Section 4 - Maintenance
Page 78 90-8M0113859 eng DECEMBER 2015
• Avoid any electrical interconnection between the paint and the Mercury MerCruiser product, anodic blocks, or
MerCathode system by allowing a minimum of 40 mm (1.5 in.) unpainted area on the transom of the boat around
these items.
a - Painted boat transom
b - Unpainted area on transom
2.
Painting the sterndrive unit or transom assembly: The sterndrive unit and transom assembly should be painted with a
good‑quality marine paint or an antifouling paint that does not contain copper, tin, or any other material that could conduct
electrical current. Do not paint drain holes, anodes, MerCathode system, or items specified by the boat manufacturer.
NOTICE
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.
3. Do not power‑wash a sterndrive that has a MerCathode assembly. Doing so can damage the coating on the reference wire
of the MerCathode assembly and increase corrosion.
Sterndrive Surface Care
Standard Bravo sterndrive
a - Sacrificial trim cylinder anode
b - Sacrificial anodic plate
c - Steering lever ground wire
d - Ground wire between the gimbal ring and bell housing
e - Stainless steel hoses
f - Ground wire between the gimbal housing and trim cylinder
g - Ground wire between the gimbal ring and gimbal housing
We recommend the following maintenance items to help keep your sterndrive corrosion‑free:
• Maintain a complete paint covering on the sterndrive.
• Check the finish regularly. Prime and paint nicks and scratches using Mercury enamel paint and touch up paint. Use only
tin‑based antifouling paint or its equivalent on or near aluminum surfaces below the waterline.
• If bare metal is showing, apply two coats of paint.
b
a
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