Bravo sterndrive shown
a - Sterndrive
b - Ground washer
c - Ground plate (later model)
Ground washer shown inside anode cavity
of Bravo Three gear housing, other models
similar
a - U‑joint bellows ground clip
b - Exhaust bellows ground clip
MerCathode
If the boat is equipped with a MerCathode system, the system should be tested to ensure that it is providing adequate output to
protect the underwater metal parts on the boat. The test should be made with the boat moored, using a reference electrode and
test meter.
Reference Electrode
91‑76675T 1
Refer to the appropriate Mercury MerCruiser sterndrive service manual for testing procedures.
Power Package Exterior Surfaces
1. Spray the entire power package at recommended intervals with Corrosion Guard. Follow the instructions on the can for
proper application.
Tube Ref No.
Description Where Used Part No.
120
Corrosion Guard Painted surfaces 92-802878 55
2. Clean the entire power package. External surfaces that have become bare should be repainted with the recommended
primer and spray paint at recommended intervals.
Description
Part Number
Mercury Light Gray Primer
Painted surfaces
92‑802878 52
Mercury Phantom Black 92‑802878Q 1
Maintenance
Page 1C-28 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015
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