Mercury TDI 3.0L Owner's Operation And Maintenance Manual page 77

a
b
Washing the MerCathode assembly can damage components and lead to rapid corrosion. Do not use any cleaning
equipment such as brushes or high‑pressure washers to clean the MerCathode assembly.
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.
b
a
c
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
Alpha sterndrive
gearcase anodic plate
90-8M0145546 MAY 2018
eng
f
a
b
c
e
c
d
Mounted on the underside of the lower gearcase.
Dual sterndrive
a - Anode (Alpha models), MerCathode (Bravo models)
b - Ventilation plate anode
c - Trim cylinder anodes
d - Bearing carrier anodes
e - Gearcase anodic plate
f - Anode kit on hull (if equipped)
e
d
35213
NOTICE
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
55028
Location
Section 4 - Maintenance
Figure
22405
Page 69