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Section 5 - Maintenance
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
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.
f
e
d
Serpentine Belt Failure Identification
Appearance
40791
40794
Page 62
With a seawater pump
a
a -
Alternator pulley
b -
Water circulating pump pulley
c -
Crankshaft pulley
b
d -
Seawater pump pulley
e -
Belt tensioner
f -
Idler pulley
c
55041
Description
Abrasion
Each side of the belt appears
shiny or glazed. Severe
condition: Fabric is exposed.
Pilling
Belt material is sheared off from
the ribs and builds up in the belt
grooves.
WARNING
!
Cause
Belt is in contact with an object.
Can be caused by improper belt
tension or tensioner failure.
There are a number of causes
including lack of tension,
misalignment, worn pulleys, or a
combination of these factors.
Solution
Replace the belt and
inspect for contact with an
object. Verify the belt
tensioner is functioning.
When pilling leads to belt
noise or excess vibration,
the belt should be
replaced.
90-8M0099741
JUNE 2015
eng
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