MasterCraft NXT20 2023, Owner'S Manual

Page: 340 / 490

2023 OWNER’S MANUAL / 334
First Hours of Operation
The first hours of operation affect the engine and drive train
more than any other component on the boat. Therefore, it is very
important to follow the break-in procedure EXACTLY as outlined
in the engine owner’s manual.
Engine manufacturers have detailed and specific requirements
for proper engine break-in. That information is found in the engine
manual supplied, and must be followed exactly as indicated.
Failure to do so could cause engine damage and/or failure that is
not covered under warranty.
After Break-In
Once the break-in period is over, the boat may be operated
continuously at any speed, but not beyond the maximum
indicated in the engine owner’s manual.
The engines are equipped with rev-limiters which will cause a
fluttering when reached. If the boat has the correct propeller set-
up, operators should never reach the limiter, but if that happens,
it is a signal that you should reduce the throttle and check with an
authorized MasterCraft 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 video
screen(s). Also, check the oil level frequently during the first
fifty (50) hours of operation since the piston rings and cylinders
require that much time to seat properly.
See the Scheduled Maintenance Checks and Services section for
more details.
Failure to follow the engine oil recommendations listed in the
engine owner’s manual can cause additional engine wear and
increase the possibility of engine component failure. Damage to
the engine due to incorrect oil usage can be costly to repair, and it
is not covered by the warranty!
Note* For additional information, please refer to Ilmor’s Owners
Manual pages 26-27 for “Pre-25 Hours”, “Post-25 Hours”,
“After Each Use” and “Long Term Storage” recommendations.
844-GO-ILMOR (464-5667) www.ilmor.com