Drive Belts; Drive Belt; Drive Belt Failure Identification - Mercury TDI 4.2L Manual

8. Install the propeller shaft anode and secure with the screw. Tighten the screw to the specified torque.
b
a
i
j
g h
Description
Propeller shaft anode screw

Drive Belts

Drive Belt

All drive belts must be periodically inspected for tension and condition. Turn the engine off and remove the ignition key before
inspecting for excessive wear, cracks, fraying, and glazed surfaces.
Inspecting the belts with the engine running may cause serious injury or death. Turn off the engine and remove the ignition
key before inspecting the belts.
In the event that the drive belt requires replacement, it is recommended that the drive belt replacement be performed by a
Mercury Diesel–authorized repair facility.

Drive Belt Failure Identification

Appearance
40791
40794
90-8M0114081 DECEMBER 2015
eng
e
f
d
c
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.
Bravo Three
a -
b -
c -
d -
e -
f -
g -
h -
i -
j -
5304
WARNING
!
Cause
The belt is in contact with an object.
This 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.
Section 4 - Maintenance
Rear propeller nut
Rear propeller
Rear propeller thrust hub
Front propeller nut
Front propeller
Front propeller thrust hub
Propeller shaft anode screw
Flat washer
Star washer
Propeller shaft anode
Nm lb‑in.
19 168
Solution
Replace the belt and
inspect its route for
contact with another
object. Verify that the belt
tensioner is functioning.
When pilling leads to belt
noise or excess vibration,
the belt should be
replaced.
lb‑ft
–
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