________________________________________________________________________________________
| Home / Engines / Kohler Engines / Kohler CH20S |
Kohler Command CH20S Problems
| Engine Model: Kohler Command CH20S |
| Engine Type: 4-cycle V-twin cylinder horizontal shaft gasoline engine |
| Total Displacement: 39.1 cu.in (624 cc) |
| Rated Engine Power: 20.5 Hp (15.3 kW) at 3600 rpm |
| Fuel System: One-barrel carburetor with fixed main jet |
| Engine will not start or difficult to start |
Gas tank is empty - Fill it up.
Improper fuel grade - Use correct gasoline grade.
Fuel system clogged - Repair or replace.
Spark plug wire is disconnected or loose - Check the spark plug wire connection, repair or replace.
Spark plug is defective - Install new spark plug.
Clogged fuel filter - Fuel filter needs changing.
Faulty safety switch - Change damaged switch.
Carburetor components worn out - Repair or replace parts.
Poor compression - Inspect and replace wear parts.
Damaged or not adjusted choke cable - Adjust correctly or change the cable.
| Engine runs unevenly |
Plugged cooling fins - Need to clean or wash.
Ignition system failure - Inspect ignition system and change failed components.
Throttle cable is stuck or defective - Replace or clean the cable.
Plugged air filter - Change or service air filter.
Dirty or faulty fuel pump - Check fuel pump and change if required.
| Engine starts but immediately stops |
Faulty spark plug - Spark plug need to be replaced.
Dirty or faulty carburetor - Repair or clean carburetor.
Defective ignition coil - Replace ignition coil as necessary.
Damaged or weak valve springs - Change valve springs.
Valves are stuck - Clean the valves.
| Engine overheats |
Insufficient engine oil - Check and refill engine oil.
Engine overloaded - Reduce engine load.
Cooling fins are blocked - Need to clean or wash.
Carburetor mixture is too lean - Set the carburetor properly.
Incorrect ignition timing - Set the ignition timing correctly.
Wrong valve setting - Adjust valves correctly.
| Abnormal engine noise or knocking |
Stale gasoline - Use correct fuel.
Engine is running overloaded - Reduce the load.
Low engine oil level - Add oil to the engine crankcase.
Wrong adjustment of low idle speed - Adjustment required.
Fuel pump is damaged or dirty - Check fuel pump and replace if necessary.
Worn main bearings or crankshaft - Worn parts replacement required.
Improper valve clearance - Check and adjust.
Cylinder bore or piston rings are worn - Replace faulty components.
| Engine power is too low |
Improperly or clogged carburetor - Adjust the carburetor properly or clean it.
Dirty air filter element - Replace or clean air filter.
Clogged or defective fuel pump - Clean or change fuel pump.
Ignition system failure - Inspect ignition system and change failed components.
Cylinder head gasket is blown - Cylinder-head gasket replacement required.
Burned or stuck valves - Service or change valves.
Push rod is worn or damaged - Change push rod.
Cylinder block components are faulty - Replace defective components.
Plugged oil filter (if equipped) - Replace or clean oil filter.
| Engine using too much gasoline |
Insufficient choke opening - Inspect choke cable and adjust as required.
Carburetor main jet adjustment is improper - Adjust the carburetor main jet properly.
Spark plug is defective or loose - Re-tighten or replace spark plug.
Valves are worn, stuck, or burned - Service or replace valves.
Worn sleeve, piston, or rings - Change faulty components.
Excessive valve clearance - Adjust to proper valve clearance.
| Excessive oil consumption |
Worn seals or gaskets - Replace defective parts.
Valve stems or guides are damaged - Need to replace the valves.
Piston rings are defective or worn - Replace piston rings.
Cylinder liner or piston is damaged - Check piston and liner, change as required.
Clogged breather pipe or hose - Replace or clean.
________________________________________________________________________________________
________________________________________________________________________________________
| Engines Technical Specifications |