Onan 6GO-F - Page 38

SERVICE DIAGNOSIS
POSSIBLE CAUSE
ENGINE MISFIRES AT HEAVY LOAD
Spark plugs defective.
FaUlty ignition.
Clogged carburetor.
Clogged fuel screen.
Defective spark plug cables.
Replace.
Clean, adjust, or replace breaker
points, plugs, condenser, coil, etc.,
or retime ~gnition.
Clean jets.
Clean.
Replace.
ENGINE MISFIRES AT ALL LOADS
Fouled spark plug.
Defective or wrong spark plug.
Sticking valves.
Broken valve spring.
Defective ignition wires.
Defective or,improperly
adjusted points~
Clean and adjust.
Replace.
Clean stems and
guides.
Replace.
Replace.
Adjust or replace breaker points.
See Periodic Service - Weekly.
LOW OIL PRESSURE
Too long screw on center main
bearing.
Oil too light.
Oil badly diluted.
Oil too low.
Oil relief valve not seating.
Badly worn bearings.
Sludge on oil PU/llP screen.
Badly worn oil pump.
Defective oil pressure gauge.
See
MAIN BEARINGS.
Dra;1.r refill with proper oil.
See PREPARATION.
Drain, refill with proper oil.
Add oil.
Remove and clean, or replace.
See LUBRICATION SYSTEM.
Replace. See MAINTENANCE AND
REPAIR.
Remove and clean.
Replace.
Replace.
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