SERVICE MANUAL NUMBER 30
TROUBLESHOOTING
Noisy Alternator
Cause
Special Information
Loose mounting bolts
Drive belt
Worn, frayed, loose
Loose drive pulley
Worn or dirty bearings
Faulty diode trio or stator
Instrumentation Malfunction
Cause
Special Information
Faulty wiring, loose or corroded terminals
Faulty key switch
Faulty gauge
Faulty sender
Radio Noise
Cause
Special Information
A popping noise that will increase with en- Ignition System - wrong spark plugs;
gine rpm. Noise will stop as soon as en-
gine is turned off.
leaking spark plug wires; moisture on
ignition components
High pitched whine in the radio
Alternator - poor brush contact on the slip
rings
A hissing or crackling noise when instru-
ments are jarred with ignition on
Instrumentation - loose connections, or
antennae wire routed too close to instru-
ments
Accessories - bilge pump, bilge blower;
fish finder, depth locator; cabin heater
motor, etc. Disconnect one at a time until
noise disappears.
Varying unexplained noises
INDEX
90-863161 SEPTEMBER 2000
Page 1C-7
| 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