Kohler 4EOZ Service page 51

Problem
Loses power (continued)
Overheats
Engine emits black or gray
exhaust smoke.
Low lube oil pressure
High lube oil consumption
TP-6137 5/03
Possible Cause
Carbon build up.
Improper cooling.
Fuel line restricted.
Engine overloaded.
Dirty fuel filter.
Improper valve clearance.
Dirty or faulty injectors.
Incorrect fuel injection timing.
Improper engine compression.
Vent in fuel tank obstructed.
Improper cooling.
Inoperative thermostat.
Air intake clogged.
Engine overloaded.
Cooling system need flushing.
Inoperative temperature switches.
Cooling water leaks from the water
passage.
Incorrect fuel type.
Clogged or dirty air intake screen.
Inoperative injection pump.
Faulty injectors.
Incorrect fuel injection timing.
Incorrect valve clearance.
Lube oil level too high.
Incorrect lube oil.
Low lube oil level.
Incorrect lube oil viscosity.
Inoperative lube oil pump.
Inoperative oil pressure switch.
Too light viscosity oil.
Oil leaks.
Incorrect oil type.
Clogged breather system.
Inoperative piston ring, piston, cylinder
block, valve guide, and seat.
Corrective Action
Clean the carbon from the cylinder head.
Inspect the cooling system.
Check the fuel lines.
Reduce the load.
Service the fuel filter.
Contact your local Kohler generator set
distributor for service.
Contact your local Kohler generator set
distributor for service.
Contact your local Kohler generator set
distributor for service.
Contact your local Kohler generator set
distributor for service.
Clean the cap in solvent; blow dry.
Check the intake and outlet openings.
Check the raw water strainer.
Replace the thermostat.
Service the air intake screen.
Reduce the load.
Flush the cooling system.
Replace shutdown switches.
Check the water passage.
Use correct fuel.
Service the air intake screen.
Contact your local Kohler generator set
distributor for service.
Contact your local Kohler generator set
distributor for service.
Contact your local Kohler generator set
distributor for service.
Contact your local Kohler generator set
distributor for service.
Drain out surplus.
Use correct viscosity oil.
Add lube oil.
Drain; fill with correct lube oil.
Contact your local Kohler generator set
distributor for service.
Replace the shutdown switch.
Use correct viscosity lube oil.
Check for leaks in lines, around gasket,
and drain plug.
Use correct viscosity lube oil.
Clean the breather system.
Contact your local Kohler generator set
distributor for service.
Section 7 Troubleshooting 39