Onan 6GO-F - Page 39

SERVICE DIAGNOSIS
POSSIBLE CAUSE
HIGH OIL PRESSURE
au too heavy.
Clogged
oil passage.
Oil relief valve stuck.
Defective oil pressure gauge.
Drain,
refill with proper oil. See
PREPARATION.
Clean all lines and passages.
Remove and clean. See LUBRICATION
SYSTItM.
Replace.
PLANT STARTS BUT DOES NOT CONTINUE TO RUN
START button released too soon.
Hold
in contact longer.
Defective panel equipment. See Controls.
ENGINE BACKFIRES AT CARBURETOR
Lean fuel mixture.
Clogged
fuel screen.
Intake air leak.
Poor tuel.
Spark too late.
Spark plug wires crossed.
Intake valves. leaking .•
EXCESSIVE OIL CONSUMPTION,
Worn piston rings.
Oil leaks from engine or connec-
tions •. This does not cause
smoky exhaust.
OU too
light or diluted.
Too large bearing clearance·.
Oil pres sure too higb..,
,'i ','1
. RING REPLACllMENT •
. Replace gaskets
or leaking·tubing.
Tigb.ten screws and conneetions~
Drain, refill with correct oil. See
PREPARATION.
.Replace bearings. See' MAINTENANCE AND
REPAIR.. ..
Refer to symptoms of higb. oil pressure
for remedies. .
Clean
carburetor.
Clean screen.
Replace flange gaskets, tighten
carburetor.
Refill with good, fresh tuel.
Retime ignition. See IGNITION TIMING.
Install wires correctly. See IGNITION
TIMING.
Grind or replace. See VALVE SERVICE.
LIGHT' BLUE SMOKY EXHAUST
Install new piston rings. 'See PISTON'
33