Specifications
Ratings spec sheet not in our library yet — see the documents below.
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Wash and reoil in clean fresh engine oil | — | 100 hr | ||
| Fuel filter | Kohler and Walbro carburetors | — | |||
| Oil | API Service Class SF or SG, straight 30-weight | — | 25 hr | ||
| Spark plug | Champion or equivalent | — | 100 hr |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Service intervals
9| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Oil | Change | 25 hr | First service — New or overhauled engine: change after first 5 hours | |
| Foam Precleaner | Clean | 25 hr | More frequently under dusty conditions | |
| Cooling Fins and External Surfaces | Clean | 50 hr | More frequently under dusty conditions | |
| Optional Reduction Gear Unit | Check | 50 hr | Check oil level | |
| Paper Air Cleaner Element | Clean | 100 hr | ||
| Spark Plug | Check | 100 hr | Reset gap or replace as necessary | |
| Cylinder Head and Combustion Chamber | Clean | 500 hr | 250 Hours when leaded gasoline is used | |
| Starter Motor Drive | Lubricate | 500 hr | 12 mo | Annually or 500 hours, whichever occurs first |
| Valve-To-Tappet Clearance | Check | 500 hr | Engine must be cold |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
53| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Balance gear end play | .002/.010 | in | |
| Clearance | Camshaft end play | .005/.010 | in | |
| Clearance | Crankshaft end play | .002/.023 | in | |
| Clearance | Crankshaft end play | .003/.020 | in | |
| Clearance | Cylinder head flatness (max variance) | .003 | in | |
| Clearance | Piston ring end gap (new) | .007/.017 | in | |
| Clearance | Piston ring end gap (new) | .010/.020 | in | |
| Clearance | Piston ring side clearance (max) | .006 | in | |
| Clearance | Piston-to-bore clearance (style A piston) | .007/.010 | in | |
| Clearance | Piston-to-bore clearance (style C piston) | .003/.005 | in | |
| Clearance | Piston-to-bore clearance (style D piston) | .0034/.0051 | in | |
| Clearance | Valve guide to valve stem clearance (exhaust) | .008 | in | max |
| Clearance | Valve guide to valve stem clearance (intake) | .006 | in | max |
| Gap | Carburetor float drop | 1-1/32 | in | |
| Gap | Carburetor float level | 11/64 (+ 1/32) | in | inverted carburetor |
| Gap | Ignition module to magnet air gap | .012/.016 | in | |
| Gap | Spark plug gap | 0.025 | in | |
| Pressure | Crankcase vacuum | 5 to 10 | in. water | engine at 3200 to 3600 RPM |
| Resistance | 70 Watt lighting stator | 0.3/0.5 | ohms | |
| Resistance | Ignition module secondary | 7,900 to 20,000 | ohms | |
| Resistance | Starter solenoid coil | 5.2/6.3 | ohms | |
| Speed | ACR flyweight transition speed | 600 | RPM | cranking |
| Speed | Idle speed (typical) | 1200 (+/- 75) | RPM | |
| Speed | Maximum engine speed | 3600 | RPM | no load |
| Torque | Air cleaner element cover nut | 50 | in.lb | |
| Torque | Bearing plate screw | 115 | in.lb | |
| Torque | Bearing plate screw | 35 | ft.lb | |
| Torque | Cam gear cover screws | 115 | in.lb | |
| Torque | Carburetor bowl retaining screw | 50/60 | in.lb | |
| Torque | Carburetor fuel inlet seat | 35/45 | in.lb | |
| Torque | Connecting rod nut (new service rod) | 140 | in.lb | |
| Torque | Connecting rod nut (new service rod) | 260 | in.lb | |
| Torque | Connecting rod nut (used/reinstalled rod) | 100 | in.lb | |
| Torque | Connecting rod nut (used/reinstalled rod) | 200 | in.lb | |
| Torque | Cylinder head cap screw | 15/20 | ft.lb | |
| Torque | Cylinder head cap screw / hex spacer screw | 25/30 | ft.lb | |
| Torque | Electric starter stop nut | 160 | in.lb | |
| Torque | Fan fastener | 115 | in.lb | |
| Torque | Flywheel fastener | 40/45 | ft.lb | |
| Torque | Flywheel fastener | 85/90 | ft.lb | |
| Torque | Fuel pump mounting screw | 40/45 | in.lb | |
| Torque | Governor arm palnut | 15 | in.lb | |
| Torque | Governor bushing nut | 100/120 | in.lb | |
| Torque | Ignition module mounting screw | 32 | in.lb | |
| Torque | Keyswitch nut | 90/100 | in.lb | |
| Torque | Oil Sentry switch max | 90 | in.lb | |
| Torque | Retractable starter center screw | 55/70 | in.lb | |
| Torque | Retractable starter center screw | 65/75 | in.lb | |
| Torque | Spark plug | 18/22 | ft.lb | |
| Valve clearance | Exhaust valve to tappet | .017/.019 | in | cold |
| Valve clearance | Intake valve to tappet | .006/.008 | in | cold |
| Valve clearance | Intake valve to tappet | .008/.010 | in | cold |
| Voltage | Recommended battery | 12 | V | rating at least 32 amp.hr./250 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | SAE 30 (straight 30-weight) | API Service Class SF or SG | Do not use multi-viscosity oils above 32 F (0 C) | ||
| Fuel | Unleaded gasoline, pump octane 87 or higher (90 octane minimum Research method) | Gasohol up to 10% ethyl alcohol approved; MTBE blends up to 15% approved; other blends not approved | |||
| Other | Kohler electric starter drive lubricant | Part No. 52 357 01; required on all Kohler electric starter drives |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
7Adjust Carburetor adjustment
⚠ Explosive Fuel! Gasoline is extremely flammable.
- Stop engine. Turn main fuel and idle fuel needles in until lightly bottomed.
- Set preliminary settings by turning needles out per model.
- Run engine at half-throttle 5-10 minutes to warm up.
- Set main fuel needle midway between rich and lean at wide open throttle.
- Set idle fuel needle at idle position; set idle speed to 1200 RPM.
Check Valve-To-Tappet Clearance adjustment
Tools: Flat feeler gauge
- Remove air cleaner assembly, carburetor, and breather assembly.
- Position crankshaft so piston is at top of compression stroke.
- Measure valve-to-tappet clearance with a flat feeler gauge (engine cold).
- On M10-M16, adjust by turning the adjusting screw on tappets.
- On M8, grind valve stems if too small, or replace valves if too large.
Governor Initial Adjustment adjustment
⚠ Overspeed Is Hazardous! Maximum allowable speed is 3600 RPM, no load.
Tools: Pliers
- Make sure throttle linkage is connected to governor arm and carburetor throttle lever.
- Pull governor arm away from carburetor as far as it will go.
- Grasp end of cross shaft with pliers and turn counterclockwise as far as it will go.
- Tighten palnut on governor arm to 15 in. lb.
Setting Carburetor Float Level and Drop adjustment
Tools: Small screwdriver, .010 in feeler gauge
- Invert carburetor; float tab rests on fuel inlet needle. Set 11/64 in (+ 1/32) clearance; bend tab to adjust.
- Turn carburetor to normal position and let float drop; limit drop to 1-1/32 in; bend tab to adjust.
- Check float-to-float-hinge-tower clearance with .010 in feeler gauge; file towers if needed.
Change Oil maintenance
- Remove the oil drain plug and dipstick. Tilt engine slightly toward drain hole.
- Reinstall the drain plug and tighten securely.
- Fill with new oil of the proper type to the F mark on dipstick.
Storage Procedure maintenance
- Change oil while engine is still warm.
- Change reduction gear unit oil if equipped; run engine briefly to distribute oil.
- Drain fuel tank and fuel system (or run engine until empty).
- Remove spark plug; add one tablespoon engine oil; reinstall plug without lead; crank two or three revolutions.
- Turn engine until piston is at top of stroke; reinstall plug without lead.
- Clean exterior surfaces and coat exposed metal with a light film of oil.
- Store engine in a clean, dry place.
Remove and Install Ignition Module (air gap setting) repair
Tools: Flat feeler gauge or shim stock, Torque wrench
- Install module, plain washers, and hex cap sems screws; move module away from flywheel and tighten slightly.
- Insert .018 in flat feeler gauge between magnet and module.
- Loosen screws so magnet pulls module down; tighten screws to 32 in. lb.
- Remove feeler gauge; final air gap should be .012/.016 in.
- Rotate flywheel to confirm magnet does not strike module.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Repair guides
2Step-by-step procedures compiled from the Kohler service manual for this model.
Parts
8model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 41 757 02 | Starter pawl repair kit | Starter | buy | |
| 52 357 01 | Electric starter drive lubricant | 1 | Fluid | buy |
| RH-10 | Spark Plug (Champion or equiv.) | 1 | Spark plug | Amazon Amazon eBay eBay FridayParts $96.50 |
| 25 757 01 | Carburetor Repair Kit | 1 | Service part / kit | buy |
| 25 757 02 | Carburetor Repair Kit | 1 | Service part / kit | buy |
| 25 757 03 | Float Repair Kit | 1 | Service part / kit | buy |
| 25 757 04 | Throttle And Choke Shaft Replacement Kit | Service part / kit | buy | |
| 25 757 05 | Throttle And Choke Shaft Replacement Kit | Service part / kit | buy |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Engine spec — Kohler-Magnum-Single-Cylinder-Engine-Specifications-and-Tolerances (Kohler)Parts manual — Kohler Carburetor Reference Manual TP-2377-E (Kohler)Service manual — tp 2203 a (Kohler)
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.