2021 OWNERS MANUAL / 370
DO NOT IGNORE OR OVERLOOK THIS INSPECTION! REPAIR AS
NECESSARY!
BEFORE EACH USE
Afer Starting the Engine
Check That The Battery Is Fully Charged
As the boat is started, check all gauges (base X and XT series
analog gauges, X, XT, Star and NXT Series video display), but pay
particular attention to the voltage.
While starting the engine, check that the voltmeter reads between
12.4 and 14.5 volts. An erratic reading may be a sign of low voltage.
The voltage reading is the best indication of the status of your bat-
tery, however it is not fool-proof. While the reading may indicate that
the battery is producing current, if during a previous operation you
had reason to suspect a problem with your battery, check with an
authorized MasterCraft dealer’s service department.
Current models are equipped with a low-voltage battery alarm. In
the event that the stereo has been functioning when the boat en-
gine is OFF, the voltage drain on the battery may result in diculties
restarting the boat. To avoid this situation, when the voltage level
falls to 10.5 volts, the system will shut o the stereo system and
sound an alarm for a period of two (2) minutes to allow the operator
time to turn the ignition key ON and start the engine. Doing so will
allow the engine’s alternator to recharge the battery.
NOTE ANY EXHAUST ODORS
This function should be performed prior to starting the engine; and
then again after about three (3)-to-five (5) minutes to determine
whether any leaks are apparent.
Step 1
First ensure that the engine is OFF and that the engine safety start-
ing switch is disconnected. Be certain that the throttle/shift control
lever is in neutral. The engine must be cool.
Step 2
Open the engine compartment and note whether there is any un-
usual odor. In many instances, exhaust will have little or no odor, but
in the event of a potentially significant exhaust leakage, it may be
possible to smell a “rotten-egg” odor that signifies a probable issue
that must be addressed.
Step 3
If leakage is apparent, tighten the hose clamps, being careful to
avoid crimping the hose. If the leakage is significant, or is occurring
at a location other than the joints (such as a split in a hose), see
your authorized MasterCraft dealer’s service department for parts
and service.
Exhaust fumes can cause illness or impairment, including carbon
monoxide poisoning. Equally important to consider, leakage can
lead to a build-up of potentially explosive fumes within the engine
compartment.
2021MCOwnerManualFINAL.indd 370 8/26/20 1:54 PM
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