Getting Started; Engine Initial Break-In Procedure; Zf Inboard Transmission Initial Break-In; End Of First Season Checkup - Mercury MerCruiser Series Manual

Section 3 - On the Water
For each new boat model, the required propeller set should be predicted for a fully loaded vessel by a Marine Architect, and
should be verified by sea trial in conjunction with a responsible Integration Engineer. It is the responsibility of the boat
manufacturer and the selling dealer to equip the power package with the correct propellers.
It is important to achieve the engine rated speed and appropriate load factor when selecting propellers. Mercury Marine desires
a 92–95% load factor target at full throttle during the initial vessel sea trials. This load factor target provides allowance for
vessel fouling and additional loads the customer may add which are greater than the sea trial weight.
After initial propeller selection, the following common problems may require that the propeller be changed to a lower pitch:
1. Warmer weather and greater humidity cause an RPM loss.
2. Operating in a higher elevation causes an RPM loss.
3. Operating with increased load (additional passengers, accessories, etc.).
Because of the many variables of boat design, only testing will determine the best propeller for a particular application.
Refer to Boat in the Water Testing and Maximum RPM Test in the Engine Installation Manual.

Getting Started

Engine Initial Break‑In Procedure
With the advancement of modern lubricants and engine construction technology, no particular engine break‑in procedure is
necessary. However, for the first 50 hours of operation, do not operate the engine at high RPM for extended periods of time.
ZF Inboard Transmission Initial Break‑in
Follow the transmission operation manual recommendations for break‑in and oil change intervals.

End of First Season Checkup

At the end of the first season of operation, contact an 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.
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