Replacement - Mercury 4.2 Diesel Operation & Maintenance Manual

b. Rotate the automatic tensioner in the direction of the arrow.
c. Release the automatic tensioner and allow it to glide back slowly.
d. The automatic tensioner must return to the initial position and hold tension on the serpentine belt.

Replacement

IMPORTANT: If a belt is to be reused, it should be installed in the same direction of rotation as when first used.
1. Position a suitable tool in the automatic tensioner release slot.
2. Rotate the automatic tensioner in the direction of the arrow to remove the tension on the serpentine belt.
b
3. Remove the serpentine belt.
4. Replace the serpentine belt.
5. Carefully release the automatic tensioner with the breaker bar, ensuring that the belt stays positioned properly.
90-8M0113988 DECEMBER 2015
eng
a - Automatic tensioner
b - Release slot
b
a
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a - Serpentine belt
b - Release slot
a
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Section 4 - Maintenance
Page 65