Sterndrive Corrosion Protection Components - Mercury 2.8 Diesel Operation & Maintenance Manual

Section 4 - Maintenance
Without sufficient cooling water, the engine, the water pump, and other components will overheat and suffer damage. Provide
a sufficient supply of water to the water inlets during operation.
5. Ensure that the seawater pickup pump is supplied cooling water.
6. Start the engine and check for leaks

Sterndrive Corrosion Protection Components

To help control the effects of galvanic corrosion, sterndrives come with several sacrificial anodes and other corrosion protection
devices. For a more comprehensive explanation of corrosion and corrosion protection, refer to the Marine Corrosion
Protection Guide.
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.
Page 72
f
a
b
c
f
a
b
c
e
c
d
NOTICE
Typical single 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 lower hull
e
d
35214
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 lower hull
e
d
35213
NOTICE
90-8M0113987 DECEMBER 2015
eng