SERVICE MANUAL NUMBER 25
TROUBLESHOOTING
Excessive Oil Consumption
Cause
Special Information
One quart of oil consumed in 5-15 hours
of operation at wide-open-throttle (espe-
cially in a new or rebuilt engine) is normal
Normal consumption.
Clean bilge, run engine with clean white
paper on bilge floor, locate oil leak(s)
Oil leaks
Oil too thin
Oil diluted or wrong viscosity
Oil level too high
Drain holes in cylinder head plugged
Defective valve seals
Oil will flood valve guides
Intake manifold gasket leaking
Worn valve stems or valve guides
Defective oil cooler (if equipped)
Crack in cooler tubes
Glazed, scuffed, worn, stuck, improperly
installed; ring grooves worn; improper
break-in; wrong end gap
Defective piston rings
Out of round, scored, tapered, glazed;
excessive piston to cylinder clearance;
cracked piston
Defective cylinders
Excessive bearing clearance
90-861328--1
NOVEMBER 1999
Page 1C-23
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 1262 CID, Mercury MerCruiser 262 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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