MAINTENANCE
40
Replacement Service Parts
!
WARNING
Avoid fire or explosion hazard. Electrical, ignition, and fuel
system components on Mercury Marine products comply with
U.S. Coast Guard rules to minimize risk of fire or explosion. Do
not use replacement electrical or fuel system components that
do not comply with these rules. When servicing the electrical and
fuel systems, properly install and tighten all components.
Marine engines are expected to operate at or near full throttle for
most of their life. They are also expected to operate in fresh and
saltwater environments. These conditions require numerous
special parts. Care should be exercised when replacing marine
engine parts, as specifications are quite different from those of the
standard automotive engine.
For example, one of the most important, and probably the least
suspected special replacement part, is the cylinder head gasket.
Since saltwater is highly corrosive, the steel‑type automotive head
gasket cannot be used. A marine engine head gasket uses special
materials to resist corrosive action.
Since marine engines must be capable of running at or near
maximum RPM much of the time, special valve springs, valve
lifters, pistons, bearings, camshafts and other heavy‑duty moving
parts are required for long life and peak performance.
These are but a few of the many special modifications that are
required in Mercury Marine engines to provide long life and
dependable performance.
Do‑It‑Yourself Maintenance Suggestions
If you are one of those persons who likes to do‑it‑yourself, here are
some suggestions for you.
• Present‑day marine equipment, such as your Mercury Marine
power package, are highly technical pieces of machinery.
Electronic ignition and special fuel delivery systems provide
greater fuel economies, but are more complex for the
untrained mechanic.
Summary of Contents for HP1200 SCi Dry Sump
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