Kohler ECH730 Troubleshooting
| Engine Model: Kohler Command Pro ECH730 EFI |
| Engine Type: 4-cycle V-Twin cylinder horizontal shaft air-cooled gasoline |
| Total Displacement: 45.6 cu.in (747 cc) |
| Rated Engine Power: 23 Hp (17.2 kW) at 3600 rpm |
| Fuel System Type: Electronic fuel injection (EFI) |
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| Engine won't start or starts hard |
Empty gas tank - Add fuel.
Incorrect fuel grade - Change gasoline.
Air in the fuel lines - Bleed the fuel lines.
Disconnected or loose spark plug wire - Inspect spark plug wiring connection, change or repair.
Defective spark plug - Change spark plug as required.
Dirty fuel filter - Fuel filter needs to be replaced.
Defective safety switch - Replace if required.
Broken or loose crankshaft position sensor - Change crankshaft position sensor.
Incorrectly adjusted or faulty throttle position sensor - Replace or adjust throttle position sensor.
System voltage is low - Faulty voltage regulator, replace it.
Fuel injectors are faulty or clogged - Clean or change fuel injectors.
Restricted fuel lines - Clean fuel system lines.
Low compression - Check and replace worn parts.
Damaged or incorrectly adjusted choke cable - Adjust correctly or change the cable.
Cooling fins are plugged - Clean and wash as required.
Ignition system malfunction - Check ignition and replace faulty components.
Throttle cable is stuck or defective - Change or service the cable.
Plugged air filter - Clean or change air filter.
Fuel pump is faulty or clogged - Test fuel pump and replace if necessary.
Dirty or defective fuel injectors - Check fuel injectors and change if required.
Dirt in the fuel lines - Service fuel lines.
Throttle position sensor malfunction or improper setting - Set throttle position sensor or change it.
| Engine starts and then stalls |
Spark plug is damaged - Change spark plug.
Ignition coil is not working - Replace ignition coil as necessary.
Valve springs are worn or loose - Install new valve springs.
Valves are stuck - Service the valves.
Fuel filter is clogged - Fuel filter needs changing.
Dirty air filter element - Service or replace air filter.
Restricted fuel lines - Service fuel lines.
Clogged or defective fuel injectors - Check fuel injectors and change if required.
Improper governor setting - Governor needs to be adjusted correctly.
Engine oil level is low - Fill the crankcase with engine oil.
Engine overloaded - Reduce load.
Cooling fins are plugged - Need to clean or wash.
Ignition timing is incorrect - Set the ignition timing properly.
Valve setting is wrong - Adjust valves correctly.
| Abnormal engine noise or knocking |
Low octane fuel - Change gasoline.
Engine is running overloaded - Reduce the load.
Low engine oil level - Fill up the engine oil.
Low idle speed setting is not correct - Correct idle settings.
Clogged or defective fuel pump - Service or replace fuel pump.
Main bearings or crankshaft failure - Need to install new components.
Valve clearance is improper - Adjust valve clearance according to specifications.
Worn cylinder bore or piston rings - Replace defective components.
Plugged air filter - Service or change air filter.
Clogged or defective fuel pump - Clean or replace fuel pump.
Dirty fuel lines - Fuel lines need to be cleaned.
Wrong governor adjustment - Governor needs to be set properly.
One fuel injector is damaged - Test fuel injector and change if necessary.
Ignition system failure - Inspect ignition system and change failed components.
Cylinder head gasket is defective - Change cylinder head gasket.
Valves are stuck or burned - Service or replace valves.
Damaged or worn push rod - Replace push rod.
Cylinder block components are worn - Change defective components.
Oil filter element is plugged - Change or clean oil filter.
| Excessive fuel consumption |
Choke didn't open fully - Adjust or change choke cable.
Fuel injectors are damaged or dirty - Service or change fuel injectors.
Spark plug is faulty or loose - Re-tighten or replace spark plug.
Stuck, worn, or burned valves - Clean or change valves.
Sleeve, piston, or rings are damaged - Replace faulty components as required.
Incorrect valve clearance - Check and adjust.
| Excessive engine oil consumption |
Worn gaskets or seals - Worn parts need to be replaced.
Valve stems or guides are damaged - Valves need to be changed.
Piston rings are seized or worn - Have piston rings replaced.
Scuffed piston or cylinder liner - Check piston and liner, replace as required.
Breather pipe or hose is clogged - Service or change.
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