Kohler ECV740 Troubleshooting
| Engine Model: Kohler Command Pro ECV740 EFI |
| Engine Type: 4-cycle V-Twin cylinder vertical shaft air-cooled gasoline |
| Total Displacement: 45.6 cu.in (747 cc) |
| Rated Engine Power: 25 Hp (18.6 kW) at 3600 rpm |
| Fuel System Type: Electronic fuel injection (EFI) |
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| Engine hard to start or doesn't start |
No fuel in fuel tank - Fill fuel up.
Low-quality gasoline - Change fuel.
Air in fuel system - Bleed fuel system.
Faulty spark plug wire connection - Inspect the spark plug wire connection, replace or repair.
Spark plug is faulty - Change spark plug.
Fuel filter is plugged - Change fuel filter.
Brake pedal not depressed - Press the brake pedal.
Damaged or loose Crankshaft position sensor - Crankshaft position sensor needs to be replaced.
Incorrectly adjusted or faulty throttle position sensor - Adjust or change throttle position sensor.
System voltage is low - Voltage regulator is faulty, replace it.
Fuel injectors are faulty or clogged - Clean or install new fuel injectors.
Dirt in the fuel lines - Clean fuel system lines.
Low compression - Check and replace worn parts.
Unadjusted or worn throttle cable - Replace cable or adjust properly.
| Engine runs intermittently |
Air intake screen is plugged - Clean and wash as required.
Ignition failure - Test ignition and replace failed parts.
Stuck or faulty throttle cable - Service or replace the cable.
Air filter element is plugged - Change or clean air filter.
Fuel pump is faulty or clogged - Test fuel pump and change if necessary.
Fuel injectors are faulty or clogged - Check fuel injectors and replace if necessary.
Fuel lines are clogged - Clean fuel lines.
Incorrectly adjusted or faulty throttle position sensor - Set throttle position sensor or change it.
| Engine starts and then shuts off |
Spark plug is faulty - Replace spark plug.
Ignition coil is defective - Install a new ignition coil.
Valve springs are weak or broken - New valve springs need to be installed.
Valves are stuck - Valves need to be cleaned.
Plugged fuel filter - Fuel filter needs to be replaced.
Plugged air filter - Clean or replace air filter.
Fuel lines clogging - Clean fuel lines.
Dirty or damaged fuel injectors - Clean or replace fuel injectors.
Governor setting is improper - Set governor correctly.
Engine oil level is low - Fill the crankcase with engine oil.
Excessive engine load - Load reducing is recommended.
Cooling fins are plugged - Wash or clean as required.
Improper ignition timing - Ignition timing needs to be set properly.
Incorrect valve setting - Set the valves properly.
Stale gasoline - Use proper fuel.
Engine is overloaded - Reduce the load.
Not enough engine oil - Add oil to the engine crankcase.
Low idle speed setting is incorrect - Adjustment required.
Fuel pump is dirty or defective - Clean or replace fuel pump.
Main bearings or crankshaft are worn out - Worn parts replacement required.
Valve clearance is not correct - Adjustment procedure required.
Cylinder bore or piston rings are damaged - Change defective parts.
Air filter is dirty - Clean or change air filter.
Dirty or damaged fuel pump - Test fuel pump and change if necessary.
Fuel lines are clogged - Service fuel lines.
Wrong governor adjustment - Set governor properly.
One fuel injector is damaged - Change fuel injector.
Ignition system is defective - Test ignition and replace failed parts.
Blown cylinder head gasket - Replace cylinder head gasket.
Burned or stuck valves - Replace or service valves.
Damaged or worn push rod - Replace push rod.
Cylinder block parts are damaged - Defective parts need to be replaced.
Plugged oil filter - Clean or change oil filter.
Choke doesn't open well - Adjust or replace choke cable.
Fuel injectors are damaged or dirty - Clean or replace fuel injectors.
Spark plug is loose or defective - Tighten or replace spark plug.
Burned, worn, or stuck valves - Service or replace valves.
Sleeve, rings, or piston are damaged - Change faulty parts.
Incorrect valve clearance - Adjust valve clearance.
| Excessive engine oil consumption |
Defective seals or gaskets - To repair leaks, replace worn parts.
Damaged valve stems or valve guides - Valves must be replaced.
Piston rings are stuck or broken - Install new piston rings.
Piston or cylinder liner is scored - Inspect liner and piston, fit new parts as necessary.
Breather hose or pipe is plugged - Service or replace.
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