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| Home / Engines / Kohler Engines / Kohler CH11S |
Kohler Command CH11S Problems
| Engine Model: Kohler Command CH11S |
| Engine Type: 4-cycle 1-cylinder horizontal shaft air-cooled gasoline engine |
| Total Displacement: 24.3 cu.in (398 cc) |
| Rated Engine Power: 11 Hp (8.2 kW) at 3600 rpm |
| Fuel System: Carburetor with adjustable main jet or fixed jet |
| Engine hard to start or doesn't start |
Gas tank is empty - Fill fuel up.
Low-quality gasoline - Use quality gasoline.
Dirt and debris in fuel system - Remove debris and dirt.
Loose or disconnected spark plug wire - Check the spark plug wire connection, repair or replace.
Spark plug is damaged - Replace spark plug.
Fuel filter is plugged - Install new filter.
Defective safety switch - Replace if required.
Carburetor settings incorrect - Adjusting as required.
Weak cylinder compression - Inspect cylinder block and change worn parts.
Choke cable is unadjusted or damaged - Replace cable or adjust correctly.
| Unstable engine running |
Cooling fins are blocked - Need to clean or wash.
Ignition system failure - Test ignition and replace failed parts.
Throttle cable is stuck or defective - Change or clean the cable.
Plugged air filter - Replace or service air filter.
Clogged or damaged fuel pump - Check fuel pump and change if required.
| Engine stalls after starting |
Spark plug is damaged - Spark plug need to be replaced.
Carburetor is clogged or faulty - Service or repair carburetor.
Faulty ignition coil - Replace ignition coil as necessary.
Loose or worn valve springs - Install new valve springs.
Stuck valves - Valves must be cleaned.
| Engine overheating |
Lack of engine oil - Fill up the engine oil.
Engine is overloaded - Reduce the load.
Clogged cooling fins - Need to wash or clean.
Too lean fuel mixture in carburetor - Use proper settings.
Bad ignition timing - Ignition timing needs to be set properly.
Valve setting is incorrect - Adjust valves correctly.
| Engine noises or knocks |
Stale gasoline - Use proper gasoline.
Engine is running overloaded - Reduce load.
Not enough engine oil - Fill up the engine oil.
Too low idle RPM - Correct idle adjustment.
Clogged or damaged fuel pump - Inspect fuel pump and change as required.
Worn main bearings or crankshaft - Need to install new components.
Excessive valve clearance - Adjust valve clearance according to specifications.
Damaged cylinder bore or piston rings - Replace defective components.
| Lack of engine power |
Clogged or incorrectly adjusted carburetor - Service or correctly adjust carburetor.
Plugged air filter - Change or clean air filter.
Fuel pump is faulty or clogged - Clean or install new fuel pump.
Ignition system is defective - Test ignition and replace failed parts.
Cylinder head gasket is damaged - Replace the gasket as required.
Valves are stuck or burned - Replace or service valves.
Damaged or worn push rod - Install a new push rod.
Cylinder block parts are worn out - Defective components need to be replaced.
Plugged oil filter (if equipped) - Replace or service oil filter.
| High fuel consumption |
Throttle is not fully open - Change or adjust throttle cable.
Carburetor main jet is improperly adjusted - Adjust main jet as required.
Faulty or loose spark plug - Change or re-tighten spark plug.
Burned, worn, or stuck valves - Service or replace valves.
Rings, sleeve, or piston are damaged - Replace defective parts.
Incorrect valve clearance - Need to adjust valve clearance.
| Engine oil consumption is too high |
Gaskets or seals are excessively worn - Replace to repair leaks.
Worn valve stems and valve guides - Valves must be replaced.
Piston rings are stuck or broken - Have piston rings replaced.
Piston or cylinder liner is worn - Inspect liner and piston, change as necessary.
Breather pipe or hose is plugged - Clean or change.
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