SERVICE MANUAL NUMBER 25
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
Test, as outlined in SECTION 4D
Test, as outlined in SECTION 4D
Test, as outlined in SECTION 4D
Faulty sender
Radio Noise
Cause
Special Information
A “popping” noise that will increase with
Ignition System - wrong spark plugs;
engine rpm. Noise will stop as soon as en- cracked distributor cap; cracked coil tower;
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- Instrumentation - loose connections, or
ments are jarred with ignition on
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
90-861328--1
NOVEMBER 1999
Page 1C-13
| 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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