While starting the engine, check
that the voltmeter reads be-
tween 12.4 and 14.5 volts. An
erratic reading may be a sign
of low voltage. The voltmeter is
the best indication of the state
of your battery. However, it is
not fool-proof. While the read-
ing may indicate that the battery
is producing current, if during a
previous operation you had rea-
son 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 engine is
OFF, the voltage drain on the battery may result in difculties re-start-
ing the boat. To avoid this situation, when the voltage level falls to 11.5
volts, the system will shut off 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.
Charge dead batteries with a battery charger before attempt-
ing to start the engine. (Some MasterCraft models offer an optional
battery charger; but never jump-start the battery.) Jump-starting
from another boat or battery is dangerous! Charging a dead
battery from an engine will put undue stress on the alternator, which
may cause it to fail.
When charging, batteries generate small amounts of
dangerous hydrogen gas. is gas is highly explosive.
Keep all sparks, flames and smoking well away from
the area. Failure to follow instructions when charg-
ing a battery may cause an electrical charge or even
an explosion of the battery, which could cause death
or serious injury.
Crossing cables or jumper cables may result in dam-
age to the electrical components due to incorrect bat-
tery connections. Such damages may not be covered
by your warranty.
Inspect the Propeller
Shaft Log
for Water Entry
After approximately three (3)-to-
ve (5) minutes of boat operation
in the water, shut off the engine
and open the engine compartment.
Be careful to avoid burns from con-
tact with hot engine parts. The boat
is equipped with a dripless shaft log
and if it is showing any signs of dripping, the boat must be taken to an
authorized MasterCraft dealer’s service department for correction.
e engine box serves as a machinery guard. e en-
gine must be OFF whenever the box is open. Clothing
or body parts can get caught in moving parts, causing
death or serious injury. Keep away from moving parts!
Attention must be paid to any leakage occurring in
the propeller shaft log area. Water intrusion into the
transmission, which can happen if excessive leakage
is occurring may cause serious damage. Such damage
may not be covered by the warranty.
Inspect the
Fuel System for Leaks
This function should be performed
after about three (3)-to-ve (5)
minutes of running the engine to
determine whether any leaks are
apparent.
e engine box serves as a machinery guard. e en-
gine must be OFF whenever the box is open. Clothing
or body parts can get caught in moving parts, causing
death or serious injury. Keep away from moving parts!
After three (3)-to-ve (5) minutes of operation, shut down the
engine and ensure that the engine safety starting switch is discon-
nected. Be certain that the throttle/shift control lever is in
neutral. Again, inspect the fuel system as well as possible. If the odor
of gasoline is strong or if you see visual evidence of fuel outside the
system, cease all operations and take the boat immediately to an au-
thorized MasterCraft dealer’s service department to determine the
source of the leak. The leak must be repaired before the engine is re-
started. Because the lines on late model MasterCraft boats are pres-
surized, they can be disconnected and/or removed ONLY by using
specialized tools that are not available to the public.
This is important! Fuel leakage can lead to a build-up of
potentially explosive fumes within the engine compartment.
DO NOT IGNORE OR OVERLOOK THIS INSPECTION
AND REPAIR AS NECESSARY!
Inspect the Exhaust
System for Leaks
This function should be performed
after about three (3)-to-ve (5)
minutes to determine whether any
leaks are apparent.
Step 1: First ensure that the engine is OFF and that the engine
safety starting switch is disconnected. Be certain that the
mastercraft 2010 ow n e r ’s m anual • page 17-3
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