K241/M10, K301/M12, K321/M14, K341/M16, K361, KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20, MV20, K482, K532 and K582. Also fits 6hp-18hp single and opposed (flathead) twin cylinder Briggs and Stratton engines exhaust valves. Used mainly for exhaust valve. Slightly rotates valve as it opens to scrape away any carbon deposits from valve face and seat to prevent burning of valve face. Use only with short (1-9/16") valve spring above È. If used with longer valve spring, coil bind may occur, resulting in possible cam breakage. For 5/16" diameter valve stems. Accepts 7º keepers/locks/collets below Ê. 1.080" outside diameter.

  • Used Kohler part. $12.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 52 413 01-S. Replaces Briggs & Stratton part # 691939. $23.75 each, plus shipping & handling.
5/16" Valve Keepers/Locks/Collets for all Kohler K-series and Magnum K141-K361 cast iron engines, and KT series and Magnum twin cylinder flathead engines, including K482, K532 and K582. Also fits 6hp-18hp single- and twin-cylinder Briggs & Stratton exhaust valves. Can be used with 8mm valve stems and high performance valve springs above È. NOTE: Valve keepers usually don't wear or get damaged because they don't rotate on the valve stem. To check yours, with a valve out of the engine, install a valve retainer or rotator on the valve, then the keepers, and then pull back hard on the retainer or rotator. If the retainer or rotator holds or squeezes the keepers tight in the groove, then they can be reused. Replaces Briggs & Stratton part # 494553.
  • Race quality aftermarket. Replaces Kohler part # 41 755 10-S. $3.00 per set (two keepers for one valve), plus shipping & handling.
  • OEM Kohler part # 41 755 10-S. $6.35 per set (two keepers for one valve), plus shipping & handling. [Return To Previous Paragraph, Section or Website]
OEM Kohler Stamped Steel Valve Spring Stabilizer. Reduces harmonic vibrations of the valve spring at high RPMs. Fits Kohler K-series and Magnum K141, K160/K161, K181/M8, K241/M10, K301/M12, K321/M14, K341/M16, K361, KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20, MV20, K482, K532 and K582. For 5/8" O.D. valve guides. OEM Kohler part # 235011-S.
  • Used and in excellent condition. $2.00 each, plus shipping & handling. (When available.)
  • New. $3.55 each, plus shipping & handling.
High Quality, Heavy Duty Scissors-Type Small Engine Valve Spring Compressor Tool. Designed to compress OEM Kohler stock, our medium- and high-performance valve springs, but not the double or extremely heavy single springs. Can be used on flathead engines (valves in block) or Kohler K361 OHV cylinder head. Replaces Briggs & Stratton part # 19063.
  • $26.00 each, plus shipping & handling.
High Quality, Heavy Duty C-Shaped Small Engine Valve Spring Compressor Tool. Designed to compress OEM Kohler stock, our medium- and high-performance valve springs, but not the double or extremely heavy single springs. Can be used on flathead engines (valves in block) or Kohler K361 OHV cylinder head. Replaces Lisle part # 23300.
  • $35.00 each, plus shipping & handling.
High Quality, Extreme Duty Clamp-Type Valve Spring Compressor Tool. Designed to compress OEM Kohler stock, our medium- and high-performance valve springs, and the extremely heavy single or double springs. Can be used on flathead engines (valves in block) or Kohler K361 OHV cylinder head.
  • $20.00 each, plus shipping & handling.
Replace Worn Lifters (Tappets) to Prevent Erratic Valve Action and/or Premature Cam Lobe Wear!

Valve Lifter (Tappet) for Kohler K-series and Magnum single cylinder flathead engine models K141, K160/K161, K181 and M8. 1.964" overall length for exhaust valve only and newer one-piece camshaft with automatic compression release (ACR). Non-adjustable. Grind end of valve stems with piston at TDC on compression stroke to set valve clearances. Discontinued from Kohler. OEM Kohler part # 230013-S.

  • New Old Stock or used and in excellent condition. $15.00 each, plus shipping & handling. (When available.)

Valve Lifter (Tappet) for Kohler K-series and Magnum single cylinder flathead engine models K141, K160/K161, K181 and M8. 2.020" overall length for intake and exhaust valves and older two-piece camshaft without automatic compression release. Non-adjustable. Grind end of valve stems with piston at TDC on compression stroke to set valve clearances. Discontinued from Kohler. OEM Kohler part # 232777-S.

  • New Old Stock or used and in excellent condition. $16.00 each, plus shipping & handling. (When available.)


Wide Base LiftersValve Lifters (Tappets) for Kohler engine models K241/M10, K301/M12, K321/M14 and K341/M16. Dimensions - stem diameter: .6225", base diameter: 1.060", overall length: 2.750"-3.000" (adjustable). Use for OEM Kohler stock or performance cams with up to .340" lift. Set valve clearances with piston at TDC on compression stroke. OEM Kohler part # D-235327-S.

  • Used and in excellent condition. $20.00 each, plus shipping & handling. (When available.)
  • New. $41.92 each, plus shipping & handling.

1.280" Wide Base Adjustable Valve Lifters (Tappets) for Kohler engine models K241/M10, K301/M12, K231/M14 and K341/M16. For competition pulling engines only using high-performance cams with .400"-.575" lift. Set valve clearances with piston at TDC on compression stroke. Reuse 7/16" adjusters from OEM Kohler lifters with these wide base lifters.

  • Used and in excellent condition. $15.00 each, plus shipping & handling. (When available.)
  • New. $23.00 each, plus shipping & handling.

Adjustable Valve Lifter (Tappet) for Kohler engine models K482, K532 and K582. Set valve clearances with piston at TDC on compression stroke. Discontinued from Kohler. OEM Kohler part # D-277031-S.

  • New Old Stock. $50.00 each, plus shipping & handling. (When available.)


Valve Lifter (Tappet) for Kohler engine models KT17, KT17 Series II, KT19, KT19 Series II, MV18 (w/specification #'s 58560, 58561) and MV20 (w/specification #'s 57527, 57528). Used with serial number 1917809285 and before. 2.895" overall length. Discontinued from Kohler. OEM Kohler part #'s 52 019 01-S, 52 019 02 -S. (The OEM [US] manufacturers are phasing out many parts for flathead engines due to EPA smog emissions. But some parts may still be available in aftermarket.)

  • Used and in good condition. $10.00 each, plus shipping & handling. (When available.)

Valve Lifter (Tappet) for Kohler engine models MV16, M18, MV18 (except w/spec #'s 58560, 58561), M20 and MV20 (except w/specification #'s 57527, 57528). Used with serial number 1917809286 and after. 2.885" overall length. OEM Kohler part # 52 019 03-S.

  • New. $15.25 each, plus shipping & handling.


Valve Adjusting Screw for Kohler engine model K361. A-1 Miller's high quality aftermarket part. Made of heat-treated, hardened steel. Requires 1/4-20 UNC ordinary locking nut. Replaces Kohler part # 45 086 02-S. (No longer available.)

  • $2.00 each, plus shipping & handling.
Camshaft Pin for Kohler K-series and Magnum engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. 1144 Stress Proof Steel Pin. 7" length x 1/2" diameter. Discontinued from Kohler. Replaces Kohler part # 235053-S (K-series; 7" length) and 47 380 09-S (Magnum; 6-3/4" length). $12.00 each, plus shipping & handling.


New Expansion Cup Plugs for End of Cam Pin used on Kohler Magnum engine models M10-M16.

  • Tapered Expansion Cup Plug. High quality aftermarket. $1.00 each, plus handing & handling.
  • Shallow Expansion Cup Plug. OEM Kohler part # 25 139 50-S. $2.10 each, plus handing & handling.
Camshaft End Shims/Spacers/Thrust Washers for Kohler engine models K141, K161, K181, M8, CV12.5, CV13, CV14, CV15 and CV16.
  • .005" Thickness x 7/16" i.d x 3/4" O.D. OEM Kohler part # 230293-S. $4.35 each, plus shipping & handling.
  • .010" Thickness (OEM Kohler part # 230294-S) is discontinued from Kohler. Order two each of the .005" shims above to make one .010" shim.


Camshaft End Shims/Spacers/Thrust Washers for Kohler K-series and Magnum engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Aftermarket shims can also be used as an indexing washer for spark plugs.

  • .005" Thickness -
    • High quality aftermarket. Heat treated, spring steel. 1/2" I.D. x 3/4" O.D. Replaces Kohler part # 275066-S. .75¢ each, plus shipping & handling.
    • OEM Kohler part # 275066-S. 1/2" i.d x 1" O.D. $5.65 each, plus shipping & handling.
  • .010" Thickness -
    • High quality aftermarket. Heat treated, spring steel. 1/2" I.D. x 3/4" O.D. Replaces Kohler part # 275067-S. .75¢ each, plus shipping & handling.
    • OEM Kohler part # 275067-S. 1/2" i.d x 1" O.D. $5.65 each, plus shipping & handling.
Crankcase Breather and Air Cleaner Neoprene Rubber Seal. Fits Kohler engine models K90/K91, K241, K301, K321, K341, K361, K582, M10, M12, M14, M16, MV16, M18, MV18, M20, MV20, CH640, CH730, CH740, CV670, CV680, CV730 and CV740. Dimensions: 1/4" I.D. x 1/2" O.D. x 9/16" length. FYI - A reinforced rubber fuel hose of the same size can be substituted for this part. OEM Kohler part #'s 220369-S, 231032-S. $5.65 each, plus shipping & handling.


Crankcase Breather and Air Cleaner Neoprene Rubber Seal. Fits Kohler engine models K141, K160/K161, K181, M8, MV18 MV20, CH18, CH20, CH22, CH25, CH730 and CV15. Dimensions: 1/4" I.D. x 1/2" O.D. x 7/8" length. FYI - A reinforced rubber fuel hose of the same size can be substituted for this part. OEM Kohler part #'s 230046-S. $4.20 each, plus shipping & handling.

Crankcase Breather Filter (Oil Trap). Fits Kohler engine models K91, K141, K160/K161, K181/M8, and opposed (flathead) twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, M18 and M20. Replace deteriorated and crumbly filter. NOTE: This "filter" is actually an oil trap. It traps and suspends oil droplets and prevents oil vapors from exiting the crankcase at higher RPM, then allows the oil to drain back down into the crankcase when the engine is at idle or turned off. (It's too coarse to be a filter of any kind.) Not included in aftermarket engine gasket set. Dimensions: Approximately (±) 1-1/4" x 1-1/4".
  • OEM Kohler part # 231419-S. $5.65 each, plus shipping & handling.


Small Crankcase Breather Filter (Oil Trap). Fits Kohler engine models K241, K301, K330/K331, K321, K341 and various Magnum models M12, M14 and M16. Replace deteriorated and crumbly filter. NOTE: This "filter" is actually an oil trap. It traps and suspends oil droplets and prevents oil vapors from exiting the crankcase at higher RPM, then allows the oil to drain back down into the crankcase when the engine is at idle or turned off. (It's too coarse to be a filter of any kind.) Not included in aftermarket engine gasket set. Fills about 1/3 center area of breather plate. To be used with crankcase breather cover with open atmospheric vent and external oil control baffle shield part # 235117-S (below Ê). Dimensions: Approximately (±) 1-1/2" x 2".
  • OEM Kohler part # 235118-S. $12.30 each, plus shipping & handling.


Large Crankcase Breather Filter (Oil Trap). Fits Kohler AQS (Quiet Line) engine models K241, K301, K321, K341, K361 and various Magnum engine models M10, M12, M14 and M16. Replace deteriorated and crumbly filter. NOTE: This "filter" is actually an oil trap. It traps and suspends oil droplets and prevents oil vapors from exiting the crankcase at higher RPM, then allows the oil to drain back down into the crankcase when the engine is at idle or turned off. (It's too coarse to be a filter of any kind.) Not included in aftermarket engine gasket set. Fills entire area of breather plate. To be used with crankcase breather cover with PCV breather vent tube and external oil control baffle shield and reed stop part # 270146-S (below Ê). Dimensions: Approximately (±) 2" x 3". [Return to Previous Section, Paragraph or Website]
  • OEM Kohler part # 47 050 01-S. $7.60 each, plus shipping & handling.
Crankcase Breather Oil Control Baffle Shield and Reed Stop. Fits Kohler AQS (Quiet Line) engine models K241, K301, K321, K341, K361 and various Magnum engine models M10, M12, M14 and M16. Positions against reed valve inside of breather plate (below Ê). To be used with crankcase breather cover with PCV breather vent tube and large crankcase breather filter (oil trap) part # 47 050 01-S (above È). OEM Kohler part # 270146-S.
  • Used and in excellent condition. $2.50 each, plus shipping & handling. (When available.)
  • New. $5.20 each, plus shipping & handling.

Crankcase Breather External Oil Control Baffle Shield. Fits Kohler engine models K241, K301, K330/K331, K321, K341 and various Magnum models M12, M14 and M16 with an open atmospheric vent in crankcase breather cover. Prevents loss of oil through crankcase breather cover vent hole. Positions against reed valve inside of breather plate (below Ê). To be used with crankcase breather cover with open atmospheric vent and small crankcase breather filter (oil trap) part # 235118-S (above È). OEM Kohler part # 235117-S.

  • Used and in excellent condition. $2.00 each, plus shipping & handling. (When available.)
  • New. $4.15 each, plus shipping & handling.
Crankcase Breather Reed Valve for Kohler engine model K91. Replace damaged or rusted reed valve to prevent loss of oil through breather vent hole, prevent outside dust and dirt from being drawn into crankcase and maintain crankcase vacuum and proper ventilation so engine will produce more power and last longer.
  • OEM Kohler part # 220379-S. $5.50 each, plus shipping & handling.


Crankcase Breather Plate and Reed Valve Assembly for Kohler engine models K141, K160/K161, K181 and M8. Replace damaged or rusted breather plate/reed valve assembly to prevent loss of oil through breather vent hole, prevent outside dust and dirt from being drawn into crankcase and maintain crankcase vacuum and proper ventilation so engine will produce more power and last longer.

  • New Old Stock or used and in excellent condition. Discontinued from Kohler. OEM Kohler part # 230066-S. $15.00 each, plus shipping & handling. (When available.)
  • Modified Kohler twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 or MV20 crankcase breather plate and check valve or reed valve assembly so it will fit Kohler engine models K141, K160/K161, K181 and M8. NOTE: The neoprene rubber seal is not needed with the breather that have the umbrella check valve. Replaces Kohler part # 230066-S. $20.00 each, plus shipping & handling.


Crankcase Breather Reed Valve for Kohler engine models K241/M10, K301/M12, K330/K331, K321/M14, K341/M16 and K361. Replace damaged or rusted reed valve to prevent loss of oil through breather vent hole, prevent outside dust and dirt from being drawn into crankcase, and maintain crankcase vacuum so engine will produce more power. OEM Kohler part # 235047-S.

  • $10.15 each, plus shipping & handling.


Old Style Replacement Neoprene Rubber Umbrella Check Valve and Crankcase Breather Plate w/Umbrella Check Valve used on Kohler KT-series and Magnum opposed twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20. Replace deteriorated rubber umbrella check valve to prevent loss of oil through breather vent hole, prevent outside dust and dirt from entering crankcase and maintain crankcase vacuum so engine will produce more power. NOTE: The old style breather with the umbrella valve works just as well as the new style breather with the steel reed valve. So if the umbrella valve of your breather is damaged, it can be replaced. Also, it cost less to just replace the umbrella valve than the entire breather plate with the steel reed valve.

  • New Neoprene Rubber Umbrella Check Valve Only. High quality aftermarket. Dimensions: 1" diameter x 3/16" diameter center plug. Retaining hole in breather plate will need to be drilled out (enlarged) to 3/16". Discontinued from Kohler. Replaces Kohler part # 52 462 01. $4.00 each, plus shipping & handling.
  • Old Style Crankcase Breather Plate with New Neoprene Rubber Umbrella Check Valve Installed. Used and in excellent condition. Discontinued from Kohler. OEM Kohler part #'s 52 096 22, 52 096 41 or 52 452 07. $20.00 each, plus shipping & handling. (When available.)

New Style Crankcase Breather Plate with Steel Reed Valve for Kohler KT-series and Magnum opposed twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20. Each replaces OEM Kohler part # 52 254 07. NOTE: The two items listed below Ê are basically the same with different part numbers and prices.

  • OEM Kohler part # 52 035 02-S. $22.40 each, plus shipping & handling.
  • OEM Kohler part # 52 035 04-S. $23.00 each, plus shipping & handling.
Crankcase Breather Plate for Kohler engine models K241/M10, K301/M12, K330/K331, K321/M14, K341/M16 and K361. Prevents leaking oil and/or outside dust and dirt from entering crankcase and maintain crankcase vacuum so engine will produce more power. Has internal oil splash baffle shield spot-welded on backside of plate. OEM Kohler part # 235631-S.
  • Used and in excellent condition. $10.00 each, plus shipping & handling. (When available.)
  • New. $21.80 each, plus shipping & handling.
Crankcase Breather Cover and Kit for Kohler engine models K241/M10, K301/M12, K330/K331, K321/M14, K341/M16 and K361. Replace bent, damaged or rusted cover to prevent leaking oil.
  • Used and in excellent condition. $5.00 each, plus shipping & handling. (When available.)
  • New. Cover only w/open atmospheric vent. Irrelevant Kohler part number available. $8.50 each, plus shipping & handling.
  • Complete kit. Comes with cover, baffle (235117-S) and filter (235118-S). OEM Kohler part # A-235418-S. $21.65 each, plus shipping & handling.


Crankcase Breather Cover for Kohler AQS (Quiet Line) engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Replace bent, damaged or rusted cover to prevent leaking oil. Accepts PCV breather vent tube that connects to oblong-shaped metal air cleaner base. OEM Kohler part # 47 096 01-S.

  • Used and in excellent condition. $6.50 each, plus shipping & handling. (When available.)
  • New. $13.00 each, plus shipping & handling.

1/4" NPT x 1/2" Barb 90º Angle Breather Fitting to convert Quiet Line PCV crankcase breather cover above È to open atmospheric vent. Use 1/4" NPT hand tap to cut threads in cover to accept this fitting. Made of brass.

  • $10.00 each, plus shipping & handling.
Metal Hole Plug. Use to block-off/plug the breather vent tube hole in the base of the air cleaner on Kohler AQS (Quiet Line) and Magnum engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 when converting crankcase breather to open atmospheric vent. Plug prevents dust and dirt from entering the engine through the air cleaner, resulting in excessive engine wear, which will lead to smoking out the exhaust and oil burning. When the plug is installed in the hole, it will have a loose fit. Therefore, the locking tangs will need to be bent/flared outward to secure it permanently in place.
  • $2.00 each, plus shipping & handling.
Neoprene Rubber Crankcase Breather Vent Tube. 3-11/32" overall length. Used on various Kohler Magnum engine models M10, M12, M14 and M16. Fastens between base of air cleaner and crankcase breather cover. Part of positive crankcase ventilation system. Vents back-pressure from inside crankcase into air intake so engine can burn the oil vapors. Replace dry-rotted breather tube to prevent outside air from entering combustion chamber, which will cause excessive engine wear.
  • New Old Stock. Discontinued from Kohler. OEM Kohler part # 47 326 03-S. $6.00 each, plus shipping & handling. (When available.)


Neoprene Rubber Crankcase Breather Vent Tube. 3-17/32" overall length. Used on Kohler K-series "Quiet Line" engine models K241, K301, K321, K341 and K361. Fastens between base of oblong-shaped metal air cleaner/filter assembly and crankcase breather cover. Part of positive crankcase ventilation system. Vents back-pressure from inside crankcase into air intake so engine can burn the oil vapors. Replace dry-rotted breather tube to prevent outside air from entering combustion chamber, which will cause excessive engine wear.

  • OEM Kohler part # 47 326 01-S. $14.85 each, plus shipping & handling.


Neoprene Rubber Crankcase Breather Vent Tube. 3-29/32" overall length. Part of positive crankcase ventilation system. Used on various Kohler Magnum engine models M10, M12, M14 and M16. Fastens between base of air cleaner and crankcase breather cover. Vents back-pressure from inside crankcase into air intake so engine can burn the oil vapors. Replace dry-rotted breather tube to prevent outside air from entering combustion chamber, which will cause excessive engine wear.
  • New Old Stock. Discontinued from Kohler. OEM Kohler part # 47 326 04-S. $35.00 each, plus shipping & handling. (When available.)


Neoprene Rubber Crankcase Breather Vent Hoses/Tubes. Each used on various Kohler Magnum engine models KT17, KT17 Series II, KT19, KT19 Series II, M18 and M20, according to specification number. Fastens between base of air cleaner and crankcase breather cover. Part of positive crankcase ventilation system. Vents back-pressure from inside crankcase into air intake so engine can burn the oil vapors. Replace dry-rotted breather tube to prevent outside air from entering combustion chamber, which will cause excessive engine wear.
  • 3-5/8" Length. OEM Kohler part # 52 326 06-S. $22.50 each, plus shipping & handling.
  • 4-3/8" Length. OEM Kohler part #'s 25 325 06-S, 52 326 05-S. $12.00 each, plus shipping & handling.


Neoprene Rubber Crankcase Breather Vent Tubes. Either can be used on Kohler AQS (Quiet Line) and Magnum engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with the positive crankcase ventilation crankcase breather cover to convert engine to open atmospheric vent when used with the round-shaped metal air cleaner/filter assembly. Makes a nice distinctive look.
  • 1-5/8" overall length. (Originally made for Kohler engine models CH18, CH730 and CH740.) OEM Kohler part # 24 326 86-S. $5.95 each, plus shipping & handling.
  • 2" overall length. (Originally made for Kohler engine models CH18, CH20, CH23, CH640, CH730, CH740, CV18, CV20, CV22, CV23, CV25, CV620 and CV640.) OEM Kohler part # 24 326 83-S. $3.45 each, plus shipping & handling.
Valve Cover Gasket for Crankcase Breather Assembly. Fits Kohler engine models K141, K160/K161 and K181/M8, or Kohler twin cylinder engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20 with center cut out (3 gaskets required). High quality aftermarket. Replaces Kohler part #'s 230048-S and 52 055 01-S. $1.50 each, plus shipping & handling.

Valve Cover Gasket for Crankcase Breather Assembly. Fits Kohler engine models K141, K160/K161 and K181/M8. OEM Kohler part # 230048-S. $5.00 each, plus shipping & handling.

Valve Cover Gasket for Crankcase Breather Assembly. Fits Kohler twin cylinder engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. OEM Kohler part # 52 055 01-S. $4.85 each, plus shipping & handling.

Valve Cover Gaskets for Crankcase Breather Assembly. Fits Kohler engine models K241/M10, K301/M12, K330/K331, K321/M14, K341/M16 and K361. Included in complete engine rebuild gasket sets below.
  • Inner Gasket Only for Crankcase Breather Reed Plate. High quality aftermarket. Replaces Kohler part # 235048-S. $1.00 each, plus shipping & handling.
  • Outer Gasket Only for Crankcase Breather Cover. High quality aftermarket. Replaces Kohler part # 275144-S. $2.00 each, plus shipping & handling.
  • Inner Gasket. OEM Kohler part #'s 235048-S. $4.80 per two gaskets, plus shipping & handling.
  • Outer Gasket. OEM Kohler part #'s 275144-S. $5.40 each, plus shipping & handling.
If you need something that's not listed here, please contact A-1 Miller's and I'll see if I can get it for a reasonable price. Please contact A-1 Miller's if you're interested in any of the above È parts or items.

Cylinder Head Welding Repairs, New and Reconditioned OEM Kohler Cylinder Heads - Please contact A-1 Miller's if you're interested in any of these parts or services. | [Top of Page]

Professionally weld up burned-out area in small engine cylinder head, resurface on a wide sanding belt to remove warpage and restore flatness, and redrill bolt hole, if needed. NOTE - As long as there's no cracks in the head, it can be successfully welded up, resurfaced, and the bolt hole redrilled. IMPORTANT - Causes of a burn-out are: Throttle shaft in the carburetor is severely worn, allowing extra air in the combustion chamber, which will lean out the air/fuel mixture at high RPMs; the adjustable high speed air/fuel mixture screw is set too lean; or the engine is ran above 3,200 RPM with a [Walbro] carburetor having a fixed/non-adjustable high speed main jet. To prevent the burn-out from happening again, either of these things should be fixed correctly before the cylinder head is put back into service. $75.00 for welding and labor, plus return shipping & handling.

Cylinder head for Kohler engine models K141, K160, K161 and K181/M8. Cleaned and resurfaced on a wide sanding belt or large diameter disc sander to remove warpage and restore flatness. Cooling fins, spark plug threads and bolt holes for fastening of the sheet metal all in good condition. Click or tap here for cylinder head bolt torque specs.
  • Used and in excellent condition. Discontinued from Kohler. OEM Kohler part # 41 015 09-S. $75.00 each, plus shipping & handling. (When available.)
  • A-1 Miller's Professional Repair Service. Repair stripped spark plug threads in YOUR cylinder head and/or drill out broken bolt and retap threads for fastening sheet metal. Includes resurface head to remove warpage and restore flatness. $25.00 - $45.00 parts and labor, depending on extent of repair.


2nd Generation Cylinder Head for Kohler K-series and Magnum engine models K241/M10 and K301/M12. Can also be used on the early K321 engines with the small (1-1/8") exhaust valve. Cleaned and resurfaced on a wide sanding belt or large diameter disc sander to remove warpage and restore flatness. Cooling fins, spark plug threads and bolt holes for fastening of the sheet metal all in good condition. Click or tap here for cylinder head bolt torque specs.
  • Used and in excellent condition. Head with Short Bolt Hole Bosses. Requires 1-1/2" length head bolts. Discontinued from Kohler. OEM Kohler part # 236675. $85.00 each, plus shipping & handling. (When available.)
  • Used and in excellent condition. Head with Tall Bolt Hole Bosses. Requires 2" length head bolts. Discontinued from Kohler. OEM Kohler part #'s 236546 and 235475. $75.00 each, plus shipping & handling. (When available.)
  • A-1 Miller's Professional Repair Service. Repair stripped spark plug threads in YOUR cylinder head and/or drill out broken bolt and retap threads for fastening sheet metal. Includes resurface head to remove warpage and restore flatness. $25.00 - $45.00 parts and labor, depending on extent of repair.


3rd Generation Cylinder Head for Kohler K-series and Magnum engine models K241/M10, K301/M12 and K321/M14. Cleaned and resurfaced on a wide sanding belt or large diameter disc sander to remove warpage and restore flatness. Cooling fins, spark plug threads and bolt holes for fastening of the sheet metal all in good condition. Requires 1-1/2" length head bolts. Click or tap here for cylinder head bolt torque specs.
  • Used and in excellent condition. Discontinued from Kohler. OEM Kohler part # 237829. $75.00 each, plus shipping & handling. (When available.)
  • A-1 Miller's Professional Repair Service. Repair stripped spark plug threads in YOUR cylinder head and/or drill out broken bolt and retap threads for fastening sheet metal. Includes resurface head to remove warpage and restore flatness. $25.00 - $45.00 parts and labor, depending on extent of repair.


4th Generation Cylinder Head for Kohler K-series and Magnum engine models K241/M10, K301/M12 and K321/M14. Cleaned and resurfaced on a wide sanding belt or large diameter disc sander to remove warpage and restore flatness. Cooling fins, spark plug threads and bolt holes for fastening of the sheet metal all in good condition. Each requires 1-1/2" length head bolts. Click or tap here for cylinder head bolt torque specs.
  • Used and in excellent condition. Discontinued from Kohler. OEM Kohler part # 237670. $75.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 237830.$251.00 each, plus shipping & handling.
  • A-1 Miller's Professional Repair Service. Repair stripped spark plug threads in YOUR cylinder head and/or drill out broken bolt and retap threads for fastening sheet metal. Includes resurface head to remove warpage and restore flatness. $25.00 - $45.00 parts and labor, depending on extent of repair.


16hp Cylinder Head for Kohler K-series and Magnum engine models K341/M16. Cleaned and resurfaced on a wide sanding belt or large diameter disc sander to remove warpage and restore flatness. Cooling fins, spark plug threads and bolt holes for fastening of the sheet metal all in good condition. Requires 1-1/2" length head bolts. Click or tap here for cylinder head bolt torque specs.
  • Used and in excellent condition. Discontinued from Kohler. OEM Kohler part #'s 45 015 06 and 45 015 09. $150.00 each, plus shipping & handling. (When available.)
  • A-1 Miller's Professional Repair Service. Repair stripped spark plug threads in YOUR cylinder head and/or drill out broken bolt and retap threads for fastening sheet metal. Includes resurface head to remove warpage and restore flatness. $25.00 - $45.00 parts and labor, depending on extent of repair.
Cylinder Head Bolts and Flat Washers below Ê for Kohler engine models K141, K160/K161, K181 and M8. Replace bolts with eroded, rusted heads to prevent socket from slipping so bolt will torque down correctly. 5/16" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. NOTES: Clean the threads in the block with a 5/16-18 UNC plug hand tap so the bolts will torque correctly. Then apply motor oil on the threads and torque each bolt to 240 in. lbs. or 20 ft. lbs. Liquid threadlocker is not necessary. Click or tap here for cylinder head bolt torque specs.
  • High quality aftermarket. Set of 7 bolts only. $7.00 per set, plus shipping & handling.
  • High quality aftermarket. Set of 7 bolts and 7 washers. $10.50 per set, plus shipping & handling.
  • OEM Kohler part #'s 41 086 02-S (bolt), 220534-S (washer). $49.35 per set, plus shipping & handling.


Cylinder Head Bolts and Flat Washers below Ê for Kohler engine models MV16, KT17, KT17 Series II, KT19, KT19 Series II, M18, MV18, M20 and MV20. Replace bolts with eroded, rusted heads to prevent socket from slipping so bolt will torque down correctly. 5/16" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. NOTES: Clean the threads in the block with a 5/16-18 UNC plug hand tap so the bolts will torque correctly. Then apply motor oil on the threads and torque each bolt to 240 in. lbs. or 20 ft. lbs. Liquid threadlocker is not necessary. Click or tap here for cylinder head bolt torque specs.

  • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
  • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
  • OEM Kohler part #'s 41 086 02-S (bolt), 220534-S (washer). $63.45 per set, plus shipping & handling.


Cylinder Head Bolts and Flat Washers below Ê for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361. Replace bolts with eroded, rusted heads to prevent socket from slipping so bolt will torque down correctly. NOTES: Clean the threads in the block with a 3/8-16 UNC plug hand tap so the bolts will torque correctly. Then apply motor oil on the threads and torque each bolt to 360 in. lbs. or 30 ft. lbs. Liquid threadlocker is not necessary. And the length of any bolt (or screw) do not include the bolt head itself. They are measured from under the head to end of the threads. Bolt lengths below Ê is determined by type of cylinder head used. Click or tap here for cylinder head bolt torque specs.

  • For Kohler engine models K241/M10, K301/M12 and K321/M14. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. These are for OEM heads with recessed bolt holes that's below the height of the cooling fins.
    • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
    • OEM Kohler part #'s 25 086 115-S (bolt, 270889-S (washer). $64.75 per set, plus shipping & handling.
  • For Kohler engine models K241/M10, K301/M12 and K321/M14. 3/8" diameter x 2-1/4" thread length grade 8 bolts and hardened washers. These are for OEM heads with bolt holes that's the same height as the cooling fins, and with no mounting bracket/plate under the bolt head. Kohler part #'s 271077 (bolt; discontinued from Kohler), 270889-S (washer).
    • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
  • For Kohler engine models K241/M10, K301/M12 and K321/M14. 3/8" diameter x 2-1/2" thread length grade 8 bolts and hardened washers. These are for OEM heads with bolt holes that's the same height as the cooling fins, and with a gas tank mounting bracket or other mounting bracket/plate under the bolt head.
    • High quality aftermarket. Set of 9 bolts only. $9.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 9 bolts and 9 washers. $13.50 per set, plus shipping & handling.
    • OEM Kohler part #'s 235175-S (bolt), 270889-S (washer). $98.00 per set, plus shipping & handling.
  • For Kohler engine models K341/M16. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers.
    • High quality aftermarket. Set of 10 bolts only. $10.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 10 bolts and 10 washers. $15.00 per set, plus shipping & handling.
    • OEM Kohler part #'s 25 086 115-S (bolt), 270889-S (washer). $69.70 per set, plus shipping & handling.
  • For Kohler engine model K361. 3/8" diameter x 1-1/2" thread length grade 8 bolts and hardened washers. OEM Kohler part #'s 270721-S (bolt; discontinued from Kohler), 270889-S (washer).
    • High quality aftermarket. Set of 6 bolts only. $6.00 per set, plus shipping & handling.
    • High quality aftermarket. Set of 6 bolts and 6 washers. $9.00 per set, plus shipping & handling.


Aftermarket Single Cylinder Head Stud Kits for Kohler engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with an OEM or Billet Head. Each kit includes 3/8" diameter x 2" or 2-3/4" length high quality heat-treated studs, grade 8 nuts and hardened flat washers. I can also make the head studs any length you want. The ones that's listed here are the most common lengths. When installed correctly and torqued to specs, head studs provide even torque pressure for better head gasket sealing. Plus, with a thinner cylinder wall with a huge, oversized piston, they help maintain cylinder wall stability and straightness for better ring seal to lessen the loss of compression. Thoroughly tested for several years of continuous use under pulling conditions, for Kohler engine models, hardened and heat-treated coarse thread studs, along with grade 8 nuts and washers, works just fine, with no problems. The nuts maintain their torque as long as they're tightened to the correct torque specs. And make sure at least 3/4" of threads are in the block so the cylinder wall will not distort and threads in block will not strip out when the nuts are torqued to specs. Click or tap here for cylinder head bolt torque specs. (Cast iron is weaker than hardened steel.) Also, the flat washers goes under the nuts to distribute even pressure across head. IMPORTANT: As with any threaded stud, apply medium strength liquid threadlocker (Blue Loctite, Permatex or equivalent) on threads that goes in the block to prevent stud from loosening. FYI - When storing an opened container of liquid threadlocker or Super Glue, store it upright and not laying flat. The [capped] tip will not dry out and clog when stored upright. Thread stud 3/4" into the block. Use a hardened flat washer under nut to distribute load across head and apply motor oil on exposed threads so nut will torque correctly. Torque each nut to 360 in. lbs. or 30 ft. lbs. in correct sequence. Also, stud length is determined by type of cylinder head. The OEM head with short bolt holes require 2" length studs, the head with tall bolt holes require 2-3/4" length studs. Please indicate length of studs when placing order. An innovative concept by Brian Miller. Accept no copycat parts! (But I do appreciate them acknowledging my intelligence.)

  • For Kohler engine models K241/M10, K301/M12 and K321/M14. Available in 2", 2-3/4" or 3-1/4" (OEM) lengths (please specify length). Set of 9 studs, nuts and washers. $20.00 per set, plus shipping & handling.
  • For Kohler engine models K341/M16. 2" length. Set of 10 studs, nuts and washers. $22.00 per set, plus shipping & handling.
  • For Kohler engine model K361. 2" length. Set of 6 studs, nuts and washers. $13.00 per set, plus shipping & handling.


OEM Kohler Cylinder Head Studs for Kohler engine models K241/M10, K301/M12, K321/M14 and K341/M16. Dimensions of each stud: 3/8-16 UNC (coarse thread) threads; 3-1/4" overall length; short threaded length: 5/8"; long threaded length: 1-7/8". IMPORTANT: As with any threaded stud, apply medium strength liquid threadlocker (Blue Loctite, Permatex or equivalent) on threads that goes in the block and tighten with pliers to prevent stud from loosening. FYI - When storing an opened container of liquid threadlocker or Super Glue, store it upright and not laying flat. The [capped] tip will not dry out and clog when stored upright. Use a hardened flat washer under nut to distribute load across head and apply motor oil on exposed threads so nut will torque correctly. Torque each nut to 360 in. lbs. or 30 ft. lbs. in correct sequence. Not available in aftermarket.

  • Used and in excellent condition. OEM Kohler part #'s 237277-S (discontinued) or 237522-S. $5.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 237522-S. $11.50 each, plus shipping & handling.


Steel Spacer for Studs Above. Use with OEM Kohler single cylinder engine cylinder heads with the recessed bolt hole bosses when using a gas tank mounting bracket or other kind of flat bracket. Replaces discontinued Kohler part #'s 25 112 14-S and X-400-71-S. Dimensions: 13/32" I.D. x 5/8" O.D. x 23/32" height.

  • A-1 Miller's high quality aftermarket. $5.00 each, plus shipping & handling.
  • OEM Kohler part # X-400-91-S. $9.00 each, plus shipping & handling.

Cylinder Containment Strap Kit for Kohler 10-16hp K-series and Magnum Engines. Professionally made. This setup is easy to remove and reinstall when it comes time to freshen the engine. It looks nice and very strong. Prevents cylinder/crankcase separation (engine explosion) during cool weather when cylinder is bored thin for an excessively oversize piston. A must for methanol burning engines. NOTE: An additional 3/8" threaded hole may need to be made for mounting of brace on PTO end of block.

  • Fabricated A-1 Miller part. $45.00 per kit, plus shipping & handling.

Cooling Fan, Reconditioned OEM Kohler Flywheels, Crankshafts and Main Bearings - | Please contact A-1 Miller's if you're interested in any of these parts or services.
High Velocity 12 Volt Engine Cooling Fan. Use an electric cooling fan when engine has a steel flywheel with no cooing fins. Draws 2.6 amps, produces 145 CFM. Measures 3" diameter and 5" length. Best to fasten fan on a sturdy angle steel support bracket in front of engine or behind grille in a Cub Cadet garden tractor. Motor is 100% secured and reinforced in plastic fan housing tube to withstand severe engine vibrations. Motor will not loosen or become inoperable when pulling. No need to install rubber mounting grommets. These will serve no purpose whatsoever. IMPORTANT: Do not run fan while pulling because the internal brushes could break due to normal engine vibration. Turn fan on ONLY between pull-offs or when tuning engine.
  • $35.00 each, plus shipping & handling.
Kohler K181 Flywheel for the 5-1/2" 15/20 Amp Charging Stator. Replace damaged flywheel, or use this type of flywheel with the 5-1/2" stator to convert a K181 engine with a stator containing a failed magneto ignition coil integrated with a weak output 10 amp charging coils under the flywheel to the battery-powered ignition system. OEM Kohler part # 41 025 17-S.
  • Used and in excellent condition. $250.00 each, plus shipping & handling. (When available.)
  • New. $505.08 each, plus shipping & handling.
Dynamic Precision Spin-Balancing Service -
  • Balance (cast or steel) flywheel for Kohler 10-16hp cast iron block engine. $75.00 each labor, plus return shipping & handling.
  • Balance cast iron (Kohler) crankshaft and matching connecting rod and piston assembly. $260.00 per rotating assembly, plus return shipping & handling. [Return To Previous Paragraph, Section or Website]

A-1 Miller's Computerized Stuska Water Brake Engine Dynamometer (Dyno) Service with DPM Data Logger Software to Test Horsepower and Torque!

For performance testing of 10-16hp single cylinder Kohler stock or competition pulling engines at speeds up to 12,000 RPM. The only dyno service for testing Kohler pulling engines in central Missouri. Fully operational and 100% accurate, customers can rent dyno time, fine tune and make adjustments or changes to their engines to gain maximum horsepower and torque, and print-out the results so their tractor(s) will be truly competitive on the track. With an engine dyno, the puller can adjust their engine to get maximum horsepower and torque, and gear their tractor appropriately to have an advantage over the competition. NOTE: A fresh-built engine may not produce full power until it's broke-in. This is when the valves wear-in with the seats to completely seal in the compression. The rings will likely hold the compression, but the valves may leak slightly until they wear into the seats. This is normal for all engines and may take several hours or pulls to happen, then the valves will be able to hold full compression. Lots of pullers tell A-1 Miller's after I've built their engines that it seems to pull stronger every time they pull it.

Engine Dyno Rental Fee: $50.00 per hour run time from the moment the engine is started. No setup fee for Cub Cadet engines with a 3- or 6-pin/stud clutch driver. An adapter may need to be needed or fabricated for other makes and models of engines. Only engines with the narrow base oil pan can be tested. Engines with the wide base (tall) oil pan cannot be tested at this time. [Return to Previous Section, Paragraph or Website]

Flywheel Retaining Nuts for 5/8" or 3/4" threaded stud on end of Kohler K-series and billet steel crankshafts. OEM type of nuts discontinued from Kohler. IMPORTANT: Apply thin coat of motor oil on threads of crankshaft before installing nut, then torque each nut to 65 ft. lbs.
  • Nylon Insert Self-Locking Nut. 5/8-18 UNF (fine thread) threads. Replaces Kohler part # 25 100 02-S. $2.50 each, plus shipping & handling.
  • Nylon Insert Self-Locking Nut. 3/4-16 UNF (fine thread) threads. Used on early K241 crankshafts and most billet steel crankshafts. Replaces Kohler part #'s X-89-11, X-119-16. $3.00 each, plus shipping & handling.
Flywheel Retaining Bolt and Washer Kit for 3/8" threaded hole in end of crankshaft. Grade 8, 3/8" diameter, fine thread (3/8-24 UNF) bolt, split lock washer and extra thick washer. Most of these parts discontinued from Kohler. IMPORTANT: Apply thin coat of motor oil in threads of crankshaft or on bolt then torque 40 ft. lb.
  • High quality aftermarket. $5.00 each, plus shipping & handling.
Starter Pulley Retaining Bolt/Washer Kit for PTO end of crankshaft. Comes with grade 8, 3/8" or 7/16" bolt, split lock washer and extra thick washer. Certain professional pulling associations/clubs require this in case starter pulley comes loose on crankshaft and become an airborne projectile, which can cause serious injury to a bystander or spectator.
  • Choice of 3/8" or 7/16" bolt sizes. $5.00 per kit, plus shipping & handling.
Extra Thick Flywheel / Aluminum Hub Adapter Retaining Washers. A thick, wide washer is a must to secure flywheel and prevent clutch/driveshaft aluminum hub adapter breakage. Each made of steel and measures 1-1/4" O.D. x approximately 1/4" thick.
  • Washers with 13/32" center hole. To be used with a crankshaft that has a 3/8" bolt, and/or aluminum hub adapter that has a 3/8" center hole.
    • A-1 Miller part. $3.00 each, plus shipping & handling.
    • OEM Kohler part # 12 468 03-S. $3.80 each, plus shipping & handling.
  • Washer with 5/8" center hole. To be used with a crankshaft that has a 5/8" stud, and/or aluminum hub adapter that has a 5/8" center hole. A-1 Miller part. Discontinued from Kohler. Replaces Kohler part # X-25-104. $5.00 each, plus shipping & handling.
  • Washer with 3/4" center hole. To be used with a crankshaft that has a 3/4" stud, and/or aluminum hub adapter that has a 3/4" center hole. A-1 Miller part. Discontinued from Kohler. Replaces Kohler part # X-25-71. $5.00 each, plus shipping & handling.
Step Washer. Use to center cast aluminum or billet hub adapter with a 5/8" hole to a crankshaft with the 3/8" bolt on later model Kohler K-series and all Magnum engines. A must to prevent severe wobble/vibration and prevent hub and/or driveshaft/clutch breakage. Dimensions: 3/8" I.D. x 5/8" O.D. step x approximately 1-1/4" overall O.D. x 1/2" overall height. Professionally machined by Brian Miller.
  • $12.00 each, plus shipping & handling.
Cub Cadet hub adapters with 5/8" center hole (early K-series), w/pulley, w/dowel pin.
  • Used and in excellent condition. OEM Kohler part # 41 071 03-S. $60.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 41 071 03-S. $90.73 each, plus shipping & handling.
  • New. OEM Cub Cadet part # KH-41-071-03. $116.30 each, plus shipping & handling.
  • New. OEM Cub Cadet part # 759-3287. $204.00 each, plus shipping & handling.


Cub Cadet hub adapters with 5/8" center hole (early K-series), w/o pulley, w/dowel pin.

  • Used and in excellent condition. Discontinued from Kohler. OEM Kohler part # 41 071 05-S. $60.00 each, plus shipping & handling.
  • New. OEM Cub Cadet part # KH-41-071-05. $204.00 each, plus shipping & handling.


Cub Cadet hub adapters with 3/8" center hole (later K-series, all KT-series and Magnum), w/o pulley, w/dowel pin.

  • Used and in excellent condition. $40.00 each, plus shipping & handling. (When available.)
  • New. OEM Kohler part # 52 755 61-S. $115.55 each, plus shipping & handling.
1/4" diameter x 3/4" length hardened steel dowel pin for OEM Kohler and billet aluminum hub adapters. Secures aluminum hub to flywheel to prevent slippage. Replaces Cub Cadet part # KH-X-56-7 and Kohler part # X-56-7. $1.50 each, plus shipping & handling.
Flywheel grass/safety steel screen for use in IH-built Cub Cadet garden tractors with Kohler engine models K161 and K181. 5-9/16" diameter.
  • New Old Stock or Used and in excellent condition. Discontinued from Kohler. OEM Kohler part # 231819-S. $20.00 each, plus shipping & handling.
Flywheel grass/safety steel screen for use in IH-built Cub Cadet garden tractors with Kohler engine models K241 and K301. 7" diameter.
  • Used and in excellent condition. $120.00 each, plus shipping & handling.
  • New. OEM Cub Cadet part # KH-235190 and OEM Kohler part # 235190-S. $240.00 each, plus shipping & handling.
Steel Rectangular Flywheel Key for Kohler engine models K241, K301 and K321 made 1972 and earlier with the 8" diameter flywheel and starter/generator. Dimensions: 3/16" wide x 1/4" tall x 1-3/8" length. Discontinued from Kohler. OEM Kohler part # X-366-1-S.
  • Used and in excellent condition. $3.00 each, plus shipping & handling. (When available.)


Square Flywheel Keys for Kohler engine models K141, K160, K161, K181, M8, K241, K301, K321, K341, K361, KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20 made 1973 and later. Dimensions: 3/16" square x 1-3/8" length.

  • Steel Flywheel Key. High quality aftermarket. $1.00 each, plus shipping & handling.
  • Steel Flywheel Key. OEM Kohler part # X-286-17-S. $1.90 each, plus shipping & handling.
  • Aluminum Flywheel Key. Made of 6061 medium-grade hardness alloy aluminum. Helps prevent possibility of cracking/breaking of factory flywheel due to sudden crankshaft lock-up in the event of connecting rod failure. Replaces Kohler part # X-286-17-S. $5.00 each, plus shipping & handling.


Steel Woodruff (Semicircular) Flywheel Keys for early Kohler engine models K160, K161, K181 and later K321-K341 and all Magnum single cylinder engines. Dimensions: 3/16" wide x 1" length.

  • High quality aftermarket. $1.00 each, plus shipping & handling.
  • OEM Kohler part # X-46-3-S. $2.05 each, plus shipping & handling.


Steel Woodruff (Semicircular) Flywheel Key for most OHV aluminum block Kohler engines. Dimensions: 3/16" wide x 5/8" length.
  • High quality aftermarket. $1.00 each, plus shipping & handling.
  • OEM Kohler part # X-42-15-S. $1.70 each, plus shipping & handling.


OEM Kohler Cast Aluminum and Cast Iron Oil Pans - Please contact me if you're interested in any of these parts or services. | [Top of Page]
Magnetic Oil Drain Plugs with Tapered Threads and Square Head. A-1 Miller oil drain plugs have a super strong rare earth/neodymium magnet. Five times stronger than competitor's ceramic (ferrite) magnet and resists demagnetization. Plugs listed below can be used on various other makes and models of transmissions, transaxles, gearboxes and small engines. Tapered threads requires no sealing gasket or sealant, and threads will not strip out when tightened. To avoid cracking oil pan, do not over-tighten! When in doubt, to insure proper sealing and to prevent a possible oil leak, use Teflon®/plumber's thread seal tape on the threads. Universal application. Magnet attracts and removes ferrous metallic wear fragments from the motor oil or transmission/gearbox to reduce engine or gear/bearing wear. Sometimes some of the ferrous wear fragments settle to the bottom of the oil pan and do not drain out with the oil when performing an oil change, even when the oil is hot. The engine will last much longer due to cleaner oil. Magnetic drain plugs are suitable for engines with splash oil lubrication (no oil pump/filter).
  • 1/4" NPT (Tapered Threads) Magnetic Oil Drain Plug. Fits various Briggs & Stratton, Tecumseh and Kohler engines. A-1 Miller part. Discontinued from Kohler. Replaces Kohler part # X-75-2. $5.00 each, plus shipping & handling.
  • 3/8" NPT (Tapered Threads) Magnetic Oil Drain Plug. Fits various Briggs & Stratton, Tecumseh and Kohler engines. A-1 Miller part. High quality aftermarket. Replaces Kohler part # X-305-4-S. $5.00 each, plus shipping & handling.
  • 3/8" NPT (Tapered Threads) Magnetic Oil Drain Plug. OEM Kohler part # X-305-4-S. $18.35 each, plus shipping & handling.
  • 1/2" NPT (Tapered Threads) Magnetic Oil Drain Plug. Fits side of oil pan on Kohler engine models K141, K160/K161, K181 and M8 engines, and oil drain on Cub Cadet garden tractor transaxles and various automotive manual shift transmissions. A-1 Miller part. Not available from Kohler. $5.00 each, plus shipping & handling.
  • 3/4" NPT (Tapered Threads) Magnetic Oil Drain Plug. Fits various Briggs & Stratton and Kohler engines. A-1 Miller part. Not available from Kohler. $5.00 each, plus shipping & handling.
  • 3/4-10 UNC (Straight Threads) Magnetic Oil Drain Plug. Use to replace OEM Kohler 3/8" NPT oil drain plug with stripped threads in [aluminum] oil pan. Comes with fiber sealing gasket. NOTE: Threads in oil pan must be enlarged with a 3/4-10 UNC hand tap. A-1 Miller part. $5.00 each, plus shipping & handling.
  • 5/8" I.D. Fiber Sealing Gasket for OEM Kohler 3/8" NPT Oil Drain Plug with Hex Head. Discontinued from Kohler. Replaces Kohler part # 241063. $1.00 each, plus shipping & handling.


Super Strong Rare Earth/Neodymium Magnets for Engines, Transmissions, Transaxles and Gearboxes. Attracts and removes ferrous metallic wear fragments from the lubricating oil inside an engine that does not have an oil pump with an oil filter, or inside a transmission, transaxle or gearbox to lessen wear and noise to gears and bearings. Sometimes some of the wear fragments settle to the bottom of the oil pan or engine block and do not drain out with the oil when performing an oil change, even when the oil is hot. Engine or gears/bearings will last longer due to cleaner oil. Install magnet in bottom of oil pan away from the oil dipper and any moving parts, or in bottom of a transmission, transaxle or gearbox away from rotating gears and any moving parts. Use Krazy Glue, Super Glue, Gorilla Glue, or any industrial strength adhesive to secure magnet in place. These rare earth/neodymium magnets are EXTREMELY strong! Use caution when handling! Can be difficult to remove from a steel or cast iron surface, are very brittle and can break easily if mishandled. An innovative and ingenious concept by Brian Miller because nobody else advertise this trick. Please accept no advertised copycat product of this kind. (But I do appreciate them acknowledging my intelligence.) [Return To Previous Paragraph, Section or Website]

  • Rectangular Magnet. Dimensions: 20mm x 10mm x 2mm. Use in confined spaces, such as the deep sump oil pan for Cub Cadet garden tractor engines. $1.00 each, plus shipping & handling.
  • Round Magnet. Dimensions: 25mm x 2mm. Use in wide, open spaces or flat bottom oil pans. $1.00 each, plus shipping & handling.
Engine Oil Filters. Fits Kohler engine models CH11-CH15, CH18, CH20, CH25, CH620, CH640, CH730, CV12.5-CV26, CV460, CV680, CV730-CV750, MV16, KT17 Series II, KT19 Series II, MV16, M18, MV18, M20, MV20, K482, K532 and K582, K662, LV625 and LV675. Kohler part #'s 277233-S, 12 050 01-S, 52 050 02-S1; Briggs and Stratton part # 491056 (Vanguard). Has anti-drain back valve to minimize dry engine starts.
  • High quality aftermarket. 95% efficiency rating. specifications: 3" O.D. x 3.25" height. $10.00 each, plus shipping & handling.
  • Kohler brand. specifications: 3" O.D. x 3-7/16" height (general use.); 8-11 psi pressure relief; 29 microns. OEM Kohler part # 52 050 02-S1. $10.45 each, plus shipping & handling.
Oil Filter Adapter Kit. Fits Kohler engine models KT17 Series II, KT19 Series II, MV16, M18, MV18, M20 and MV20. Adding an oil filter helps the engine last longer between oil changes by filtering out small metallic fragments and contaminants. (Metal flake looks good in paint, not in oil.) Kit includes: Cast aluminum oil filter adapter, two Allen head mounting bolts and mounting gasket. Use the Allen set screw in model M18 engines w/specification # 24532, after serial # 1835400002 (1988 and newer).
  • OEM Kohler part # 82 755 23-S. $77.75 each, plus shipping & handling.
Repair Service: Repair stripped aluminum oil pan mounting bolt hole threads. No need to purchase another oil pan! $5.00 each for parts and labor, plus return shipping & handling.
Cast Aluminum, Narrow Base, Flat Bottom Oil Pan for Kohler K-series engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. Clean and in excellent condition, with good bolt thread holes and no cracks. Heli-Coil thread repair inserts installed if necessary. This will fit all IH-built Cub Cadet garden tractors, and John Deere models 110, 112 and early model 210 with the Kohler K241 engines. Model 112 serial number 100,001 – 250,000, 110 serial number 250,001 and up with the Kohler K241 engine, and 210 up to serial number 95,261. These will also fit Wheel Horse garden tractors. Holds 1 quart of oil. Weighs 1.3 lb. Discontinued from Kohler. OEM Kohler part # 237588-S.
  • Used and in excellent condition. $60.00 each, plus shipping & handling. (When available.)
  • Install Heli-Coil Thread Inserts to Repair Stripped Mounting Bolt Holes in YOUR Aluminum Oil Pan. FYI - Heli-Coil thread inserts installed in an aluminum oil pan makes it just as strong as the cast iron oil pan. $40.00 for all 4 bolt holes, plus return shipping & handling.
Cast Iron, Narrow Base, Flat Bottom Oil Pan for Kohler K-series engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. These are clean and in excellent condition, with good bolt thread holes and no cracks. This is also an exact replacement for John Deere models 110, 112 and early model 210 with the Kohler K241 engines. Model 112 serial number 100,001 – 250,000, 110 serial number 250,001 and up with the Kohler K241 engine, and 210 up to serial number 95,261. These will also fit Wheel Horse garden tractors. Clean and in excellent condition, including good bolt threads. Holds 1 quart of oil. Weighs 4.1 lb. Discontinued from Kohler. OEM Kohler part # 235352.
  • Used and in excellent condition. $75.00 each, plus shipping & handling. (When available.)
Cast Aluminum, Narrow Base, Deep Sump Oil Pans for Kohler K-series engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. Clean and in excellent condition, with good bolt thread holes and no cracks. Heli-Coil thread repair inserts installed if necessary. Suitable for general lawn and garden use or 4,000 RPM stock pulling engines. NOTE: For better lubrication, these oil pans require a full length oil dipper on the connecting rod. Holds 1-1/2 quarts of oil. Weighs 1.85 lb. Discontinued from Kohler. OEM Kohler part # 47 199 09-S.
  • Used and in excellent condition. $60.00 each, plus shipping & handling. (When available.)
  • Install Heli-Coil Thread Inserts to Repair Stripped Mounting Bolt Holes in YOUR Aluminum Oil Pan. FYI - Heli-Coil thread inserts installed in an aluminum oil pan makes it just as strong as the cast iron oil pan. $40.00 for all 4 bolt holes, plus return shipping & handling.
Cast Iron, Narrow Base, Deep Sump Oil Pan for Kohler K-series engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with a narrow base block, or if the flanges have been cut off, and the block is converted for use with a narrow base oil pan. Clean and in excellent condition, with good bolt thread holes and no cracks. Suitable for general yard and garden engines for durability and for stroker pulling engines. NOTE: For better lubrication, these oil pans require a full length oil dipper on the connecting rod. Holds 1-1/2 quarts of oil. Weighs 5.4 lb. Discontinued from Kohler. OEM Kohler part # 236328.
  • Used and in excellent condition. $75.00 each, plus shipping & handling. (When available.)
Cast Iron,Wide Base, Oil Pan for Kohler K-series engine models K241/M10, K301/M12, K321/M14, K341/M16 and K361 with a wide base/flanged block. These are clean and in excellent condition, with good bolt thread holes and no cracks. These come on various makes of tractors such as: Ariens, Wheel Horse, some Ford, some Jacobsen, Gravely, New Holland, Sears Suburban, Engineering Products Co. (Economy models) and Allis Chalmers. NOTE: For better lubrication, these oil pans require a full length oil dipper on the connecting rod. Holds 2 quarts of oil.
  • Used and in excellent condition. With side drain; most common. OEM Kohler part # 235115-S. $40.00 each, plus shipping & handling. (When available.)
  • Used and in excellent condition. With bottom drain. OEM Kohler part # 235147-S. $40.00 each, plus shipping & handling. (When available.)
  • New. With side drain; most common. OEM Kohler part # 235115-S. $243.00 each, plus shipping & handling.
  • New. With bottom drain. OEM Kohler part # 235147-S. $263.00 each, plus shipping & handling.
If you need something that's not listed here, please contact A-1 Miller's and we'll see if I can get it at a reasonable price. Please contact A-1 Miller's if you're interested in any of the above È parts or items.


Exhaust Gaskets, Complete Header Pipe Kits and Adapters - [Top of Page] | Please contact A-1 Miller's if you're interested in any of these parts or services.
Exhaust Port/Flange Gaskets for various Kohler engine models K141, K160/K161, K181 and M8. Measure accurately from center of bolt holes on engine block for correct part. Not available in aftermarket. L
  • With 1-9/16" (1.5625") bolt hole spacing. OEM Kohler part # 231090-S. $3.05 each, plus shipping & handling.
  • With 1-11/16" (1.6875") bolt hole spacing. OEM Kohler part # 41 041 01-S. $3.45 each, plus shipping & handling.
Exhaust Port/Flange Gaskets for Kohler engine models K241/M10, K301/M12 and K321/M14. 1-3/4" bolt hole spacing.
  • OEM Kohler part # 235122-S. $3.65 each, plus shipping & handling. Not available in aftermarket. L
Exhaust Port /Flange Gasket for Kohler engine model K361. 2-1/16" bolt hole spacing.
  • OEM Kohler part # 45 041 12-S. $4.20 each, plus shipping & handling. Not available in aftermarket. L
Exhaust Manifold-to-Cylinder Mounting Gaskets for Kohler flathead twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20. 1-3/4" offset bolt hole spacing.
  • OEM Kohler part # 52 041 14-S. $6.05 each, plus shipping & handling. Not available in aftermarket. L
Exhaust Manifold to Block Mounting Gasket for Kohler opposed (flathead) twin cylinder engine models K482, K532 and K582.
  • OEM Kohler part # 25 041 11-S. $8.01 each, plus shipping & handling. Not available in aftermarket. L
Exhaust Port Repair/Modification Services. (K141, K161, K181/M8, K241/M10, K301/M12, K321/M14 or K341/M16 Kohler engines.)

Drill and tap two 5/16-18 UNC bolt holes in exhaust mounting flange to install custom-made bolt-on exhaust system or header pipe flange. NOTE: Crankshaft and bearing plate will need to be removed from engine block so I can fasten block directly to table or in a V-shaped fixture to the table of my milling machine. An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block.

  • $40.00 labor, plus return shipping with Fastenal or FedEx Ground.


Remove or drill out broken exhaust bolt(s) and recut 5/16-18 UNC (coarse thread) threads for installation of new bolts or studs. NOTE: If broken bolt(s) needs to be drilled out, crankshaft and bearing plate will need to be removed from engine block so I can fasten block directly to table or in a V-shaped fixture to the table of my milling machine. An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block.

  • $10.00 - $40.00 labor (depending on difficulty of work involved), plus return shipping with Fastenal or FedEx Ground.


Resurface exhaust mounting flange to ensure 100% sealing of header flange and to prevent flange from loosening from block (due to rusted rough surface). NOTE: Crankshaft and bearing plate will need to be removed from engine block. Then with block fastened directly to table or in a V-shaped fixture fastened to the table of my milling machine, I make several passes with a grinding stone to resurface end of exhaust port. An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block.

  • $20.00 labor, plus return shipping with Fastenal or FedEx Ground.
High Quality Durable Mufflers. Fits Kohler engine models K141, K160/K161, K181/M8, K241/M10, K301/M12 and K321/M14, and Briggs & Stratton, Tecumseh and various other makes and models of larger small engines. Each coated with weather-proof and heat-resistant paint. Dimension of mufflers: approximately 3-1/4" x 3-1/4".
  • Muffler with 1" NPT threaded hole. $10.00, plus return shipping & handling.
  • Muffler with welded 4-1/2" length x 1" NPT threaded pipe. $20.00, plus return shipping & handling.
  • Muffler with 1-1/4" NPT threaded hole. Fits Kohler engine models K341 and M16 engines. $15.00, plus return shipping & handling.
Bolt-On Header Pipe Kits for Kohler Engine Models K241/M10, K301/M12 and K321/M14. For competition pulling engines with stock-size or oversize valves running at 4,000 RPM or at wide open throttle. High grade durable and galvanized-coated mild steel pipe resists rust and will not discolor, even from exhaust heat. Has a 90º, 4" radius bend; each pipe extends 8" from exhaust port to midway of bend for plenty of hood clearance and measures 18" upward from midway of bend. Kit includes 1-5/16" O.D. x 1.260" I.D. x 24" length header pipe, 2-1/2" O.D. x 1-5/16" I.D. x 5/16"± thickness round mounting flange and two 5/16-18 UNC Allen head bolts. Flange fastens directly to engine block.
  • Header Pipe Only. $15.00 each, plus shipping & handling.
  • Complete Header Kit with Pipe Not Welded to Flange. (Customer welds pipe to flange.) $25.00 per kit, plus shipping & handling.
  • Complete Header Kit with Pipe Professionally Welded to Flange. $35.00 per kit, plus shipping & handling.


Bolt-On Header Pipe Kits for Kohler Engine Models K341/M16. For competition pulling engines with stock-size or oversize valves running at 4,000 RPM or at wide open throttle. High grade durable and galvanized-coated mild steel pipe resists rust and will not discolor, even from exhaust heat. Has a 90º, 4" radius bend; each pipe extends 8" from exhaust port to midway of bend for plenty of hood clearance and measures 18" upward from midway of bend. Kit includes 1-1/2" O.D. x 1-3/8" I.D. x 30" length header pipe, 2-3/4" O.D. x 1-1/2" I.D. x 3/16"± thickness round mounting flange and two 5/16-18 UNC (coarse thread) grade 8 hex head bolts. 1" length of pipe inserts inside exhaust port covering internal NPT threads for unrestricted airflow. Flange fastens directly to engine block.

  • Header Pipe Only. $15.00 each, plus shipping & handling.
  • Complete Header Kit with Pipe Not Welded to Flange. (Customer welds pipe to flange.) $25.00 per kit, plus shipping & handling.
  • Complete Header Kit with Pipe Professionally Welded to Flange. $35.00 per kit, plus shipping & handling. shipping & handling.
Steel Exhaust Pipe or Header Pipe Mounting Flange for Kohler engine models K141, K160/K161, K181 and M8 with 1-9/16" or 1-11/16" exhaust port bolt hole spacings. Please specify if need for 1-9/16" or 1-11/16" bolt hole spacing. If no bolt holes exist next to exhaust port, two 5/16-18 UNC (coarse thread) threaded holes will need to be drilled and tapped at precise locations to accept this flange. Click or tap here to learn how to drill and tap bolt holes. Approximately 3/16" thickness with 1" center hole. Weld exhaust pipe or header to flange. No gasket is required. Fastens directly to engine block with clear RTV silicone adhesive sealant. This part was never available from Kohler.
  • A-Miller part. $10.00 each, plus shipping & handling.

Two 5/16-18 UNC (coarse thread) Hex Socket (Allen) Head bolts for above È flange.

  • $2.00/set of 2, plus shipping & handling.


Exhaust Pipe or Header Pipe Mounting Flanges. Each made of mild steel. No gasket is required. Fastens directly to engine block with clear RTV silicone adhesive sealant. NOTE: If no bolt holes exist next to exhaust port, two 5/16-18 UNC (coarse thread) threaded holes will need to be drilled and tapped at precise locations to accept this flange. Click or tap here to learn how to drill and tap bolt holes. Weld exhaust pipe or header to flange. This part was never available from Kohler.

  • Header Pipe Flange for Kohler engine models K241/M10, K301/M12, K321/M14 single cylinder, and opposed (flathead) twin cylinder KT17, KT17 Series II, KT19, KT19 series 2, M18 and M20. Dimensions: (2) 21/64" diameter mounting holes spaced 1-3/4" apart x 1-5/16" center hole x approximately 1/4" thickness. A-Miller part. $20.00 each, plus shipping & handling.
  • Header Pipe Flange for Kohler engine models K341/M16. Dimensions: (2) 21/64" diameter mounting holes spaced 2-1/4" apart x 1-1/2" center hole, approximately 3/16" thickness. A-Miller part. $15.00 each, plus shipping & handling.

Two 5/16-18 UNC (coarse thread) Hex Socket (Allen) Head bolts for above È flanges.

  • $2.00/set of 2, plus shipping & handling.


Heavy Duty Exhaust Pipe or Header Pipe Mounting Flange for Kohler engine models K341/M16. If no bolt holes exist next to exhaust port, two 5/16-18 UNC (coarse thread) threaded holes will need to be drilled and tapped at precise locations to accept this flange. Click or tap here to learn how to drill and tap bolt holes. Made of mild steel. Dimensions: (2) 21/64" oblong mounting holes spaced 2-1/4" apart x 1-1/2" center hole x 1/4" thick. Weld exhaust pipe or header to flange. No gasket is required. Fastens directly to engine block with clear RTV silicone adhesive sealant. Engine heat has very little effect on silicone rubber. It can withstand up to 2,500 degrees heat. This part was never available from Kohler.

  • A-1 Miller part. $15.00 each, plus shipping & handling.

Two 5/16-18 UNC (coarse thread) stainless stain hex-head bolts with flat washers for above È flange.

  • $2.00/set of 2, plus shipping & handling.


Steel Exhaust Pipe or Header Pipe Mounting Flange for Kohler engine model K361 18hp OHV. Made of mild steel. Dimensions: (4) 21/64" diameter mounting holes spaced 2-1/16" apart x 1-1/4" center hole x approximately 3/16" or 1/4" thickness. Weld exhaust pipe or header to flange. Being there is no 4-bolt hole exhaust gasket available for this particular engine, fasten flange directly to head with clear RTV silicone adhesive sealant. Exhaust heat has very little effect on RTV silicone rubber. It can withstand up to 2,500 degrees heat. This part was never available from Kohler.

  • 3/16" Thickness. A-1 Miller part. $20.00 each, plus shipping & handling.
  • 1/4" Thickness. A-1 Miller part. $30.00 each, plus shipping & handling.

Four 5/16-18 UNC (coarse thread) Hex Socket (Allen) Head bolts for above È flange.

  • $4.00/set of 4, plus shipping & handling.


Machine Shop Services. (Prices below Ê are with the engine out of the tractor and on my work table.) [Top of Page]
Engine Block -
  • Clean and degrease block. $7.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Deglaze cylinder wall (create cross-hatch) and clean block. $20.00 labor per cylinder, plus return shipping with Fastenal or FedEx Ground.
  • Hone cylinder bore to next oversize to fit OEM-type piston (OEM engine block). $75.00 labor per cylinder, plus return shipping with Fastenal or FedEx Ground.
  • Bore and hone cylinder in new Kohler-replicated aftermarket block to fit aftermarket piston. $120.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Clearance bottom cylinder wall for stroker crankshaft. $75.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Bore cam pin holes to 11/16" (.6875") for installation of needle bearings (OEM or Kohler-replicated aftermarket block). $50.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Remove welch plug and cut threads for auxiliary crankcase breather (OEM and Kohler-replicated aftermarket block. $20.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Drill 7/8" center hole and two outer 1/4" bolt holes in 10-16hp Kohler blocks for installation of mechanical fuel pump. $50.00 labor, plus return shipping with Fastenal or FedEx Ground.


Convert 10-16hp Kohler wide base block to narrow base, for use in a garden tractor requiring a narrow base engine block. (Cub Cadet, Ford, John Deere, Wheel Horse, etc.) See pictures below Ê An innovative concept by Brian Miller, because nobody else advertise this type of service for a Kohler engine block.

  • Cut off flanges even with sides of block. $40.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Cut off flanges even with sides of block and cut new threads in oil pan mounting holes. $60.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Cut off flanges even with sides of block, weld-in steel stock to fill-in oil fill/level check openings (notches), and cut new threads in oil pan mounting holes. $100.00 labor, plus return shipping with Fastenal or FedEx Ground.

Kohler Wide Base Block Converted to a Narrow Base Block

Valve Train Related - (Prices below are with your engine on my work table.)

Perform Professional Valve Job Only on opposed (flathead) twin cylinder Kohler KT-series and Magnum engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20. This service is for an engine that does not blow blue smoke out the exhaust and burn oil. Performing a professional valve job restores full compression, which allows the engine to start quicker, idle smooth without stalling, and it will have maximum power at top governed speed. Labor includes: regrind four valve faces and seats, lap in valves with valve lapping compound, reset valve clearances to factory specifications (on short block only), resurface both cylinder heads on a wide sanding belt to remove warpage and restore flatness, reinstall intake manifold and governor linkage. And being some valve guides wear beyond specifications, there will be an extra charge for installing and reaming new guides, if needed. The sheet metal, muffler, intake manifold and governor linkage will need to be removed before bringing or shipping engine/short block to A-1 Miller's shop. To save on shipping cost, only the cylinders (removed from crankcase) and valves can be shipped in a USPS Large Flat Rate Box. Use two boxes - place one box inside the another to double the strength, and use rigid packing material to prevent the cooling fins from breaking off by making contact with each cylinder. But the short block must be shipped in a sturdy wooden crate. Or if you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's shop to personally drop off and/or pick up your carburetor, clutch assembly, cylinders, engine, transaxle, tractor, etc. "The road to a friend's house (or shop) is never long."

  • Perform Valve Job on 2 Cylinders Only. (Customer resets valve clearances.) $70.00 labor, plus return shipping & handling.
  • Perform Valve Job on Short Block (sheet metal, intake manifold and governor linkage removed). $200.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • And being some valve guides wear beyond specifications, there will be an extra parts and labor charge for installing and reaming new guides, if needed.


Grind used valve to OEM angle: $5.00 each, plus return shipping & handling.

Grind your [45º] intake valve at 30º angle and undercut head for more airflow. $17.00 labor each, plus return shipping & handling.

Grind seat in your single cylinder block or OHV head to OEM angle or 30º angle: $5.00 labor each, plus return shipping with Fastenal or FedEx Ground.

Perform valve job to OEM specs (grind two valve faces and seats), install valves in single cylinder OEM [Kohler] block and set clearances: $25.00 labor, plus return shipping with Fastenal or FedEx Ground.

Perform performance valve job on two stock valves and seats in single cylinder OEM [Kohler] block for improved airflow: $40.00 labor, plus return shipping with Fastenal or FedEx Ground. Price includes grinding the exhaust valve and seat at 45º/46º angles, intake valve and seat at 30º/31º angles respectively and undercutting both valve heads.

Install oversize valves in single cylinder OEM [Kohler] block: $150.00 - $200.00 (depending size of valves) labor, plus return shipping with Fastenal or FedEx Ground. Price does not include any parts.

Install stock size valves in single cylinder Kohler-replicated aftermarket block with small uncut valve pockets: $150.00 labor, plus return shipping with Fastenal or FedEx Ground. Price does not include any parts.

Install oversize valves in single cylinder Kohler-replicated aftermarket block with small uncut valve pockets: $200.00 labor, plus return shipping with Fastenal or FedEx Ground. Price does not include any parts.

Enlarge and Polish Intake and Exhaust Port Runners -

  • Single cylinder OEM Kohler or Kohler-replicated aftermarket block with large ports: $75.00 labor, plus return shipping with Fastenal or FedEx Ground.
  • Single cylinder Kohler-replicated aftermarket block with small ports: $200.00 labor, plus return shipping with Fastenal or FedEx Ground.

Install 1-3/8" exhaust valve in 10, 12 and older 14hp OEM Kohler block: $50.00 labor, plus return shipping with Fastenal or FedEx Ground.

Install oversize valves, and enlarge/polish intake and exhaust runners in single cylinder (OEM [Kohler] block): $175.00 labor, plus return shipping with Fastenal or FedEx Ground.

Install oversize valves, and enlarge/polish intake and exhaust runners in single cylinder (Kohler-replicated aftermarket block): $300.00 labor, plus return shipping with Fastenal or FedEx Ground.

Install thin-wall bronze sleeves/liners in worn OEM valve guides in single cylinder Kohler and other makes of engines. $12.00 each, plus return shipping with Fastenal or FedEx Ground. Bronze valve guide sleeves/liners are an alternative to replacing the entire guide in Kohler engines. Bronze also last longer than Kohler's cast iron guides because bronze retains more oil for better lubrication of the valve stem.

Install OEM-type [centered] cast iron valve guide or offset valve guide in single cylinder OEM Kohler block and ream for clearance of valve stem: $15.00 each labor only, plus return shipping with Fastenal or FedEx Ground. Price does not include guide.

Install bronze offset valve guide in single cylinder OEM Kohler block and ream for clearance of valve stem: $15.00 each labor only, plus return shipping with Fastenal or FedEx Ground. Price does not include guide. Oversize valve MUST be used with an offset guide.

Resurface air-cooled small engine cylinder head on large disc sander or wide, flat belt sander to remove warpage and restore flatness, and deburr sharp edge around combustion chamber. $10.00 labor, plus return shipping & handling.

Mill cylinder head approximately .050". Remove prominent/raised gasket mating surface from head to increase compression ratio for the 10-16hp flathead, K-series or Magnum single cylinder engines only. $25.00 labor each, plus return shipping & handling. NOTE: To lessen the chance of a blown or leaking head gasket, clean out the head bolt hole threads with a tap, and seal the head gasket with Copper RTV Silicone Sealant (VersaChem - Mega Copper Silicone, Permatex® Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker or Copper SPRAY-A-GASKET Hi Temp Adhesive Sealant) on each side of the head gasket or cylinder head and engine block to prevent a blown or leaking head gasket. Because engine heat has very little effect on silicone rubber. It's made of fine-ground up heat-transferring compressible copper mixed with silicone. Walmart and most auto parts stores sell copper RTV silicone sealant. It doesn't matter which brand to use, they work the same.

A-1 Miller's Machine Shop Service - Drill out broken off [1/4"] bolt in cylinder head and retap threads for fastening of sheet metal and/or bracket. $10.00 each labor, plus return shipping & handling.

A-1 Miller's Machine Shop Service - Install a Heli-Coil thread repair insert if the spark plug thread hole is not larger than 5/8" in diameter. 304 stainless steel w/200,000 psi tensile strength. Includes resurfacing of air-cooled small engine cylinder head on a wide belt sander to remove warpage and restore flatness. No need to purchase another cylinder head that's in good condition! $15.00 each for parts and labor, plus return shipping & handling.

A-1 Miller's Machine Shop Service - Weld up spark plug hole that's larger than 5/8" diameter, and drill and tap for installation of new spark plug threads. Includes resurfacing of air-cooled small engine cylinder head on a wide belt sander to remove warpage and restore flatness. No need to purchase another cylinder head that's in good condition! $75.00 each for parts and labor, plus return shipping & handling.

Kohler Engine Model K361 Cylinder Head Repairs - Click or tap here for cylinder head bolt torque specs.
  • Repair loose valve seat with a new bronze valve seat. FYI - Bronze grips or adheres to aluminum much better than steel. Plus, it's harder than cast iron. $75.00 each for parts and labor, plus return shipping & handing.
  • Repair worn inside of valve guide with a bronze sleeve insert. $12.00 each for parts and labor, plus return shipping & handing.
  • Replace loose guide valve with an oversize O.D. guide. $40.00 each for parts and labor, plus return shipping & handing.
  • Resurface head gasket mating surface to remove warpage and restore flatness. $20.00 labor, plus return shipping & handing.
  • Perform valve job to OEM specs (regrind both valve faces and seats), install valves, springs, retainers and keepers/locks/collets. $35.00 labor, plus return shipping & handling.

Individual Gaskets and Complete Gasket Kit to Reinstall K361 Cylinder Head on Engine -

  • Head Gasket. High quality aftermarket. Discontinued from Kohler. Replaces Kohler part # 45 052 02-S. $24.00 each, plus shipping & handling.
  • Rocker Arm Housing Gasket. Discontinued from Kohler. NOS OEM Kohler part # 45 041 14-S. $14.40 each, plus shipping & handling.
  • Rocker Arm Cover Gasket. OEM Kohler part # 45 041 09-S. $6.45 each, plus shipping & handling.
  • Two Pushrod Tube Rubber O-Rings s. High quality aftermarket. Replaces Kohler part # 45 153 01-S. $1.00/two, plus shipping & handling.
  • Intake Tube Mounting Gasket. High quality aftermarket. Replaces Kohler part # 271030-S. $1.00 each, plus shipping & handling.
  • All parts above total: $46.85, plus shipping & handling.


Complete engine rebuild gasket set w/oil seals for Kohler K-series model K361 cast iron block single cylinder OHV engine. High quality aftermarket. Discontinued from Kohler. Replaces Kohler part # 45 755 06-S.

  • $50.00 each, plus shipping & handling.


High Quality Aftermarket K361 Valve. Can be used as intake or exhaust valve. Heat-treated, hardened steel. Dimensions: head diameter: 1.437"; overall length: 4.165"±; face angle: 45º. Has 8mm chrome-plated stem. Requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainers or rotators can be used with this valve. OEM valve discontinued from Kohler. Replaces Kohler part #'s 45 016 02-S (intake) and 45 017 01-S (exhaust).

  • Machined by A-1 Miller's. $50.00 each, plus shipping & handling.

NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so the angle will be in correct alignment with the centerline of the valve guides and so the valve face will make a full 360º contact with the seat, or the valves will leak and the engine will lose compression, be hard to start, be low on power and possibly make a popping sound through the carburetor or out the exhaust. And be sure to set the clearances correctly, too.


Valve Guides for Kohler engine model K361 cylinder head.
  • Intake Valve Guide. OEM Kohler part # 45 316 02-S. $14.20 each, plus shipping & handling.
  • Exhaust Valve Guide and Seal Kit. OEM Kohler part # 45 755 11-S. $62.23 per kit, plus shipping & handling.
Crankshaft Repairs - This includes Briggs & Stratton, Kohler, Tecumseh, etc.

Regrind journal (crank pin) to next undersize. NOTE: Kohler crankshafts can be reground to .030" undersize and still be safe to use with matching undersized replaceable bearing inserts installed in the connecting rod. And all crankshafts, rather if they're automotive or small engine, are checked for straightness before grinding. If they're bent or twisted, sometimes they can be straightened. I also do offset crankshaft grinding to increase the length of the stroke at no extra charge. NOTE: Once installed and in operation, there is no warranty or guarantee of any kind on crankshaft regrinds.

  • Single cylinder engine crankshafts: $75.00 per journal, plus return shipping & handling.
  • Two cylinder engine crankshafts: $100.00 per journal, plus return shipping & handling.


"Round Up" Rod Journal(s) and Resize Connecting Rods. The service is for most makes and models of engines when an undersize connecting rod or bearing inserts isn't available, if the crankshaft is worn beyond .010" and needs to be reground again, the journal can be reground to wherever it "cleans up" or is true again, then the connecting rod can be resized so it'll fit the smaller undersize journal with the factory recommended .0025" oil clearance. To resize the rod so it'll fit to a few thousands of an inch smaller diameter crank journal, first, metal is removed from the mating end of the rod cap, then the cap is fasten to the rod. The big hole in the rod is now oblong or "egg shaped." Then the big hole in the rod is honed until it's .002" larger than the diameter of the crank journal. Honing reshapes the hole into a perfect circle again, only smaller in diameter. This works very well and it lasts as long as an ordinary STD size rod and crank journal. This can only be performed on a rod with a good bearing surface. It cannot be done on a burnt or heavily scored connecting rod because too much metal would need to be removed. If you're interested, I will need your crankshaft and connecting rod(s). NOTE - The maximum a connecting rod can be resized to is .005" undersize. If it's resized more than .005", being the big hole in the rod will be made excessively oblong or egg-shaped, which will allow it to make less bearing surface contact around the crank journal after being resized, due to the centrifugal force at 3,600 RPM, the big end of the rod could become elongated (metal stretch) and might eventually knock and possibly break. NOTE: Once installed and in operation, there is no warranty or guarantee of any kind on crankshaft regrinds. An innovative concept by Brian Miller, because nobody else advertise this service .
  • Single cylinder engine crankshafts: $100.00 per journal, plus return shipping & handling.
  • Two cylinder engine crankshafts: $200.00 per journal, plus return shipping & handling.


Repair broken off 5/8" stud on flywheel end of crankshaft. Center drill and cut threads for a 3/8" diameter grade 8 bolt in the end of crankshaft.
  • $25.00 labor, plus return shipping & handling.

Drill hole and cut 7/16-20 UNF (fine thread) threads in the PTO end of the crankshaft for bolt and flat washer.

  • $25.00 labor, plus return shipping & handling.

Solid Motor Mounts for Cub Cadet "Quiet Line" Tractors - Replace Deteriorated "ISO" Rubber Motor Mounts with a Set of Machined Solid Steel Motor Mounts! An original, ingenious, innovative concept invention by Brian Miller, because I was the one who originally thought of, promoted and advertised the use of this product. Please accept no copycat product of this kind. (But I do appreciate them acknowledging my intelligence.)

Details include:


(Added 3/17/20) OEM Cub Cadet Engine Rubber ISO-Mount Kit. Replace deteriorated rubber ISO-mounts to lessen chances of clutch drive plate breakage and so less wear will occur to the clutch assembly. Designed for IH-built Cub Cadet "Quiet Line" models 800, 1000 and 1200, including models 1250, 1450 and 1650 with a hydrostatic disconnect attachment. All of these models have the engine mounted on rails with ISO rubber mounts. These rubber mounts can also be adapted for use on many other makes and models of small engine equipment to reduce engine vibration throughout the frame.


A-1 Miller's Lawn & Garden, Recreational Vehicle/Early Snowmobile Engine Rebuilding and Custom Engine Build-up Services
[Top of Page]
If you would like to purchase any of the parts or services listed in this website, and/or for FREE professional and honest technical assistance and support, please contact: A-1 Miller's Performance Enterprises | 1501 W. Old Plank Rd. | Columbia, MO (Missouri) 65203-9136 USA | Phone: 1-573-256-0313 (shop) | 1-573-881-7229 (cell; text or when leaving a voice message, please speak slowly and clearly). Please call Monday-Friday, except holidays, 9am to 5pm, Central time zone. If no answer, please try again later. (When speaking with Brian, please be patient because I stutter.) A-1 Miller's shop is open to the public from 9am to 5pm, including weekends, except holidays. Please call before coming so I'll be here waiting for your arrival. E-mail: pullingtractor@aol.com. Directions to our shop | 1501 West Old Plank Road, Columbia, MO - Google Maps or Map of 1501 West Old Plank Road, Columbia, MO by MapQuest. If you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's shop to personally drop off and/or pick up your carburetor, clutch assembly, engine, transaxle, tractor, etc. "The road to a friend's house (or shop) is never long." (We're planning to relocate to other property with a bigger and better shop so we can provide many more high quality parts and professional services.)
Information About My Engine Rebuilding Service -

Small engine technology has changed a lot since the Kohler K-series and Magnum engines were made. I can rebuild your lawn and garden engine (or competition pulling engine) with new technological parts so it'll produce more power and last longer than the factory anticipated. I also build engines from scratch and rebuild customer's complete engines from factory stock, to 4,000± RPM governed, to wide open throttle Hot-Stock and Stock-Altered pulling engines. I can build a quality, competition engine for you, or rebuild your engine however you want. Just tell A-1 Miller's know how you're going to use your tractor or equipment and I'll build your engine to suit your needs. And if it's required in your club's rules or not, ALWAYS install a safety shield made of adequate thickness and material for each side of the engine fastened to the tractor frame securely in case of connecting rod failure (Murphy's Law), so an innocent bystander or spectator won't be injured or killed from high-speed projected metal shrapnel.

I don't have any rebuilt Kohler short blocks or engines in stock. And if I did, chances are, they probably wouldn't be designed for your garden tractor or equipment. Because Kohler engines are made specifically to fit a certain model of garden tractor or equipment. They are not a "universal fit" or "one fits all". Therefore, it'll be best to have your engines rebuilt instead. Then all the brackets, accessories and electrical wiring will reconnect to your garden tractor or equipment with no modifications.

Also, I set the air/fuel adjusters on all carburetors just so the engine will start and run, but because of the altitude level, barometric pressure and air temperature where the engine will be used, the customer will need to make the final bore.) OEM so the engine will run smooth. No carburetor with an adjustable high speed main fuel adjuster comes preset, not even new ones.

Furthermore, just to let you know, although I use the best parts, use caution on choosing the right motor oil to use in your engine. Because the government (tree huggers/Sierra club) is requiring oil companies to lessen the amount of zinc in their motor oils to reduce pollution. Zinc provides a protective coating on internal engine parts and prevents metal to metal contact for proper break-in and it helps the parts last longer. Many auto manufacturers and professional engine rebuilders are upset because of this too, because they have to guarantee their engines for a certain period of time, and many of them take pride in building their engines.

Regarding an Engine Build Estimate -

I am very meticulous in how I rebuild and build engines. If you would like to have A-1 Miller's build, rebuild or build-up your engine, I will need a detailed list of exactly what you want done to your engine or a copy of your club's pulling rules regarding the engine requirements before I can give you an estimate on the cost. And if you (the customer), change your mind of how you want the engine built or rebuilt in the middle of a build, I will need to know ahead of time and I will need the changes in writing so I can make the necessary changes to the engine. Otherwise, this will effect how well the engine performs on the track, and it would make me, as a professional engine builder, look bad. It's not a good thing to be afraid that something bad may happen to an engine. Having confidence in an engine makes ya feel good, but having confidence in your engine builder makes ya feel better.

I do not build illegal pulling engines that do not conform to your club's rules! But there are certain other engine builders that offer new pulling engines for sale. BUT, being different pulling associations/clubs have different engine rules and requirements, there is no "one pulling engine that conforms to each and every clubs' rules." Therefore, you may receive an engine that do not conform to your club's rules, and it may be built "above the rules". Meaning it's not legal within your club's rules and is illegal to run in the class you plan to pull it in (cheater engine). Or, the engine in question may be built "below the rules" so it's less competitive as an engine that is built legally to the max according to the rules. But I'll build your engine or an engine for you so it'll produce the maximum horsepower and torque in accordance with your club's rules, not less than what the rules allow. I also rebuild ordinary/stock lawn and garden equipment engines too, such as cast iron and cast aluminum block single- and twin-cylinder flathead, OHV and v-twin Briggs and Stratton, Kohler, Tecumseh and 2-cycle LawnBoy. I've never encountered an engine that I couldn't repair, rebuild or build-up for more power!

Whenever I rebuild or build-up an engine, and if you would like to do so, I do whatever it takes so it'll produce the factory-rated horsepower or the maximum horsepower and torque, and last a long time. I go beyond what the repair manual says to do. I can get all the parts needed, too. I can build your engine so it'll be legal for the class you plan to pull in. And with my engine rebuilds and build-ups, you may not always win, but you'll look good trying! By the way - the surface of the exhaust area of a fresh-built engine may burn off the oil residue for a short time once it gets hot, but it'll stop after a while. It's nothing to worry about. This happens with most rebuilt engines, especially an engine with fresh paint.

FYI - Being I'm the only person to read and respond to all my customer's emails (about 20 or so per day), take my customer's phone call orders (about 20-30 on a nice day with good weather), with customers stopping by my shop, repair and rebuild my customer's parts and engines in my shop, order parts from my suppliers, process orders, package parts then mail customer's parts at my local Post Office, etc., it may take A-1 Miller's several months to rebuild an engine. It takes time to perform precision machine work and manual workmanship on a pulling engine and I wouldn't want to do a rush job. I also have to depend on other local machine shops to balance engine parts and perform various machine work that I can't do myself. All this takes time. So please keep this in mind if you decide to have A-1 Miller's rebuild/build up your engine. Also, I don't like to rush on my customer's repair jobs. I'm very particular about my work, especially my engine builds. I like to take my time to make sure that everything is right, the engine will run right, produce full power and last a long time. I appreciate for you understanding my situation.

FYI - Used OEM parts in good condition for older Kohler engines are hard to find now, especially the small parts. If the parts don't wear, they tend to get thrown away and then "engine scrappers" sell the parts that do wear on places like eBay. They don't think about people like me, who make a living by "piecing together" or building engines from scratch for a customer. I can purchase new parts from Kohler if they're still available, but that would be cost-prohibitive. I try to keep my engine builds at reasonable prices. - Brian Miller

Things that can be done to a 10-16hp Kohler engine to greatly improve overall engine performance are:

  • Mill the head about .050" to raise the compression.
  • Bore the connecting rod offset .020" and install bearing inserts to pop the piston out of the cylinder to raise the compression even more.
  • Enlarge the intake and exhaust ports to increase the airflow.
  • Bore-out the venturi and rework the carburetor to increase the airflow even more. NOTE: The venturi in a Chinese-made Kohler-replicated #26 carburetor can be bored out to is 1.09" or 1-7/64", the same diameter as the throttle bore. But the maximum the venturi in a Chinese-made Kohler-replicated #30 carburetor (which actually has a throttle bore diameter of 29.76mm / 1.17") can be bored-out to is 1". If it's bored-out any bigger centered of the throttle bore, being the #26 and #30 are cast in the same mold and machined the same externally, the boring process will likely break through where the fuel inlet port is, rendering carburetor body useless. But the OEM Kohler #30 carburetor can be bored out to 1.2", the same as the throttle bore, with no risk of breaking into the fuel inlet port. A bored-out venturi and reworked carburetor is when the carburetor is modified for maximum performance for general yard and garden use, and/or for competition pulling.
  • Install stiffer springs for more responsive valve action.
  • Install a heavy steel flywheel to add extra torque.
  • Index the spark plug so the open gap face the center of the piston.
  • Install crank-trigger or flywheel-trigger electronic ignition for a stronger and more stable spark.

Also, all of my customer's pulling engine builds are strictly confidential. This means your competition pulling will not know what goes into your engine!

Below Ê are details and prices to rebuild your engine -
Briggs and Stratton 16, 18 and 20hp opposed (flathead) twin cylinder aluminum block engine (horizontal or vertical shaft) professional rebuild to OEM factory specifications @ 3,600 governed RPM for general lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. NOTE: If your engine doesn't smoke out the exhaust and burn oil, then chances are, all it needs is a professional valve job performed. We can do this instead of rebuilding your engine. The price is $300.00 for parts and labor to perform the valve job, plus return shipping.
  • Rebuild YOUR engine: $700±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats, regrind crank journal and resize connecting rod with the factory recommended .0025" oil clearance, install new matching undersize rod, resurface cylinder head (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness, rebuild carburetor, install tune-up kit, install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable).


Briggs and Stratton Vanguard V-twin aluminum block engine (horizontal or vertical shaft) professional rebuild to OEM factory specifications @ 3,600 governed RPM for general lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • Rebuild YOUR engine: $700±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings), regrind valves and seats, regrind crank journal and resize connecting rod with the factory recommended .0025" oil clearance, install new matching undersize rod or fit connecting rod w/bearing inserts (if available for a particular engine), resurface cylinder heads (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness, rebuild carburetor, install tune-up kit, install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable).
Tecumseh cast iron block engine models VH80, VH100, HH80, HH100, HH120, OH140, OH150, OH160 and OH180 rebuild to OEM factory specifications @ 3,600 governed RPM (for general lawn and garden use only). (Price depends on size of engine and extent of wear.) All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • Rebuild YOUR engine: $700 - $1,000±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats; regrind crank journal and resize connecting rod with the factory recommended .0025" oil clearance, install new matching undersize rod, resurface cylinder head (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness, rebuild carburetor, install tune-up kit, install new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable). Extra charge for A-1 Miller's custom flywheel-trigger electronic ignition system.
Kohler engine models K90/K91 cast iron block flathead engine professional rebuild to OEM factory specifications @ 4,000± governed RPM (for general lawn and garden use). All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • Rebuild YOUR engine: $450±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on extent of wear and availability of rebuild parts. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats; regrind crank journal and resize connecting rod with the factory recommended .0025" oil clearance; resurface cylinder head (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness; rebuild carburetor; install tune-up kit; install new gaskets and oil seals. If engine has a broken connecting rod, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable). Extra charge for A-1 Miller's custom flywheel-trigger electronic ignition system. Price depends on type of electronic ignition system installed.


Kohler engine models K141, K160/K161, K181 and M8 cast iron block flathead engine professional rebuild to OEM factory specifications @ 3,600 governed RPM for general lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • Rebuild YOUR engine: K141, K160/K161, K181 or M8 w/2-7/8" or w/2-15/16" cylinder bore: $600±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; bore cylinder to 2-15/16", install new STD size (2-15/16") piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats; if needed, install valve rotators so any carbon deposits will be wiped away from valve faces and seats to prevent valve burning; regrind crank journal and resize connecting rod with the factory recommended .0025" oil clearance; resurface cylinder head (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness; rebuild carburetor; install tune-up kit; install a snug-fitting neoprene rubber oil seal in governor shaft bushing to prevent leaking oil; new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable). Extra charge for A-1 Miller's custom flywheel-trigger electronic ignition system.


Kohler K-series and Magnum engine models K241, K301, K321, K341, M10, M12, M14 and M16 professional rebuild to OEM factory specifications up to 3,600 governed RPM for general lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $700 - $1,000±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats; if needed, install valve rotators so any carbon deposits will be wiped away from valve faces and seats to prevent valve burning; regrind crank journal and resize connecting rod with the factory recommended .0025" oil clearance or install new matching undersize rod or fit connecting rod w/bearing inserts; install main ball bearings if the old ones are worn; resurface cylinder head to remove warpage and restore flatness; rebuild carburetor; install tune-up kit; install a snug-fitting neoprene rubber oil seal in governor shaft bushing to prevent leaking oil; new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable). Extra charge for A-1 Miller's custom flywheel-trigger electronic ignition system. Price depends on type of electronic ignition system installed.


Kohler K-series or Magnum engine models K241/M10, K301/M12, K321/M14 and K341/M16 Stock-Appearing professional build to the max up to 4,000± RPM for heavy lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $700 - $1,000±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats; install medium performance valve springs; regrind crank journal and install bearing inserts in connecting rod; mill cylinder head; rebuild or bore-out and rework carburetor; install tune-up kit, install a snug-fitting neoprene rubber oil seal in governor shaft bushing to prevent leaking oil; new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable). Extra charge for A-1 Miller's custom flywheel-trigger electronic ignition system. Price depends on type of electronic ignition system installed. (K-series engines only.)


Kohler K-series engine model K361 OHV professional rebuild to OEM factory specifications up to 3,600 governed RPM for general lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.
  • Rebuild YOUR engine: $800 - $1,000±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston/rings assembly or bore cylinder and install new oversize piston/rings assembly (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats; regrind crank journal and resize connecting rod with the factory recommended .0025" oil clearance or install new matching undersize rod or fit connecting rod w/bearing inserts; resurface cylinder head (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness; rebuild carburetor; install tune-up kit; install a snug-fitting neoprene rubber oil seal in governor shaft bushing to prevent leaking oil; new gaskets and oil seals. If engine has a broken connecting rod or rods, and internal damage has resulted, the price will be slightly higher for additional parts and labor (if rebuildable). Extra charge for A-1 Miller's custom flywheel-trigger electronic ignition system. Price depends on type of electronic ignition system installed.
Perform Professional Valve Job Only on Kohler Engine Model K361 Cylinder Head. This service is for an engine that does not blow blue smoke out the exhaust and burn oil. Performing a professional valve job restores full compression, which allows the engine to start quicker, idle smooth without stalling, and it will have maximum power at top governed speed. Click or tap here for cylinder head bolt torque specs.
  • Repair loose valve seat with a new bronze valve seat. FYI - Bronze grips or adheres to aluminum much better than steel. Plus, it's harder than cast iron. $75.00 each for parts and labor, plus return shipping & handing.
  • Repair worn inside of valve guide with a bronze sleeve insert. $12.00 each for parts and labor, plus return shipping & handing.
  • Replace loose guide valve with an oversize O.D. guide. $40.00 each for parts and labor, plus return shipping & handing.
  • Resurface head gasket mating surface to remove warpage and restore flatness. $20.00 labor, plus return shipping & handing.
  • Perform valve job to OEM specs (regrind both valve faces and seats), install valves, springs, retainers and keepers/locks/collets. $35.00 labor, plus return shipping & handling.

Individual Gaskets and Complete Gasket Kit to Reinstall K361 Cylinder Head on Engine -

  • Head Gasket. High quality aftermarket. Discontinued from Kohler. Replaces Kohler part # 45 052 02-S. $24.00 each, plus shipping & handling.
  • Rocker Arm Housing Gasket. Discontinued from Kohler. NOS OEM Kohler part # 45 041 14-S. $14.40 each, plus shipping & handling.
  • Rocker Arm Cover Gasket. OEM Kohler part # 45 041 09-S. $6.45 each, plus shipping & handling.
  • Two Pushrod Tube Rubber O-Rings s. High quality aftermarket. Replaces Kohler part # 45 153 01-S. $1.00/two, plus shipping & handling.
  • Intake Tube Mounting Gasket. High quality aftermarket. Replaces Kohler part # 271030-S. $1.00 each, plus shipping & handling.
  • All parts above total: $46.85, plus shipping & handling.


Complete engine rebuild gasket set w/oil seals for Kohler K-series model K361 cast iron block single cylinder OHV engine. High quality aftermarket. Discontinued from Kohler. Replaces Kohler part # 45 755 06-S.

  • $50.00 each, plus shipping & handling.


High Quality Aftermarket K361 Valve. Can be used as intake or exhaust valve. Heat-treated, hardened steel. Dimensions: head diameter: 1.437"; overall length: 4.165"±; face angle: 45º. Has 8mm chrome-plated stem. Requires 8mm reamer to enlarge guide. OEM Kohler valve keepers/locks/collets and retainers or rotators can be used with this valve. OEM valve discontinued from Kohler. Replaces Kohler part #'s 45 016 02-S (intake) and 45 017 01-S (exhaust).

  • Machined by A-1 Miller's. $50.00 each, plus shipping & handling.

NOTE: Before lapping in valves, it's best to have the valve seats recut or reground so the angle will be in correct alignment with the centerline of the valve guides and so the valve face will make a full 360º contact with the seat, or the valves will leak and the engine will lose compression, be hard to start, be low on power and possibly make a popping sound through the carburetor or out the exhaust. And be sure to set the clearances correctly, too.


Valve Guides for Kohler engine model K361 cylinder head.
  • Intake Valve Guide. OEM Kohler part # 45 316 02-S. $14.20 each, plus shipping & handling.
  • Exhaust Valve Guide and Seal Kit. OEM Kohler part # 45 755 11-S. $62.23 per kit, plus shipping & handling.


Kohler KT-series and Magnum opposed (flathead) twin cylinder engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20. Professional rebuild to OEM factory specifications @ up to 3,600 governed RPM for general lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Complete Engine Rebuild. Rebuild YOUR engine: $700 - $1,000±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston rings, or bore cylinders and install new oversize piston/rings assemblies (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats, install new valve guides (if needed), resurface cylinder heads (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness; rebuild carburetor, install new gaskets and oil seals and install new tune-up kit. If engine was run out of oil and have a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). If one or both cylinders are scored and needs to be replaced with new piston and rings, the price will be slightly higher. But cylinder scoring is rare. If either cylinder wall and/or piston(s) is/are scored and needs replacing, the price will be slightly higher. For these type of engines, we don't have the cylinders bored oversize and install new oversize piston and rings because this would be too cost prohibitive being we have good used cylinders and pistons in stock. Add $150.00 for installation of A-1 Miller's custom flywheel-trigger electronic ignition system. (KT-series engines only.)
  • Perform Professional Valve Job Only on opposed (flathead) twin cylinder Kohler KT-series and Magnum engine models KT17, KT17 Series II, KT19, KT19 Series II, MV16, M18, MV18, M20 and MV20. This service is for an engine that does not blow blue smoke out the exhaust and burn oil. Performing a professional valve job restores full compression, which allows the engine to start quicker, idle smooth without stalling, and it will have maximum power at top governed speed. Labor includes: regrind four valve faces and seats, lap in valves with valve lapping compound, reset valve clearances to factory specifications (on short block only), resurface both cylinder heads on a wide sanding belt to remove warpage and restore flatness, reinstall intake manifold and governor linkage. And being some valve guides wear beyond specifications, there will be an extra charge for installing and reaming new guides, if needed. The sheet metal, muffler, intake manifold and governor linkage will need to be removed before bringing or shipping engine/short block to A-1 Miller's shop. To save on shipping cost, only the cylinders (removed from crankcase) and valves can be shipped in a USPS Large Flat Rate Box. Use two boxes - place one box inside the another to double the strength, and use rigid packing material to prevent the cooling fins from breaking off by making contact with each cylinder. But the short block must be shipped in a sturdy wooden crate. Or if you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's shop to personally drop off and/or pick up your carburetor, clutch assembly, cylinders, engine, transaxle, tractor, etc. "The road to a friend's house (or shop) is never long." A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Perform Valve Job on 2 Cylinders Only. (Customer resets valve clearances.) $70.00 labor, plus return shipping & handling.
    • Perform Valve Job on Short Block (sheet metal, intake manifold and governor linkage removed). $200.00 labor, plus return shipping with Fastenal or FedEx Ground.
    • And being some valve guides wear beyond specifications, there will be an extra parts and labor charge for installing and reaming new guides, if needed.


Kohler engine models K482, K532 and K582 opposed (flathead) twin cylinder (flathead) engines. Professional rebuild to OEM factory specifications @ up to 3,600 governed RPM for general lawn and garden use or mild competition pulling. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. NOTE: If your engine doesn't smoke out the exhaust and burn oil, but looses power, then chances are all it needs is a professional tune-up and valve job performed. We can do this instead of rebuilding your engine. The price is $300.00 for parts and labor to perform the valve job, plus return shipping.

  • Rebuild YOUR engine: $1,200±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.
    • Parts and labor includes: Completely disassemble engine, thoroughly clean the block & all associated parts; install new STD size piston rings, or bore cylinders and install new oversize piston/rings assemblies (price will be higher for the boring and with a new oversize piston and rings); regrind valves and seats, install new valve guides (if needed), resurface cylinder heads (on large disc sander or wide, flat belt sander) to remove warpage and restore flatness; rebuild carburetor, install new gaskets and oil seals and install new tune-up kit. If engine was run out of oil and have a broken connecting rod or rods, and internal damage has resulted, the price will be higher for additional parts and labor (if rebuildable). If one or both cylinders are scored and needs to be bored oversize with new oversize piston and rings, the price will be slightly higher.


Kohler Command and Command Pro V-Twin Engine Models CH18, CH20, CH22, CH23, CH25, CH620, CH621, CH640, CH641, CH670, CH680, CH730, CH740, CH750, CH940, CH960, CH980, CH1000, CV16, CV17, CV18, CV20, CV22, CV25, CV620, CV640, CV670, CV680, CV730 and CV740. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $700 - $1,000±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.


Generac V-Twin Engine Models 005682-0, 0E3480, 0E4328, 389cc, 5625-0, GH-220, GH-410, GN-190, GN-220, GN-320, GN-360, GN-410, GT-760, GT-990, GTH-990, GTV-760 and GTV-990. NOTE: As long as new replacement parts are available, these engines can be rebuilt. All sheet metal will need to be removed before bringing or shipping engine to A-1 Miller's. Engine must be shipped in a sturdy wooden crate. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Rebuild YOUR engine: $700 - $1,000±, includes high quality parts and labor, plus return shipping with Fastenal or FedEx Ground. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. Price depends on model of engine and extent of wear. A 50% deposit may be required on certain engine rebuilds. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine rebuild.

A-1 Miller's Kohler Competition Pulling Engine Building | [Top of Page]

Garden tractor pulling engine technology has changed a lot through the years. We can rebuild your competition pulling engine with new technological parts so it'll produce more power, be more competitive on the track and last longer than anticipated.

The below Ê are high output engines, built and designed for competition pulling only, not general lawn and garden use. No charging system included. 10hp (K241), 12hp (K301), 14hp (K321) or 16hp (K341) Kohler engines built by Brian Miller.

The "Built to the Max" Stock class engines runs at 4,000± governed RPM; has a 9-1/2" cast flywheel with majority of fins removed then dynamically and precision spin-balanced; high torque upper mount gear starter (mounting bolts are below the starter motor); performance valve job with stock size valves; A-1 Miller's reground/torque cam; medium performance valve springs; #26 or #30 Kohler carburetor (depending on engine size) bored-out, reworked and set up for gas; enlarged ports and polished (intake port made larger only if it is smaller in diameter than the carburetor throttle bore); 2nd or 3rd generation cylinder head milled .050"; connecting rod bored .020" offset for piston pop out with bearing inserts. Also included are: flywheel shroud (not chrome plated), cast iron or aluminum oil pan, bolt-on header pipe and conventional Kohler point ignition system installed with ignition timing preset. And being there is no oil filter on Kohler cast iron block engines, an oil drain plug with a very strong rare earth/neodymium magnet, or a very strong rare earth/neodymium magnet will be glued to the inside bottom of the oil pan or engine base to attract and remove ferrous metallic wear fragments from the motor oil to clean the oil so the engine will last much longer. Because some of the ferrous metal wear fragments settle to the bottom of the oil pan or engine block and do not drain out with the oil when performing an oil change, even when the oil is hot. An innovative and ingenious concept by Brian Miller because nobody else advertise this trick online for a pulling engine.

A-1 Miller's rebuilt engines will be painted with high quality gloss black, unless the customer specifies a different color or no paint at all. When you receive the engine, install it in the tractor, add motor oil to the proper level, install the fuel hose, add fuel, connect the ignition and starter wires, connect the throttle controls, and the engine will be ready to start. Carburetor adjustments will be initially preset, but due to the altitude level, barometric pressure and air temperature, final idle speed, idle air/fuel mixture and high speed air/fuel mixture adjustments may need to be made after the engine is started and warmed up. It'll have no charging system. Use a remote battery charger to recharge the battery before each pulling event.

4,000 RPM "Built to the Max" Stock-Appearing Pulling Engines below - built for competition pulling only and to your pulling association/club's sanctioning rules. In addition to all the essentials, prices below include a heavy (ring gear) steel flywheel and new high torque gear starter motor (Kohler style). Custom crank trigger ignition or $100 to build a sturdy wooden shipping crate and shipping & handling is extra charge. Or you can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines.

  • Build to the Max 10hp Kohler Engine. Dyno'd at 15hp± @ 4,000 RPM and 19± ft. lbs. of torque @ 4,000 RPM. Horsepower/torque and price depends on how the engine is built. (Past engines test ran on A-1 Miller's personal dynamometer with accurate results.)
    • If customer provides engine block and most parts. $2,000±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $3,000±.
  • Build to the Max 10hp 27 CID Hybrid Stroker Engine. Dyno'd at 19hp± @ 4,000 RPM and 25± ft. lbs. of torque @ 4,000 RPM. (Past engines test ran on A-1 Miller's personal dynamometer with accurate results.)
    • If customer provides engine block and most parts. $2,300±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $3,100±.
  • Build to the Max 12hp Kohler Engine. Dyno'd at 22hp± @ 4,000 RPM and 29± ft. lbs. of torque @ 4,000 RPM. Horsepower/torque and price depends on how the engine is built. (Past engines test ran on A-1 Miller's personal dynamometer with accurate results.)
    • If customer provides engine block and most parts. $2,000±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $3,000±.
  • Build to the Max 14hp Kohler Engine. Dyno'd at 25hp± @ 4,000 RPM and 33± ft. lbs. of torque @ 4,000 RPM. Horsepower/torque and price depends on how the engine is built. (Past engines test ran on A-1 Miller's personal dynamometer with accurate results.)
    • If customer provides engine block and most parts. $2,000±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $3,000±.
  • Build to the Max 16hp Kohler Engine. Dyno'd at 28hp± @ 4,000 RPM and 37± ft. lbs. of torque @ 4,000 RPM. Horsepower/torque and price depends on how the engine is built. (Past engines test ran on A-1 Miller's personal dynamometer with accurate results.)
    • If customer provides engine block and most parts. $2,300±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $3,300±.


Hot Stock or Sport Stock Pulling Engines - built to your pulling association/club's sanctioning rules. The Hot Stock class engines has an OEM Kohler block; runs at wide open throttle (no governor); 9-1/2" 25 lb. steel flywheel; high torque upper mount gear starter (mounting bolts are below the starter motor); A-1 Miller's Hot Stock/Stock-Altered welded-up and reground cast camshaft; single high performance valve springs; performance valve job with stock size valves; #26 or #30 Kohler carburetor (depending on engine size) bored-out, reworked, set up for gas with bottom main fuel adjuster; enlarged ports and polished (if the intake port is smaller in diameter than the carburetor throttle bore); 2nd or 3rd generation cylinder head milled .050"; connecting rod bored .020" offset for piston pop out with bearing inserts; rotating assembly (crankshaft and connecting rod/piston assembly) precision spin-balanced to reduce engine vibration. Also included are: flywheel shroud (not chrome plated), cast iron oil pan, bolt-on header pipe and conventional Kohler point ignition system installed with ignition timing preset. Upon receiving engine, install in tractor, add fluids and engine will be ready to start after all connections are made. Carburetor adjustments will be initially preset, but due to the altitude level, barometric pressure and air temperature, final adjustments may need to be made after engine is started. Prices below Ê do not include $100 for crating and shipping & handling. You can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges. IMPORTANT: Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. Add $110.00 - $152.00 for installation of A-1 Miller's custom crank trigger or flywheel triggered electronic ignition system.

  • Hot Stock or Sport Stock - 12hp Kohler engine block. Dyno'd at 48hp± and 39± ft. lbs. of torque @ 6,500 RPM. (Past engines test ran on A-1 Miller's personal dynamometer.)
    • If customer provides engine block and most parts. $2,200±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $3,500±.
  • Hot Stock or Sport Stock - 14hp Kohler engine block. Dyno'd at 50hp± and 41± ft. lbs. of torque @ 6,500 RPM. (Past engines test ran on A-1 Miller's personal dynamometer.)
    • If customer provides engine block and most parts. $2,400±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $3,500±.
  • Hot Stock or Sport Stock - 16hp Kohler engine block. Dyno'd at 53hp± and 44± ft. lbs. of torque @ 6,500 RPM. (Past engines test ran on A-1 Miller's personal dynamometer.)
    • If customer provides engine block and most parts. $2,600±. NOTE: All parts must be new or in good, usable condition.
    • If A-1 Miller provides engine block and all parts. $4,000±. NOTE: Price will be higher if an aftermarket block is used.


Competition Pulling Engine Freshening Service Ê This service is for competition pulling engines only that have been previously built, and needs the basic parts and labor to revive the power. It is not a complete engine rebuild. A typical pulling engine will last an average of 25 pulls or 3 years of use. After that, the piston rings become worn, and the engine may lose power when under load and puff gray/blue smoke out the exhaust and/or crankcase breather vent. When this happens, it's time for a freshening job. If interested, we will need an updated copy of your association/club's engine rules so when the engine is freshened, it will be legal in its class, but still competitive. Click or tap here for proper break-in (wear-in) oils and procedure for rebuilt engines. Add $110.00 - $152.00 for installation of A-1 Miller's custom crank trigger or flywheel triggered electronic ignition system. (For competition pulling only.) A 50% deposit may be required on certain engine refresh jobs. Deposit is non-refundable if labor and machine work is invested in the engine, and parts are purchased for the engine. Remaining balance of total amount is due upon completion of engine refresh. [Top of Page]

Freshen Stock "Built to the Max" 10-16hp 4,000± RPM governed Kohler pulling engine. Includes install new high quality ring set or piston and rings; clean and reseat valves or perform 3-angle high flow performance valve job; install new bearing inserts; clean, rebuild or bore-out/rework carburetor; mill the cylinder head; install our reground 4,000 RPM torque performance camshaft; new gaskets and oil seals. Total price depends on which parts & how much labor the engine needs, plus return shipping with Fastenal or FedEx Ground.

Freshen Hot-Stock 12-16hp Kohler engine. Includes install new high quality ring set or piston and rings; clean and reseat valves or perform 3-angle high flow performance valve job; new bearing inserts; clean, rebuild or bore-out/rework carburetor; if needed, install our welded up and reground Hot-Stock/Stock-Altered performance camshaft; new gaskets and oil seals. Total price depends on which parts & how much labor the engine needs, plus return shipping with Fastenal or FedEx Ground.

Please contact A-1 Miller's if you're interested in any of the above È parts or services.

IMPORTANT! Break-In (Wear-In) Oils and Procedure for Ordinary Rebuilt (Lawn and Garden) Engines -

First of all, full synthetic/organic motor oil will allow an engine to run cooler and last longer. But the rule of thumb for different types of motor oils are: Full synthetic motor oil is mainly for high performance/racing engines that operate at high RPMs for a long time. Synthetic blend motor oil, which is a blend of about 50% organic and 50% petroleum, is for engines that occasionally operate at high RPMs, but also operate at normal speeds. And conventional/petroleum motor oil is safe to use just for engines that operate at normal speeds at all times.

Break-In (Wear-In) Oils and Procedure for Fresh-Built Pulling Engines -

For proper break-in (wear-in) of a rebuilt or fresh built pulling engine, use a high quality conventional (petroleum-based) SAE 30 weight motor oil containing a high zinc content anti-wear additive, such as ZDDP (Zinc dithiophosphate), which places a protective coating between all internal moving parts, will get hot, create a wear pattern and produce a hardened surface, especially flat tappet lifters and camshaft lobes. Don't be afraid to run a fresh-built or freshly rebuilt pulling engine at speeds it is designed for. Just run the engine normally for 4-5 pulls. Do not allow the engine to idle at a slow speed (below 1,200 RPM) for a long period of time to break it in! It needs to run at full governed speed (3,200 or 3,600 RPMs) so the oil dipper on the connecting rod can splash the crankcase oil up and thoroughly lubricate/coat critical moving parts. And it's good to set the idle on the high side regardless of the type of oiling system (splash or oil pump) so the flywheel fins will blow more cool air over the engine. Then drain the oil while it's hot, and either continue to use ordinary SAE 30 oil, or switch to a quality 20W50 synthetic blend or full synthetic oil. Use no oil additives. Change the oil every 25 pulls or once a year. Synthetic-blend oils get about half as hot as conventional oils. But full synthetic oils don't get near as hot as conventional oils do. It's more slippery and remains cooler even after the engine have been in operation for several hours to better protect internal parts for longer engine life.

If the tractor is geared correctly, the pulling engines I build should not run out of power at the end of the pull. It should spin the tires. But there's some things that needs to be checked after a few pulls as the engine breaks-in and parts wear into each other. For gas fuels, the ignition timing needs to be set at 22º BTDC. And make sure the high speed air/fuel mixture screw is set so the engine runs smooth at high RPM. Also, if a high-output/performance ignition coil is used, it requires two standard capacity (Kohler) condensers/capacitors or one heavy duty, high capacity/performance condenser/capacitor. This is so the coil will produce more voltage. And with a high-output/performance coil, the spark plug gap can be set at .060". With an ordinary coil, it should be set at .035". The valve to lifter clearances may need to be reset at .010" for the intake and .014" for the exhaust.

Furthermore, when a new or rebuilt engine needs to "break-in", what the term "break-in" actually means is the moving internal parts that make contact with each other needs to "wear-in" with each other so they'll produce a wear pattern and last longer. Any new or rebuilt engine, rather if it's for general lawn and garden use or for competition pulling, needs to fully break-in (wear-in) for it to produce full power. Rings don't "seat," they break-in (wear-in), or wear-in with the cylinder wall, and they wear-in quickly. But the valves are the parts that needs to "seat." Being the valve faces and seats have different angles (30º/31º or 45º/46º, respectively), the valve faces needs to wear into the seats to seal in the compression 100%. Wear-in will produce a 30½º or 45½º angle on both the matching valve face and seat. The harder material the valves are made of, the longer it takes for them to "seat" or wear-into the seats. Some pullers tell A-1 Miller's that the engines I built for them run better every time they pull them. I remember a few years ago when I performed a valve job on my truck engine. It ran good and produced plenty of power, but I noticed after about 1,000 or so miles, it produced a little more power. I realized that this is because the valve faces wore into the seats, forming a perfect seal. So again, a fresh-built pulling engine will not produce full power the first few times it's ran. Go here for more information: Valvoline.com FAQs Motor Oil Car Racing Oil. [Return to Previous Section, Paragraph or Website]

NOTES:

Ship the Engine in a Sturdy Wooden Crate - [Return To Previous Paragraph, Section or Website]

IMPORTANT! If you bring an engine to A-1 Miller's in person, place it in an old automotive tire to keep it from moving around during transportation. And please let A-1 Miller's know first so I can expect your arrival. But if you decide to ship your engine to me, I don't need everything on it. Just the parts that can wear and need rebuilding or reconditioning, such as the gear starter, cylinder head(s), crankcase breather assembly, fuel pump and carburetor. I need the oil pan on it too, to prevent any dust and dirt from entering the crankcase after the rebuild. Please remove all sheet metal and PTO clutch/pulley, too. I'll need the flywheel on the engine so I can set the ignition timing. Please send or bring your engine when you're ready to the address below Ê. By the way - I have a heavy duty 2-jaw gear puller that we use with a large c-clamp to remove the mechanical PTO clutch/pulley from Cub Cadet engines. But sometimes these clutch/pulleys will not remove without breaking. I do all I can to try to prevent this from happening, but when they do break, I have no choice but to install a rebuilt PTO clutch/pulley assembly. I also made a special puller tool to remove the large stamped steel PTO pulley from the crankshaft without damage.

To ship your engine to A-1 Miller's, first off, do not use the USPS, UPS or FedEx Express! We and our customers have had too many problems with these shippers in the past. Their clumsy, incompetent and uncaring "gorilla" workers have a tendency to damage heavy items, and the shipping company's insurance never pay off. The shipping company claim that the damaged item, which was in their possession, is "not their fault." They are very careless with heavy packages when they handle them. The packages are placed on conveyor-belt systems and they seem to always drop the heavy ones off of the elevated conveyors, which usually destroys whatever is inside them. If you're the kind of person who don't trust delivery/shipping companies (mis)handling your [irreplaceable] high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's shop to personally drop off and/or pick up your engine, transaxle, tractor, etc., for modifying, rebuilding or repairs.

If shipping an engine, and if the crated engine weighs no more than 150 lbs., use only Fastenal or FedEx Ground for dependability. The average crated cast iron block Kohler engine weighs just under 150 lbs. Use this website to calculate the shipping cost for your engine: FedEx Rates and Transit Times. Contact your local Fastenal or FedEx Ground shipping center for more details and to schedule a pickup or drop off the crated engine at your local Fastenal or FedEx Ground shipping center. Fastenal and FedEx Ground are the only reasonably-priced shipping service that I know of for items up to 150 lbs. US Mail only ship up to 70 lbs. And FedEx Freight would cost almost as much as an engine is worth. If your engine is too heavy to go with FedEx Ground, partially disassemble it and send the lightweight parts in a USPS Large or Medium Flat Rate Box, and then send the main short block with FedEx Ground, the crated engine can be shipped through Fastenal. This also works better to save money on shipping costs. You can visit A-1 Miller's shop to drop off and pick up your engine to save on crating and shipping charges.

Do not use a cardboard box alone the ship a heavy engine! Crate it well and any other parts with it securely so they won't get damaged or lost in shipping. A sturdy and well-constructed wooden crate can be ordered from: Crates, Wooden Crate in Stock - ULINE. But to construct your own sturdy wooden shipping crate, use 2x2's or 2x4's lumber for the frame work, with 1/4" plywood or 1/2" chipboard as outer covering (do not use cardboard for covering because another person's package could penetrate it and cause damage the engine inside), and a couple of 2x4's or a cut-down shipping pallet on the bottom so a forklift can move it without damage. Make the crate compact as possible so it'll take up less space, save on shipping charges and so it'll be easier to move around in our shop. Fasten the engine oil pan mounting bolt holes to two sturdy 2x4's on the base of the crate securely with 3/8" diameter bolts with wide flat washers. It's also very important to install 2x4 wood bracing all around the engine cylinder (front, rear and each side) stabilize it in the crate. And for easy engine removal, PLEASE use Phillips head drywall/sheetrock screws or better yet, use hex head 1/4" lag bolts w/flat washers to fasten everything on and in the crate. Be sure to include a note in a sealed plastic bag with your name, complete and correct postal address, phone number, email address (in case I have any questions) and a detailed description of how you want the engine built and what it will be used for, and mention in the note any other parts you may need.

When the work is completed, I'll contact you with the total including return shipping & handling. For payment options for parts ordered or services performed, or to make a donation to my websites, I accept cash (in person), USPS Postal Money Orders, cashier's checks, business checks, MasterCard, VISA, Discover, American Express (please add 2.5% to the total for the credit/debit card processor's surcharge), Western Union Money Transfer or MoneyGram Money Transfers. (If the engine is for a specific purpose and parts must be special ordered, full payment will be required right after your order is placed or your debit/credit card will be charged for the full amount or as a deposit.) Or you can pay A-1 Miller's through PayPal. My PayPal account name is my email address, and be sure to mention in PayPal a description of what the payment is for. If sending a money order or cashier's check, please include a note in the envelope with your name, complete mailing address, phone number and a description of what the payment is for. My mailing address and phone number are below Ê. And I will ship your rebuilt engine/parts to you as soon as I receive your payment.

To ship a transaxle, this is easier. They don't require an enclosed crate. Just place the transaxle on the center of a shipping pallet (of the appropriate size) and stretch wrap (use low-cost ratchet nylon tie-downs) to securely fasten it to the pallet. Use at least 6 layers of stretch wrap or several tie-downs. This should work really well. The shipping weight of a Cub Cadet cast iron case transaxle when strapped to a wooden pallet is approximately 215 lbs. [Return To Previous Paragraph, Section or Website]


A-1 Miller's Computerized Stuska Water Brake Engine Dynamometer (Dyno) Service with DPM Data Logger Software to Test Horsepower and Torque! | [Top of Page]

For performance testing of 10-16hp single cylinder Kohler stock or competition pulling engines at speeds up to 12,000 RPM. 100% accurate, customers can rent dyno time, fine tune and make adjustments or changes to their engines to gain maximum horsepower and torque, and print-out the results so their tractor(s) will be truly competitive on the track. With an engine dyno, the puller can adjust their engine to get maximum horsepower and torque, and gear their tractor appropriately to have an advantage over the competition. NOTE: A fresh-built engine may not produce full power until it's broke-in. This is when the valves wear-in with the seats to completely seal in the compression. The rings will likely hold the compression, but the valves may leak slightly until they wear into the seats. This is normal for all engines and may take several hours or pulls to happen, then the valves will be able to hold full compression. Lots of pullers tell A-1 Miller's after I've built their engines that it seems to pull stronger every time they pull it.

Engine Dyno Rental Fee: $50.00 per hour run time from the moment the engine is started. No setup fee for Cub Cadet engines with a 3- or 6-pin/stud clutch driver. An adapter may need to be needed or fabricated for other makes and models of engines. Only engines with the narrow base oil pan can be tested. Engines with the wide base (tall) oil pan cannot be tested at this time. [Return to Previous Section, Paragraph or Website]


Coming Soon - Detailed Illustrated Plans on How to Construct a Professional Pull-Back and Self-Propelled Garden Tractor Pulling Sled. FYI - The professionally-built self-propelled pulling sled is the only one I've ever built (click the picture to the right to see a larger image of this sled), and I got it right the first time, with very few changes or modifications that had to be made to it. I guess I'm just one of those kind of guys that knows what he's doing. Pullers really like pulling our sled, too. They say it's the best sled they've ever pulled. (Not bragging, just stating a fact.) By the way - Track Master sled is engineered so well (by Brian Miller), that other sled builders/owners have copied my well thought-out and proven design. And I do appreciate them acknowledging my intelligence. Anyway, I have lots of work to do in my shop and I work on the sled plans in my spare time. As soon as my plans with an inventory list of parts to use are perfected, I'll post the update in my websites with the prices of the plans. Remember - Perfection takes time. If it's worth having, it's worth waiting for. Also, I plan to acquire a bigger shop and may build high quality garden tractor pulling sleds in the future to offer for sale. Please call 573-256-0313 (shop) or 573-881-7229 (cell; text or voice message), or email pullingtractor@aol.com if interested. - Brian Miller


If you would like to purchase any of the parts or services listed in this website, and/or for FREE professional and honest technical assistance and support, please contact: A-1 Miller's Performance Enterprises | 1501 W. Old Plank Rd. | Columbia, MO (Missouri) 65203-9136 USA | Phone: 1-573-256-0313 (shop) | 1-573-881-7229 (cell; text or when leaving a voice message, please speak slowly and clearly). Please call Monday-Friday, except holidays, 9am to 5pm, Central time zone. If no answer, please try again later. (When speaking with Brian, please be patient because I stutter.) E-mail: pullingtractor@aol.com. When you call, text, email or visit our shop, you will be dealing directly with the owner for the best customer service. A-1 Miller's shop is open to the public from 9am to 5pm, including weekends, except holidays. Please call before coming so I'll be here waiting for your arrival. Directions to our shop | 1501 West Old Plank Road, Columbia, MO - Google Maps or Map of 1501 West Old Plank Road, Columbia, MO by MapQuest. If you're the kind of person who don't trust delivery/shipping companies (mis)handling your high-dollar and fragile merchandise, you can make the long drive to A-1 Miller's shop to personally drop off and/or pick up your carburetor, clutch assembly, engine, transaxle, tractor, etc. "The road to a friend's house (or shop) is never long." (We're planning to relocate to other property with a bigger and better shop so we can provide many more high quality parts and professional services.) [Return To Previous Paragraph, Section or Website]

We Ship to Canada and Worldwide -
Item(s) in a package or cushioned envelope weighing less than 1 lb. is sent by US Postal Service Airmail Letter Post for a 4-7 days delivery. Packaged item(s) weighing over 1 lb. and up to 66 lb. is sent by US Postal Service Airmail Parcel Post for a 4-10 days delivery. I cannot use the US Postal Services' Flat Rate Priority Mail envelopes and boxes to ship outside U.S. territories. Item(s) weighing over 67 lbs. or more is sent by FedEx Ground or equivalent services. We try to keep our shipping cost to customers within reason. Therefore, we don't ship our products in a fancy-looking package with our company name and/or logo on it because most customers will just toss it in the trash after they remove the contents.


We Accept PayPal, Visa, MasterCard, American Express & Discover Credit & Debit Cards
(When placing an order through PayPal, please provide a list of which parts you need.)

To make a payment to A-1 Miller's through PayPal, go to PayPal's secure website ( https://www.paypal.com/ ) and click on Send and Request -> Pay for goods or services. Type in my email address, or copy and paste this: pullingtractor@aol.com, the amount and follow the directions. Be sure to mention in PayPal a description of what the payment is for. After you've finished, PayPal will send A-1 Miller's an email notifying me that you have made a payment to A-1 Miller's for the product(s) or services and amount entered. Then I go to their website and direct PayPal to deposit the money in my bank account. And I will send the parts to you as soon as I receive your payment. But I may have to order some of the parts if they're not in stock, which should take a few days. In that case, I will send you the parts as soon as they come in. PayPal protects your financial privacy and security. With PayPal, privacy is built in. It's a way for you to pay without exposing their financial information.