Owner`s manual

MAINTENANCE
95
Corrosion and Corrosion Protection
Whenever two or more dissimilar metals (like those found on the
sterndrive) are submerged in a conductive solution, such as
saltwater, polluted water, or water with a high mineral content, a
chemical reaction takes place causing electrical current to flow
between metals. The electrical current flow causes the metal that
is most chemically active, or anodic, to erode. This is known as
galvanic corrosion and, if not controlled, it will in time cause the
need for replacement of power package components exposed to
water.
Refer to the Quicksilver booklet, Everything You Need to Know
About Marine Corrosion for more corrosion information.
!
CAUTION
Avoid corrosion damage. Do not use magnesium anodes in salt
water. They will provide overprotection, resulting in a different
electrochemical reaction that will create hydrogen on the metal
surface of the drive, under the paint. This causes the paint to
blister and peel completely from the surface of the overprotected
drive.