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CA413
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.
• Frequently check crankcase oil level. Add oil if needed. It is normal for oil consumption to be high during
break-in period.
CA874
After Break-In Period
To help extend the life of your Mercury 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 recommended. Refrain from prolonged operation at maximum (full
throttle) rpm.
CA875
End of First Season Checkup
At the end of the first season of operation, an Authorized Mercury 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.
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