Onan 6GO-F - Page 40

SERVICE DIAGNOSIS
POSSIBLE CAUSE
EXCESSIVE OIL CONSUMPTION, LIGHT BLUE SMOKY EXHAUST (CONT.)
Breather Cap Clogged.
Clean - See CRANKCASE VENTILATION.
Engine misfires.
Refer to symptoms of engine mis-
fires.
Faulty ignition.
Clean, adjust, or replace breaker
points, plugs, condenser, coil, etc.,
or retime ignition.
Unit operated at light or no No remedy needed.
load for long periods.
Too much oil.
Drain excess oil.
BLACK, SMOKY EXHAUST, EXCESSIVE FUEL CONSUMPTION. FOULING OF SP A.ilK
PLUGS WITH BLACK SOOT, POSSIBLE LACK OF POWER UNDER HEAVY LOAD
Fuel mixture too rich.
Adjust choke. Install needed car-
buretor parts, adjust float level.
Choke not open.
See that choke opens properly, Se.e
ADJU S'l'MENT S.
Dirty air cleaner.
Clean, refill to proper level.
LIGHT POUNDING KNOCK
Loose connecting rod bearing.
Replace. See MAINTENANCE AND
REPAIR.
Low oil supply.
Add oil.
Low oil pressure. Refer to symptom of low oil pressure
.for remedies.
Oil badly diluted. Change oil.
ENGINE' STOPS UNEXPECT~LY
Fuel tank empty.
Refill.
High water temperature.
See symptoms for engine overheating.
Defective ignition. Check the ignition system. Repair
or replace parts necessary.
DULL METALLIC THUD. IF NOT BAD. MAY DISAPPEAR AFTER
FEW MINUTES OPERATION. IF BAD, INCREASES WITH LOAD
Loose crankshaft. Replace bearings, unless one of the
next three remedies permanently cor-
recta the trouble.
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