Kohler CH26S EFI Troubleshooting
| Engine Model: Kohler Command Pro CH26S EFI |
| Engine Type: 4-cycle V-Twin cylinder horizontal shaft air-cooled gasoline |
| Total Displacement: 44 cu.in (725 cc) |
| Rated Engine Power: 26 Hp (19.4 kW) at 3600 rpm |
| Fuel System Type: Electronic fuel injection (EFI) |
____________________________________________________________________________________
| Engine starts hard or doesn't start |
No fuel in fuel tank - Fill fuel up.
Improper fuel grade - Change fuel.
Air in fuel system - Bleed fuel system.
Faulty spark plug wire connection - Inspect spark plug wiring connection, change or repair.
Spark plug is damaged - Change spark plug as required.
Fuel filter is dirty - Install new filter.
Brake pedal not pushed down - Push the brake pedal down.
Damaged or loose Crankshaft position sensor - Replace crankshaft position sensor.
Throttle position sensor faulty or incorrectly set - Adjust or change throttle position sensor.
Lack of system voltage - Voltage regulator is faulty, replace it.
Dirty or defective fuel injectors - Clean or replace fuel injectors.
Fuel lines are dirty - Service fuel lines.
Poor compression - Inspect and replace wear parts.
Throttle cable is adjusted improperly or worn - Adjust properly or change the cable.
Plugged cooling fins - Need to wash or clean.
Ignition failure - Check ignition system and replace faulty parts.
Throttle cable is faulty or stuck - Clean or change the cable.
Clogged air filter - Clean or change air filter.
Dirty or faulty fuel pump - Test fuel pump and change if necessary.
Clogged or damaged fuel injectors - Service or change fuel injectors.
Fuel lines are clogged - Service fuel lines.
Throttle position sensor defective or incorrectly set - Adjust throttle position sensor or replace it.
Spark plug is defective - Spark plug need to be replaced.
Ignition coil is defective - Ignition coil must be replaced.
Valve springs are bad or broken - Valve springs need to be changed.
Valves sticking - Valves need to be cleaned.
Fuel filter is plugged - Fuel filter needs to be replaced.
Clogged air filter - Replace or clean air filter.
Dirty fuel lines - Service fuel lines.
Fuel injectors are dirty or defective - Clean or replace fuel injectors.
Wrong governor setting - Adjust governor as required.
Engine oil level is low - Fill up the engine oil.
Engine is running overloaded - Reduce engine load.
Air intake grill is clogged - Need to clean or wash.
Ignition timing is improper - Set the ignition timing properly.
Valve setting is wrong - Valves needs to be set correctly.
| Abnormal engine knocking or noise |
Stale fuel - Use correct gasoline.
Engine overloaded - Load reducing required.
Low engine oil level - Check and refill engine oil.
Low idle speed adjustment is incorrect - Correct the settings.
Clogged or damaged fuel pump - Clean or install new fuel pump.
Crankshaft or main bearings failure - Change or repair worn components.
Valve clearance is wrong - Need to adjust valve clearance.
Damaged cylinder bore or piston rings - Change faulty components.
| Engine power is insufficient |
Air filter is dirty - Clean or change air filter.
Fuel pump is faulty or clogged - Service or change fuel pump.
Fuel lines clogging - Fuel lines must be clean.
Governor adjustment is improper - Set governor properly.
One fuel injector is damaged - Test fuel injector and replace if necessary.
Ignition system malfunction - Inspect ignition system and change failed components.
Cylinder head gasket is worn - Replace the head gasket.
Valves are stuck or burned - Change or service valves.
Push rod is worn or bent - Replace push rod.
Worn cylinder block components - Replace defective parts.
Oil filter element is clogged - Clean or change oil filter.
| Engine using too much gasoline |
Throttle not fully open - Check throttle cable and adjust as required.
Fuel injectors are defective or dirty - Test fuel injectors and replace if necessary.
Defective or loose spark plug - Spark plug need to be replaced or tightened.
Valves are stuck, burned, or worn - Clean or replace valves.
Worn sleeve, piston, or rings - Replace defective parts.
Excessive valve clearance - Need to adjust valve clearance.
| Engine using too much oil |
Gaskets or seals are excessively worn - Change worn parts according to specifications.
Worn valve stems and valve guides - Valves replacement required.
Piston rings are stuck or worn - Change the piston rings as required.
Scored piston or cylinder liner - Check liner and piston, change as required.
Clogged breather hose or pipe - Change or service.
____________________________________________________________________________________
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
| Industrial Engines Technical Specifications |
