Section 5 - Maintenance
Page 62
90-8M0099741
eng
JUNE 2015
Battery switches:
Battery switches should always be positioned so each engine is operating off of its own battery. Do not
operate engines with switches in both or all position. In an emergency, another engine's battery can be used to start an engine
with a dead battery.
Battery isolators:
Isolators can be used to charge an auxiliary battery used for powering accessories in the boat. They should
not be used to charge the battery of another engine in the boat unless the type of isolator is specifically designed for this
purpose.
Generators:
The generator's battery should be considered another engine's battery.
Serpentine Drive Belt
Serpentine Drive Belt Routing
!
WARNING
Inspecting the belts with the engine running may cause serious injury or death. Turn off the engine and remove the ignition
key before adjusting tension or inspecting belts.
With a seawater pump
a -
Alternator pulley
b -
Water circulating pump pulley
c -
Crankshaft pulley
d -
Seawater pump pulley
e -
Belt tensioner
f -
Idler pulley
Serpentine Belt Failure Identification
Appearance
Description
Cause
Solution
40791
Abrasion
Each side of the belt appears
shiny or glazed. Severe
condition: Fabric is exposed.
Belt is in contact with an object.
Can be caused by improper belt
tension or tensioner failure.
Replace the belt and
inspect for contact with an
object. Verify the belt
tensioner is functioning.
40794
Pilling
Belt material is sheared off from
the ribs and builds up in the belt
grooves.
There are a number of causes
including lack of tension,
misalignment, worn pulleys, or a
combination of these factors.
When pilling leads to belt
noise or excess vibration,
the belt should be
replaced.
a
b
c
d
e
f
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