System Components; Periodic Maintenance - MerCruiser GM4 Service Manual

System Components

The alternator system consists of the alternator, bat-
tery, the ignition switch and the wiring which connects
these components.
Ignition
Switch
Alternator
Starter
Motor
Ground
Stud
Index
4C - 22 - CHARGING SYSTEM
Battery
Meter
Harness
Plug
Circuit
Breaker
Battery
73079

Periodic Maintenance

The following maintenance check should be per-
formed every 50 hours or 60 days (whichever comes
first) in fresh water areas or every 25 hours or 30 days
in salt water areas.
! CAUTION
Remove all battery cables from battery (before
conducting the following check) to prevent acci-
dentally shorting out electrical system.
1. Inspect entire alternator system for corroded or
loose connectors.
2. Check wiring for frayed or worn insulation.
3. Check alternator drive belt for excessive wear,
cracks, fraying and glazed surfaces. Also, check
drive belt tension and adjust, if necessary, as ex-
plained under "Drive Belt Tension Adjustment."
4. Check alternator mounting bolts for adequate
tightness.
5. Inspect slip ring end frame flame arrestor screen
for debris and clean, if necessary, using com-
pressed air or a cloth. Screen MUST BE clean, or
alternator may overheat.
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