Kohler CV745 EFI Troubleshooting
| Engine Model: Kohler Command Pro CV745 EFI |
| Engine Type: 4-cycle 2-cylinder OHV vertical shaft air-cooled gasoline |
| Total Displacement: 44 cu.in (725 cc) |
| Rated Engine Power: 28 Hp (20.9 kW) at 3600 rpm |
| Fuel System Type: Electronic fuel injection (EFI) |
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| Engine doesn't start or starts hard |
Fuel tank is empty - Fill gasoline up.
Wrong grade of gasoline - Use correct fuel grade.
Air or water in fuel system - Remove water or air from fuel system.
Defective spark plug wire connection - Inspect spark plug wiring connection, change or repair.
Spark plug is faulty - Replace spark plug.
Fuel filter is plugged - Change fuel filter.
Defective safety switch - Replace if required.
Crankshaft position sensor is loose or defective - Crankshaft position sensor must be replaced.
Improper setting or defective throttle position sensor - Adjust throttle position sensor or replace it.
Lack of system voltage - Check voltage regulator and change as required.
Fuel injectors are dirty or defective - Service or change fuel injectors.
Fuel lines are clogged - Fuel lines need to be cleaned.
Bad engine compression - Inspect cylinder block and replace worn components.
Throttle cable is damaged or adjusted incorrectly - Adjust correctly or change the cable.
Air intake screen is blocked - Need to wash or clean.
Ignition system is defective - Test ignition and replace failed parts.
Stuck or defective choke cable - Replace or clean the cable.
Air filter is blocked - Service or change air filter.
Clogged or damaged fuel pump - Clean or change fuel pump.
Dirty or damaged fuel injectors - Clean or replace fuel injectors.
Fuel lines clogging - Fuel lines must be clean.
Incorrectly adjusted or faulty throttle position sensor - Throttle position sensor must be adjusted or replaced.
| Engine starts but stops suddenly |
Spark plug is faulty - Change spark plug.
Ignition coil is faulty - Change ignition coil as required.
Weak or damaged valve springs - New valve springs need to be installed.
Valves are stuck - Clean the valves.
Plugged fuel filter - Install new filter.
Plugged air filter - Change or clean air filter.
Fuel lines are dirty - Clean fuel lines.
Dirty or faulty fuel injectors - Inspect fuel injectors and change as required.
Improper governor setting - Set governor properly.
Engine oil level low - Fill up the oil to required level.
Excessive engine load - Reduce load.
Cooling fins are clogged - Need to clean or wash.
Ignition timing is incorrect - Ignition timing needs to be adjusted correctly.
Incorrect valve setting - Set the valves correctly.
| Engine knocking sound or abnormal noise |
Low octane gasoline - Change fuel.
Engine overload - Reduce load.
Engine oil level is low - Fill up the engine oil.
Incorrect low idle setting - Test and adjust.
Fuel pump is faulty or clogged - Check fuel pump and replace if necessary.
Main bearings or crankshaft wear - Replace crankshaft or bearings.
Improper valve clearance - Adjust valve clearance.
Cylinder bore or piston rings are worn - Change defective parts.
Dirty air filter element - Replace or service air filter.
Clogged or damaged fuel pump - Clean or install new fuel pump.
Dirt in the fuel lines Service fuel lines.
Governor adjustment is incorrect - Governor needs to be adjusted correctly.
Faulty one fuel injector - Check fuel injector and replace if necessary.
Ignition system is defective - Check ignition and replace faulty components.
Blown cylinder head gasket - Install new head gasket.
Valves are burned or stuck - Service or change valves.
Push rod is worn or damaged - Push rod should be replaced.
Cylinder block components are faulty - Replace defective components as required.
Oil filter element is plugged - Change or clean oil filter.
| Engine uses too much fuel |
Choke did not open fully - Change or adjust choke cable.
Fuel injectors are clogged or faulty - Clean or install new fuel injectors.
Spark plug is loose or faulty - Change or re-tighten spark plug.
Stuck, worn, or burned valves - Replace or clean valves.
Piston, sleeve, or rings are damaged - Replace faulty components.
Incorrect valve clearance - Check and adjust.
| High engine oil consumption |
Seals or gaskets are defective - Replace defective parts.
Valve stems and guides are worn - Valves need to be changed.
Piston rings are stuck or broken - Install new piston rings.
Cylinder liner or piston is damaged - Inspect piston and liner, fit new components as necessary.
Breather pipe or hose is blocked - Clean or replace.
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