Mercury 4.2 Diesel

Section 4 - Maintenance
Page 74 90-8M0113987 eng DECEMBER 2015
Description Location Figure
Alpha sterndrive
gearcase anodic plate
Mounted on the underside of the lower gearcase.
22405
Alpha sterndrive
gimbal housing anode
Mounted on the underside of the gimbal housing.
53380
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
Alpha and Bravo sterndrive
trim cylinder anodes
Mounted on each of the trim cylinders.
20342
Alpha and Bravo sterndrive
bearing carrier anode
Located in front of the propeller, between the front
side of the propeller and the gear housing.
20343
MerCathode System
The MerCathode electrode, if equipped, is mounted
to the underside of the gimbal housing. The
MerCathode controller is mounted on the engine or
on the boat transom. The controller harness
connects to the electrode harness.
20340
Anode kit (if equipped) Mounted to the boat transom.
20341
In addition to the corrosion protection devices, take the following steps to inhibit corrosion: