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Section 3 - On the Water
4.
Operate the engine in gear for 3 minutes at each of the following RPM: 1500 RPM, 2800 RPM and 3400 RPM.
5.
Operate the engine in gear for 3 minutes at each of the following RPM: 1800 RPM, 3000 RPM and maximum rated full throttle
RPM.
Sterndrive 10‑Hour Break‑In Period (New or With Replacement Gears)
It is important that the following procedure be used on new sterndrives and rebuilt sterndrives with new replacement gears. This
break‑in procedure allows the proper seating of the sterndrive gears and related components, which greatly reduces the likelihood
of problems.
•
Avoid full throttle starts.
•
Do not operate at any one constant speed for extended periods of time.
•
Do not exceed 75% of full throttle during the first 5 hours. During the next 5 hours, operate at intermittent full throttle.
•
The sterndrive should be shifted into forward gear a minimum of 10 times during break‑in, with run‑in time at moderate RPM
after each shift.
Engine Break‑In
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, observe the following rules:
•
Do not operate below 1500 RPM for extended periods of time for the first 10 hours. Shift into gear as soon as possible after
starting and advance the 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 the first 10 hours. During the 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 the engine reaches normal operating temperature.
•
Check engine oil level frequently. Add oil as needed. High oil consumption is normal during the break‑in period.
After the 20-Hour Break-In Period
To help extend the life of your power package, Cummins MerCruiser Diesel recommends the following:
•
Change the engine oil and filter at the interval indicated in the Maintenance Schedule. See Specifications and
Maintenance.
•
Use a propeller that allows the engine to operate at the rated engine RPM when at full throttle with a fully loaded boat. See
Specifications and Maintenance.
•
Operation at 3/4 throttle setting or lower is recommended. Refrain from prolonged operation at wide‑open throttle RPM.
End of First Season Checkup
At the end of the first season of operation, contact a Cummins MerCruiser Diesel Authorized Repair Facility to discuss or perform
scheduled maintenance items. If you are in an area where the product is operated continuously, year‑round, you should contact
your dealer at the end of the first 100 hours of operation or once yearly, whichever occurs first.
Page 34
90-8M0057081
MARCH 2011
eng
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