Kohler CV14S Troubleshooting
| Engine Model: Kohler Command CV14S |
| Engine Type: 4-cycle single-cylinder vertical shaft air-cooled gasoline |
| Total Displacement: 24.3 cu.in (398 cc) |
| Rated Engine Power: 14 Hp (10.5 kW) at 3600 rpm |
| Carburetor Type: Float with fixed main jet |
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| Engine is not starting or hard starting |
Empty fuel tank - Add gasoline.
Incorrect fuel grade - Use quality gasoline.
Air in the fuel lines - Bleed the fuel lines.
Disconnected or loose spark plug wire - Check spark plug wiring connection, repair or change.
Damaged spark plug - Spark plug need to be replaced.
Clogged fuel filter - Change fuel filter.
Safety contact for brake pedal defective - Install new part.
Carburetor problems - Carburetor diagnostics required.
Engine has low compression - Check cylinder block and replace defective parts.
Not adjusted or damaged throttle cable - Adjust correctly or change the cable.
Air intake screen is blocked - Need to wash or clean.
Defective ignition system - Test ignition and replace failed parts.
Stuck or defective choke cable - Change or clean the cable.
Dirty air filter element - Change or service air filter.
Clogged or defective fuel pump - Service or replace fuel pump.
| Engine starts and then shuts off |
Damaged spark plug - Install new spark plug.
Defective or clogged carburetor - Clean or change carburetor.
Ignition coil is defective - Replace ignition coil as necessary.
Valve springs are loose or broken - Change valve springs.
Stuck valves - Valves must be cleaned.
Lack of engine oil - Fill up the oil to required level.
Engine is running overloaded - Reduce load.
Plugged cooling fins - Wash or clean as required.
Carburetor fuel mixture is too lean - Adjust carburetor correctly.
Incorrect ignition timing - Ignition timing needs to be set properly.
Valve setting is wrong - Set the valves properly.
| Abnormal engine knocking or noise |
Stale or low octane fuel - Change gasoline.
Engine is running overloaded - Reduce load.
Not enough engine oil - Check and refill engine oil.
Incorrectly adjusted low idle speed - Correct idle adjustment.
Fuel pump is defective or dirty - Check fuel pump and change if required.
Worn crankshaft or main bearings - Worn parts replacement required.
Excessive valve clearance - Adjustment procedure required.
Cylinder bore or piston rings are worn - Replace defective parts.
Incorrectly adjusted or clogged carburetor - Service or correctly adjust carburetor.
Air filter element is clogged - Service or change air filter.
Dirty or defective fuel pump - Clean or install new fuel pump.
Ignition system failure - Check ignition system and replace faulty parts.
Worn cylinder head gasket - Install new cylinder head gasket.
Burned or stuck valves - Replace or clean valves.
Worn or bent push rod - Replace push rod.
Damaged cylinder block components - Defective components need to be replaced.
Oil filter is blocked (if equipped) - Change or service oil filter.
Throttle did not open fully - Replace or adjust throttle cable.
Incorrect adjustment of carburetor main jet - Adjust the carburetor main jet properly.
Loose or faulty spark plug - Re-tighten or change the spark plug.
Valves are worn, burned or stuck - Replace or clean valves.
Worn sleeve, piston, or rings - Replace faulty components as required.
Valve clearance is wrong - Check and adjust.
Defective seals or gaskets - Defective components must be replaced.
Valve guides and stems are worn - Valves must be replaced.
Piston rings are defective or worn - Change the piston rings as required.
Damaged cylinder liner or piston - Check piston and liner, install new parts as required.
Breather pipe or hose is plugged - Replace or clean.
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