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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 MerCruiser marine engines to provide long life

and dependable performance.

CA872

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

MerCruiser power package, are highly technical pieces of

machinery. Electronic ignition and special fuel delivery systems

provide greater fuel economies, but also are more complex for the

untrained mechanic.

• Do not attempt any repairs which are not covered in this manual

unless you are aware of the precautions (“Cautions” and

“Warnings”) and procedures required. Your safety is of our

concern.

• If you attempt to service the product yourself, we suggest you or-

der the service manual for that model. The service manual out-

lines the correct procedures to follow. It is written for the trained

mechanic, so there may be procedures you don’t understand. Do

not attempt repairs if you do not understand the procedures.

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