Kohler ECV980 Troubleshooting
| Engine Model: Kohler Command Pro ECV980 EFI |
| Engine Type: 4-cycle V-Twin cylinder vertical shaft air-cooled gasoline |
| Total Displacement: 61.1 cu.in (999 cc) |
| Rated Engine Power: 38 Hp (28.3 kW) at 3600 rpm |
| Fuel System Type: Electronic fuel injection (EFI) |
____________________________________________________________________________________
| Engine is not starting or hard starting |
No fuel in fuel tank - Add fuel.
Incorrect fuel grade - Change gasoline.
There is air in the fuel system - Bleed the system.
Damaged spark plug wiring connection - Check the spark plug wire connection, repair or replace.
Damaged spark plug - Spark plug need to be replaced.
Fuel filter is plugged - Change fuel filter.
Faulty safety switch - Change damaged switch.
Damaged or loose Crankshaft position sensor - Install new crankshaft position sensor.
Faulty or incorrectly adjusted throttle position sensor - Set throttle position sensor or change it.
Lack of system voltage - Check voltage regulator and replace if required.
Dirty or faulty fuel injectors - Service or change fuel injectors.
Dirty fuel lines - Clean fuel lines.
Low cylinder compression - Check cylinder block and replace worn parts.
Choke cable is not adjusted properly or worn - Change cable or adjust properly.
Air intake screen is plugged - Clean and wash as required.
Ignition failure - Inspect ignition system and change failed components.
Stuck or faulty throttle cable - Service or replace the cable.
Plugged air filter - Replace or service air filter.
Fuel pump is dirty or defective - Clean or replace fuel pump.
Fuel injectors are damaged or dirty - Test fuel injectors and replace if necessary.
Fuel lines are dirty - Fuel lines need to be cleaned.
Throttle position sensor faulty or incorrectly set - Adjust or change throttle position sensor.
| Engine starts and stalls suddenly |
Spark plug is defective - Replace spark plug.
Ignition coil is faulty - Replace ignition coil as necessary.
Valve springs are weak or broken - Replace valve springs.
Valves sticking - Valves need to be cleaned.
Clogged fuel filter - Fuel filter needs changing.
Air filter is blocked - Clean or replace air filter.
Fuel lines are dirty - Fuel lines must be clean.
Clogged or damaged fuel injectors - Service or replace fuel injectors.
Incorrect governor setting - Adjust governor correctly.
Low engine oil level - Check and refill engine oil.
Engine is overloaded - Reduce load.
Plugged cooling fins - Clean and wash as required.
Improper ignition timing - Ignition timing needs to be set properly.
Wrong valve setting - Valves needs to be set correctly.
| Abnormal engine noise or knocking |
Low octane gasoline - Change gasoline.
Engine is overloaded - Reduce load.
Low engine oil level - Fill up the oil to required level.
Too low idle RPM - Test and adjust.
Fuel pump is defective or dirty - Service or change fuel pump.
Crankshaft or main bearings failure - Have bearings or crankshaft replaced.
Excessive valve clearance - Need to adjust valve clearance.
Worn cylinder bore or piston rings - Replace defective parts.
| Engine power is insufficient |
Dirty air filter element - Clean or replace air filter.
Fuel pump is damaged or dirty - Clean or replace fuel pump.
Fuel lines are dirty - Fuel lines need to be cleaned.
Incorrect governor adjustment - Set governor correctly.
One fuel injector is defective - Install new fuel injector.
Ignition system is defective - Inspect ignition system and change failed components.
Cylinder head gasket is defective - Replace cylinder head gasket.
Valves are stuck or burned - Replace or clean valves.
Push rod is worn or damaged - Install a new push rod.
Faulty cylinder block components - Replace defective parts.
Clogged oil filter - Replace or service oil filter.
| Engine uses too much fuel |
Throttle does not open well - Inspect throttle cable and adjust it.
Fuel injectors are clogged or faulty - Check fuel injectors and replace if necessary.
Spark plug is loose or faulty - Tighten or replace spark plug.
Stuck, worn, or burned valves - Service or change valves.
Worn rings, piston, or sleeve - Change defective components.
Improper valve clearance - Check and adjust.
| Engine consuming too much oil |
Damaged seals or gaskets - Change worn parts according to specifications.
Worn valve stems and valve guides - Valves need to be changed.
Piston rings are seized or worn - Piston rings replacement required.
Damaged cylinder liner or piston - Check piston and liner, install new parts as required.
Plugged breather hose or pipe - Clean or change.
____________________________________________________________________________________
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
| Industrial Engines Technical Specifications |
