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CA22
REPLACEMENT SERVICE PARTS
!
WARNING
Electrical, ignition and fuel system components on MerCruiser gasoline pow-
er packages are designed and manufactured to comply with U.S. Coast Guard
rules and regulations to minimize risks of fire or explosion.
Use of replacement electrical, ignition or fuel system components, which do
not comply to these rules and regulations, could result in a fire or explosion
hazard and should be avoided.
When servicing the electrical, ignition and fuel systems, it is extremely impor-
tant that all components are properly installed and tightened. If not, any elec-
trical or ignition component would permit sparks to ignite fuel vapors from
fuel system leaks, if they existed.
Marine engines are expected to operate at or near full–throttle for
most of their life. They are also expected to operate in both 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 auto-
motive engine.
For example, one of the most important, and probably the least sus-
pected 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 maxi-
mum RPM much of the time, special valve springs, valve lifters, pis-
tons, bearings, camshafts and other heavy-duty moving parts are re-
quired for long life and peak performance.
These are but a few of the many special modifications that are re-
quired in MerCruiser marine engines to provide long life and depend-
able performance.
Alpha V8
17
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