SERVICE MANUAL NUMBER 30
TROUBLESHOOTING
Engine Runs Poorly At High RPM
Cause
Special Information
Also refer to Poor Boat Performance
Check oil level with boat at rest in the
water.
Crankcase overfilled with oil
Anti-siphon valve
Restricting fuel supply
Plugged fuel tank vent
Fuel supply
Refer to Fuel Injection Troubleshooting
Low grade of fuel or water in the fuel
Fouled, burned, cracked porcelain,
incorrect heat range
Spark plugs
Spark plug wires
Poor insulation, broken wires
Coils malfunctioning
Engine overheating
Low compression
Restricted exhaust
Refer to Engine Overheats
Worn valves, rings, cylinders
Engine Acceleration Is Poor
Cause
Special Instructions
Also refer to Poor Boat Performance
Vacuum leak
Spark plugs
Intake manifold
Fouled, burned; wrong heat range;
cracked porcelain
Low compression
INDEX
90-863161 SEPTEMBER 2000
Page 1C-9
| 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