Section 5 - Maintenance
90-879172181 eng FEBRUARY 2011 Page 113
MerCathode Anode
Checking
Inspect the MerCathode anode and replace the anode if damaged.
a - Anode
b - Reference electrode (not visible in this
view)
Replacing
Contact your Cummins MerCruiser Diesel Authorized Repair Facility.
MerCathode System Testing
If the boat is equipped with a Quicksilver MerCathode system, test the system to ensure that it is providing adequate output to
protect the underwater metal parts on the boat. The test should be made where the boat is moored, using a Quicksilver Reference
Electrode and Test Meter.
Reference Electrode 91‑76675T 1
Senses the electrical current in the water when testing the MerCathode system.
Use to check hull potential.
Contact a Cummins MerCruiser Diesel Authorized Repair Facility for testing or refer to the appropriate Cummins MerCruiser
Diesel Drive Service Manual for testing procedures.
Trim Tab Anode
Checking
1. Inspect the trim tab anodes.
2. Replace the anode if eroded 50 percent or more.
Trim tab anodes
Replacing
IMPORTANT: The trim tab cylinder is equipped with a check valve to avoid the lowering of the trim tab after shut down. When
service is required lower the trim tab before shutting the engine down.
1. Completely lower the trim tab.
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