Do not pressure‑wash the MerCathode assembly, if equipped. Doing so will damage the coating on the reference electrode
wire and decrease the corrosion protection.
MerCathode mounted to the underside of the
gimbal housing, if equipped
a - MerCathode reference electrode, if
equipped
b - Do not paint
c - Do not pressure wash
IMPORTANT: Replace sacrificial anodes if eroded 50% 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.
MerCathode system—The electrode assembly, if equipped, replaces the anode block. The system should be monitored to
ensure adequate output. After the boat has been moored for a minimum of eight hours, inspect the MerCathode control module
LED for a visual indication on the state of protection. Refer to MerCathode Theory of Operation.
Description
Location Figure
Alpha sterndrive
gearcase anodic plate
Mounted on the underside of the lower gearcase.
Alpha sterndrive
gimbal housing anode
Mounted on the underside of the gimbal housing.
Bravo sterndrive
gearcase anode plate
Mounted on the underside of the lower gearcase.
20336
Alpha and Bravo sterndrive
ventilation plate anode
Mounted on the front of the gearcase.
20338
Section 4 - Maintenance
Page 74 90-8M0128973 eng MAY 2017
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