Specifications

NEXT FIVE HOURS OF OPERATION
Continue operation at plane and vary the engine
speed, but do not exceed 4000 RPM. Occasionally
reduce the throttle to idle speed for a cool-down period.
Carry only a light load.
NEXT TEN HOURS OF OPERATION
Operations during the final ten hours of break-in is very
much the same as the second five hours, except that it is
permissible to run at full speed for 2-3 minutes at a time.
Do not accelerate suddenly from low-to-full speed. Increase
speed gradually during this period. Again, an occasional
cool-down period is recommended.
AFTER THE FIRST
10 HOURS OF OPERATION
Return the boat to your MasterCraft dealer for the 10-
hour inspection. At this time, your service technician should
change the engine oil and filter, as well as making other
necessary checks, adjustments and services. The oil
change is particularly critical to long life and good service
from your engine!
AFTER BREAK-IN
Once the break-in period is over, the boat may be operated
continuously at any speed, but not beyond the maximum. For
the RPT-1 engine that is 4800 RPMs; the MCX is 5200
RPMs, the LQ9 Cadillac is 5400 RPMs, and the 8.1 Liter
engine is 5400 RPMs as well. MasterCraft boat engines are
equipped with rev-limiters which will cause a fluttering sound
when reached. If the boat has the correct propeller set-up,
2006 MasterCraft Owners Manual–Page 8-2
operators should never reach the limiter, but if that
happens it is a signal that you should reduce the throttle
and check with your dealer to determine the cause.
Always remember that during normal operation you
should allow the engine to warm up gradually. Be sure the
engine is warm before accelerating. Pay careful attention
to the gauges and the Check Engine indicator. Also, check
the oil level frequently during the first 50 hours of operation
since the piston rings and cylinders will require that period
to seat properly.
After the initial 50 hours of operation, the engine oil and
filter must be changed. This second oil change is very
important to ensure a long and trouble-free engine life.
(Note that the engine manufacturer does not
recommend using synthetic oils until at least 100 hours.)
After break-in, all maintenance is performed at regular
intervals.
See the Scheduled Maintenance Checks and Services
section for more details.
Failure to follow the engine oil recommendation
listed in the manual can cause additional engine
wear and increase the possibility of engine
component failure. Damage to your engine due
to incorrect oil usage can be costly to repair,
and is not covered by your warranty!