PUMP SERVICE MANUAL NUMBER 23
Page 9A-4 90-861326--1 MARCH 1999
Belt Routing
75509
MCM (Sterndrive) Models
Serpentine Belt Adjustment
IMPORTANT: If a belt is to be reused, it should be installed in the same direction of
rotation as before.
1. Remove drive belt as follows:
NOTE: The upper, right (starboard) idler pulley is the belt adjustment pulley.
a. Loosen 5/8 in. locking nut on adjustment stud.
b. Turn adjustment stud and loosen belt. Remove belt.
a
b
75483
a-Adjustment Stud
b-Locking Nut
2. Install drive belt on pulleys and adjust tension as follows:
3. Loosen 5/8 in. locking nut on adjustment stud. Leave wrench on adjustment stud.
NOTE: Belt deflection is to be measured on the belt at the location that has the longest dis-
tance between two (2) pulleys. Normally this location is between the power steering pump
and the belt adjustment pulley. This location will be different on engines with closed cooling
or models without power steering.
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