SERVICE MANUAL NUMBER 30
TROUBLESHOOTING
IMPORTANT INFORMATION
Section 1C - Troubleshooting
1
C
Table of Contents
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 1C-2
Poor Boat Performance and/or Poor
Maneuverability . . . . . . . . . . . . . . . . . . . . . . 1C-3
Improper Full Throttle Engine RPM . . . . . . 1C-4
RPM Too High . . . . . . . . . . . . . . . . . . . . . 1C-4
RPM Too Low . . . . . . . . . . . . . . . . . . . . . . 1C-4
Engine Cranks Over But Will Not Start
Or Starts Hard . . . . . . . . . . . . . . . . . . . . . . . . 1C-5
Important Information . . . . . . . . . . . . . . . 1C-5
Fuel System Rich . . . . . . . . . . . . . . . . . . . 1C-5
Fuel System Lean . . . . . . . . . . . . . . . . . . 1C-5
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . 1C-5
Engine Will Not Crank Over . . . . . . . . . . . . . 1C-6
Charging System Inoperative . . . . . . . . . . . 1C-6
Noisy Alternator . . . . . . . . . . . . . . . . . . . . . . . 1C-7
Instrumentation Malfunction . . . . . . . . . . . . 1C-7
Radio Noise . . . . . . . . . . . . . . . . . . . . . . . . . . 1C-7
Poor Fuel Economy . . . . . . . . . . . . . . . . . . . 1C-8
Engine Runs Poorly at Idle . . . . . . . . . . . . . 1C-8
Engine Runs Poorly At High RPM . . . . . . . 1C-9
Engine Acceleration Is Poor . . . . . . . . . . . . 1C-9
Troubleshooting with Vacuum Gauge . . . 1C-10
Engine Noise . . . . . . . . . . . . . . . . . . . . . . . . 1C-10
Important Information . . . . . . . . . . . . . . 1C-10
Valve Cover Area . . . . . . . . . . . . . . . . . . 1C-11
Cylinder Area . . . . . . . . . . . . . . . . . . . . . 1C-11
Camshaft Area . . . . . . . . . . . . . . . . . . . . 1C-12
Crankshaft Area . . . . . . . . . . . . . . . . . . . 1C-13
Miscellaneous . . . . . . . . . . . . . . . . . . . . . 1C-14
Oil Pressure . . . . . . . . . . . . . . . . . . . . . . . . . 1C-15
Miscellaneous . . . . . . . . . . . . . . . . . . . . . 1C-15
Low Oil Pressure . . . . . . . . . . . . . . . . . . 1C-16
High Oil Pressure . . . . . . . . . . . . . . . . . . 1C-16
Excessive Oil Consumption . . . . . . . . . . . . 1C-17
Water In Engine . . . . . . . . . . . . . . . . . . . . . . 1C-18
Important Information . . . . . . . . . . . . . . 1C-18
Water on Top of Pistons . . . . . . . . . . . . 1C-19
Water in Crankcase Oil . . . . . . . . . . . . . 1C-19
Engine Overheats . . . . . . . . . . . . . . . . . . . . 1C-20
Mechanical . . . . . . . . . . . . . . . . . . . . . . . 1C-20
Engine Overheats . . . . . . . . . . . . . . . . . . . . 1C-21
Cooling System . . . . . . . . . . . . . . . . . . . 1C-21
Insufficient Water Flow from Belt
Driven Seawater Pickup Pump . . . . . . 1C-22
Power Steering . . . . . . . . . . . . . . . . . . . . . . 1C-23
Poor, Erratic or No Assist . . . . . . . . . . . 1C-23
Noisy Pump . . . . . . . . . . . . . . . . . . . . . . . 1C-24
Fluid Leaks . . . . . . . . . . . . . . . . . . . . . . . 1C-24
INDEX
90-863161 SEPTEMBER 2000
Page 1C-1
| 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