Section 5 - Maintenance
90-864195070 JUNE 2007 Page 99
2. Turn the adjustment stud and loosen the belt.
3. If a new serpentine drive belt is required, remove the old belt and install a new belt onto
the pulleys.
4. Put a wrench on the adjustment stud 16 mm (5/8 in.) locking nut.
5. Use a 8 mm (5/16 in.) socket and tighten adjusting the stud to adjust the belt deflection.
6. Using one of the 2 methods following, check for correct deflection.
a. Push down with moderate thumb pressure on the longest stretch of belt. Proper
deflection is 13 mm (1/2 in.).
b. Attach the Kent Moore Belt Tension Gauge to the belt. The gauge has different
ranges for new and used belts.
COLOR GUIDE
for
PATENT
2.83918
NEWTONE
NEWTONE
b
a
14980
a - Kent Moore Tension Gauge b - Serpentine belt
7. While holding the adjustment stud at the correct belt tension, tighten the
16 mm (5/8 in.) locking nut.
a
b
6119
a - 16 mm (5/8 in.) locking nut b - 8 mm (5/8 in.) adjusting stud
8. Operate the engine for a short period of time and recheck the belt adjustment.
Corrosion Protection
Corrosion Information
Whenever two or more dissimilar metals are submerged in a conductive solution, such as
saltwater, polluted water or water with a high mineral content, a chemical reaction takes
place causing electrical current to flow between metals. The electrical current flow causes
the metal that is most chemically active, or anodic, to erode. This is known as galvanic
corrosion. For more information contact your authorized Mercury MerCruiser dealer and
refer to the Mercury Precision Parts / Marine Corrosion Protection Guide
(90‑881813003).
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