TROUBLESHOOTING
SERVICE MANUAL NUMBER 30
Low Oil Pressure
Cause
Special Information
Low oil level in crankcase
Defective oil pressure gauge and/or
sender
Verify with an automotive test gauge.
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
Cause
Special Information
Oil too thick
Wrong viscosity, oil full of sludge or tar
Defective oil pressure gauge and/or
sender
Verify with an automotive test gauge
Clogged or restricted oil passage
Oil pump relief valve stuck closed
INDEX
Page 1C-16
90-863161 SEPTEMBER 2000
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 496 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(2 votes, average: 4 out of 4)
Marine readers have rated Mercury MerCruiser 496 CID 8.1L Gasoline Marine Engines Service Manual Number 30 4.0 out of 4.0 based on 2 product reviews. How many openings for crankcaseventilation is there on
Merc 496 HO ?
Great down load . it was all there an more