2017 OWNERS MANUAL / 372
INSPECT THE COMPLETE FUEL
SYSTEM FOR LEAKAGE AND
CHANGE FUEL FILTER
Although the boat engine is similar to an automobile engine, the
engine compartment diers substantially. The underside of an
automobile engine compartment is totally open to the atmosphere.
This allows complete air circulation and ventilation. A boat engine
is housed in a closed compartment, the underside of which is the
bottom (hull) of the boat.
The enclosed engine compartment limits the ventilation of gasoline
and oil fumes. Because confined gasoline vapors mixed with a little
air can form an explosive atmosphere, it is important to be especial-
ly vigilant in performing the following two (2) operations:
Step 1
Inspect the boat bilge area under the engine for the evidence of
oil and gasoline—or any gasoline odor. This inspection should take
place the first time the boat is started each day. Raise the engine
cover and visually look at the bilge area under the engine.
Step 4
Lubricate the cable ends and connections with a coating of
waterproof marine multi-purpose grease.
Step 5
Lubricate the pivots and linkages with a light grease.
Step 6
Shift the control lever from full-throttle-forward to full-throttle-
reverse several times to work the lubricant in.
CHECK THE BALLAST PUMP
IMPELLER
This applies only to X Series + XStar boats equipped with some type
of ballast system. The number of ballast pumps varies from system
to system. Authorized MasterCraft dealers can provide guidance to
locate any and all pumps.
Step 1
Remove two (2) of the cover screws and loosen the third screw.
Retain the screws for the reinstallation process. Swing the cover
out of the way to allow access to the impeller location.
Step 2
Using needle-nose pliers, pull the old impeller out of the casing.
Step 3
Install a new impeller. (It is intentionally larger than the case. While
gently squeezing it in, ensure that the paddle wheels angle in the
same direction—counterclockwise—all the way around.)
Step 4
Slide the plate back into place. No silicone is necessary. Due to the
built-in gasket, tightening the screws should prevent leakage.
Step 7
Rotate the steering wheel back and forth several times to work the
lubricant in.
Step 8
Reinstall the access panel.
LUBRICATE THE THROTTLE
SYSTEM
Because this process should be completed while all movable com-
ponents of the drive train are NOT in motion, MasterCraft recom-
mends this be done while the boat is out of the water.
Step 1
Ensure the engine is OFF and disconnect the engine safety starting
switch. Be sure that the throttle/shift control lever is in neutral. The
engine must be cool.
Step 2
Open the engine box and locate the shift cable end.
Step 3
Shift to full-throttle-forward.
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