Kohler CH23S Troubleshooting
| Engine Model: Kohler Command CH23S |
| Engine Type: 4-cycle V-Twin cylinder horizontal shaft air-cooled gasoline |
| Total Displacement: 41.1 cu.in (674 cc) |
| Rated Engine Power: 22.5 Hp (16.8 kW) at 3600 rpm |
| Carburetor Type: One-barrel with fixed main jet |
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| Engine hard to start or won't start |
No fuel in fuel tank - Fill fuel up.
Wrong grade of gasoline - Use quality fuel.
Dirty fuel lines - Inspect and clean.
Defective wiring connection of spark plug - Check spark plug wiring connection, repair or change.
Spark plug is damaged - Install new spark plug.
Fuel filter is clogged - Install new filter.
Brake pedal not pushed down - Push the brake pedal down.
Carburetor components worn out - Repair or replace parts.
Poor cylinder compression - Check cylinder block and change worn parts.
Worn or improperly adjusted choke cable - Adjust correctly or replace the cable.
Clogged cooling fins - Wash or clean as required.
Defective ignition - Inspect ignition system and change faulty parts.
Stuck or faulty throttle cable - Replace or clean the cable.
Plugged air filter - Service or replace air filter.
Fuel pump is dirty or defective - Inspect fuel pump and change as required.
| Engine starts but stops suddenly |
Spark plug is damaged - Change spark plug as required.
Clogged or defective carburetor - Clean or install new carburetor.
Ignition coil is damaged - Install a new ignition coil.
Loose or worn valve springs - New valve springs need to be installed.
Valves sticking - Valves must be cleaned.
Engine oil level is insufficient - Check oil level and add oil as required.
Engine is under excessive load - Reduce the load.
Cooling fins are plugged - Need to wash or clean.
Too lean fuel mixture in carburetor - Make the correct settings.
Ignition timing is wrong - Ignition timing needs to be set properly.
Valve setting is improper - Set the valves correctly.
Low octane gasoline - Change fuel.
Engine overload - Reduce engine load.
Engine oil level is insufficient - Check and refill engine oil.
Incorrectly adjusted low idle speed - Need to adjust idle speed.
Fuel pump is clogged or faulty - Test fuel pump and change if necessary.
Crankshaft or main bearings failure - Crankshaft or bearings need to be replaced.
Incorrect valve clearance - Adjust valve clearance according to specifications.
Worn piston rings or cylinder bore - Replace faulty components.
Dirty or improperly adjusted carburetor - Clean or properly adjust carburetor.
Air filter is dirty - Change or clean air filter.
Fuel pump is dirty or defective - Service or change fuel pump.
Ignition system is defective - Check ignition and replace faulty components.
Cylinder head gasket is blown - Replace the gasket as required.
Stuck or burned valves - Clean or replace valves.
Bent or worn push rod - Push rod should be replaced.
Cylinder block parts are faulty - Defective components need to be replaced.
Dirty oil filter element (if equipped) - Clean or replace oil filter.
Insufficient throttle opening - Adjust or replace throttle cable.
Incorrect adjustment of carburetor main jet - Adjust the carburetor main jet correctly.
Spark plug is faulty or loose - Replace or tighten spark plug.
Burned, worn, or stuck valves - Clean or change valves.
Worn piston, rings, or sleeve - Change faulty parts.
Valve clearance is incorrect - Check and adjust.
| High engine oil consumption |
Damaged seals or gaskets - Replace to repair leaks.
Valve stems and guides are worn - Valves need to be changed.
Worn or broken piston rings - Install new piston rings.
Cylinder liner or piston is scored - Inspect liner and piston, fit new parts as necessary.
Clogged breather pipe or hose - Replace or service.
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