Low Oil Pressure
Cause
Special Information
Low oil level in crankcase
Verify with an automotive test gauge. Refer to
Section 4D for instrument testing.
Defective oil pressure gauge and/or sender
Oil broken down; contains water or gas; wrong
viscosity; engine running too hot or too cold;
excessive idling in cold water (condensation)
Thin or diluted oil
Oil pump
Relief valve stuck open; pickup tube restricted;
worn parts in oil pump; air leak on suction side of
oil pump or pickup oil tube
Oil passage plugs leaking, cracked or porous
cylinder block
Oil leak can be internal or external
Excessive bearing clearance
Cam bearings, main bearings, rod bearings
High Oil Pressure
Oil too thick
Wrong viscosity, oil full of sludge or tar
Verify with an automotive test gauge
Defective oil pressure gauge and/or sender
Clogged or restricted oil passage
Oil pump relief valve stuck closed
Index
90-823224--2 796
TROUBLESHOOTING - 1C-23
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you