
2005
MASTERCRAFT
OWNERS
MANUAL
–
PAGE
9-1
BREAK-IN
NEW
B O A T
> > > > > >
The first 20 hours of operation are the most important to your boat. Proper break-in will
ensure maximum 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 con-
tinue for the first 20 hours of your ownership.
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 MasterCraft service technician/your local MasterCraft dealer.
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 but 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. Occasionally, 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.
Note:
Failure
to
follow the
break-in
procedure
exactly as
stated will
VOID
the
engine warranty.
Note: Before
operat-
ing
the boat for the
FIRST TIME,
you must
read this
manual
completely.