MAINTENANCE
109
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.
!
CAUTION
Avoid corrosion damage. Mercury Marine recommends using
anodes sold through Mercury Precision Parts only. Some other
manufacturers of aluminum anodes use alloys that are
insufficiently pure to adequately protect critical drive components
for the duration of the anodes' expected life.
IMPORTANT: Mercury Marine recommends a MerCathode
System or Anti‑Corrosion Kit be installed whenever using a
stainless steel propeller, or if the boat is equipped with stainless
steel components (immersed below the waterline) that are
connected into the engine ground system. If a boat is equipped
with stainless steel after planes, a large anode should be installed
on each to handle the increased galvanic corrosion potential.
Replace the sacrificial anodes if they are eroded 50% or more.
Summary of Contents for Racing Sterndrive 600SCi
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Page 54: ...OPERATION 44 1 7 3 5 4 6 2 1 4 2 3 6 4 2 8 6 7820 3 7 ...
Page 61: ...OPERATION 51 ...
