All Models; 20-Hour Break-In Period; End Of First Season Checkup - Mercury MCM Series Important Information Manual

All Models

20-Hour Break-In Period

IMPORTANT: The first 20 hours of operation is
the engine break-in period. Correct break-in is
essential to obtain minimum oil consumption
and maximum engine performance. During this
break-in period, the following rules must be
observed:
Do not operate below 1500 RPM for extended
periods of time for first 10 hours. Shift into gear as
soon as possible after starting and advance
throttle above 1500 RPM if conditions permit
safe operation.
Do not operate at one speed consistently for
extended periods.
Do not exceed 3/4 throttle during first 10 hours.
During next 10 hours, occasional operation at full
throttle is permissible (5 minutes at a time
maximum).
Avoid full throttle acceleration from IDLE speed.
Do not operate at full throttle until engine reaches
normal operating temperature.
Index
90-823224--2 796
After Break-in Period
To help extend the life of your MerCruiser power
package, the following recommendations should be
considered;
Use a propeller that allows the engine to operate
at or near the top of the maximum RPM range
(See "Specifications" section) when at full throttle
with a normal boat load.
Operation at 3/4 throttle setting or lower is recom-
mended. Refrain from prolonged operation at
maximum (full throttle) RPM.

End of First Season Checkup

At the end of the first season of operation, an
Authorized MerCruiser Dealer should be contacted
to discuss and/or perform various scheduled
maintenance items. If you are in an area where the
product is operated continuously (year-round
operation), you should contact your dealer at the end
of the first 100 hours of operation, or once yearly,
whichever occurs first.
MAINTENANCE - 1B-7