Onan CCK Series - Service Diagnosis Continued; Engine Misfires at All Loads; Low Oil Pressure Issues; High Oil Pressure Issues

82 S ERYIC E DIAGNOSIS
POSSIBLE CAUSE REMEDY
ENGINE MISFIRES AT
HEAVY LOAD (Cont. )
Clogged
fuel·screen.
Clean.
Defective spark plug cable. Replace.
ENGINE MlSFIRES AT ALL LOADS
Fouled spark plug.
Defective or wrong spark plug.
Leaking valves •
.
Broken valve spring.
Defective or impropedyad-
justed breaker points.
Clean and adjust.
Replace.
Grind valves.
Replace.
Adjust or replace breaker points.
LOW OIL PRESSURE
Oil too . light or diluted from
Drain, refill with proper oil. Re-
leaking fuel pump diaph:ragm. pair or r.eplace fuel pump.
Oil
too low.
Add
oil.
Oil relief valve not seating.
Remove and clean, or replace.
Badly worn bearings.
Replace.
Sludge on oil screen.
Remove and clean.
Badly worn oil pump.
Replace.
Defective oil pressure gauge.
Replace.
HIGH OIL PRESSURE
Oil
too heavy.
Drain, refill with proper oiL
Clogged
oil passage.
. Clean aU· lines. and paiilsages.
Oil
relief valve stuck.
Remove and cJean.
Defective 011 pressure gauge.
Replace.