Section 5 - Maintenance
90-864197076 NOVEMBER 2008 Page 87
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.
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 - 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).
Maintaining Ground Circuit Continuity
The transom assembly and sterndrive are equipped with a ground wire circuit to ensure good electrical continuity between the
engine, transom assembly, and sterndrive components. Good continuity is essential for the MerCathode System to function
effectively.
MerCathode System Battery Requirements
The Mercury MerCruiser MerCathode system requires a minimum battery charge of 12.6 volts at all times to maintain functionality.
Boats equipped with a MerCathode system that use shore power, and are not run for a long period of time, must use a battery
charger to maintain a minimum battery charge of 12.6 volts or above.
Boats equipped with a MerCathode system that do not have access to shore power must be operated often enough to maintain
a minimum battery charge of 12.6 volts or above at all times.
Anodes and MerCathode System Locations
IMPORTANT: Replace sacrificial anodes if eroded 50 percent or more.
The following sacrificial anodes are installed at different locations on your power package. These anodes help protect against
galvanic corrosion by sacrificing its metal to be slowly eroded instead of the metal components on the power package.
COLOR GUIDE
for
PATENT
2.83918
NEWTONE
NEWTONE
b
a
14980
a
b
6119
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