NEW BOAT BREAK- IN
10-1
New Boat Break-In
Note: Failure to follow the break-in procedure exactly as stated will void the engine warranty.
The first 20 hours of operation are the most important to your boat. Proper break-in will ensure maxi-
mum performance and the longest possible power train life. The break-in period allows moving parts within
the engine and transmission to wear-in properly. All MasterCraft boats are lake-tested on the water before
leaving the factory, but the break-in must continue for the first 20 hours of your ownership.
Note: Before operating the
boat for the first time, you must
read this manual completely.
Please follow the break-in procedure carefully.
Close attention to the following is very important:
• Maintain the proper oil level. Until the piston rings, cylinder and other working
internal parts are thoroughly seated, oil consumption can be high and must be carefully watched. The
oil requirement is for SAE 15W40, AP SJ/CH4. If the specified oil is not available, 20W40 oil may be substituted
by only if it meets the API SJ/CH4 standards.
• Pay close attention to the gauges. It is important to stop the engine immediately if the gauges indicate a
problem. Low oil pressure and overheating are serious issues and require immediate attention.
• Abnormal vibration or noises. These symptoms can precede trouble and should not be ignored. Occasion-
ally, hardware may work loose, mountings may need tightening or the driveline may require attention.
• Fuel, oil or water leaks. Leaks can pose a serious safety threat. If one occurs, it is most likely to do so after
a few hours of operation.
• Vary the engine speed. Never run the engine for more than three (3) minutes at any constant RPM during
the break-in period. Doing this will assist in the proper break-in of rings and bearings.
• Plane the boat quickly. Operating the boat at low speeds places an excessive load on the engine. Plane
quickly, then back down to a slower planing speed.
To ensure proper break-in and lubrication, boat owners should not remove
the factory break-in oil until after the initial ten (10) hours of operation. At
that time, an oil change should be performed by an authorized MasterCraf
t service technician/your local MasterCraft dealer.
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