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CD608
Sterndrive Unit 10-Hour Break-In Period
It is especially important that the following procedure be used on new sterndrive units. This break-in procedure
allows the proper seating of drive unit gears and related components, which greatly reduces the likelihood of
problems.
1. Avoid full throttle starts.
2. DO NOT operate at any one constant speed for extended periods of time.
3. DO NOT exceed 75% of full throttle during the first 5 hours. During the next 5 hours, operate at intermittent
full throttle.
4. Drive unit should be shifted into forward gear a minimum of 10 times during break-in, with run-in time at
moderate rpm after each shift.
CA211
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.
CA414
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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