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2023 OWNER’S MANUAL
• Add one (1) gallon of marine grade antifreeze to a five (5)
gallon bucket.
• Attach a garden hose to the flush valve adapter mounted on the
transom. Place the other end of the hose in the bucket with the
antifreeze.
• Start the engine and allow the engine to draw the antifreeze
into the motor. DO NOT EXCEED 1100 engine RPM. Once all the
antifreeze has been drawn out of the bucket and into the engine,
turn the engine off to prevent loss of antifreeze or overheating.
8. Use duct tape to seal exhaust flaps to prevent dirt and nesting
rodents from entering the engine or exhaust system.
9. On X26 boats equipped with a head, clean the tanks with a mild
cleaner or warm soapy water that will not harm the tank. Avoid all
petroleum-based household cleaners. Always clean and dry the
head before storage. Failure to do so may cause unnecessary odors
and damage to the tanks, which are not covered under warranty.
If using antifreeze in the head, drain the potable water tank and
add freshwater antifreeze to the potable water tank. Flush the
antifreeze and water mixture through the head and into the waste
holding tank. Then empty the holding tank. Never use automotive-
type anti-freeze in the freshwater system.
10. If the tower will be lowered during storage, be certain that the tower
does not rest on the boat upholstery or on any support that rests
on the upholstery. The tower or support(s) may leave a permanent
imprint on the upholstery. This is not covered under warranty. For
ProStar models use the black tower support legs included with the
boat from the dealership to keep the tower from resting on
the motorbox.
11. Cover the boat with a boat cover or tarp.
Note: If the boat is to be stored outside and subject to
accumulations of snow, water and ice, a MasterCraft mooring
cover with anti-pooling poles should be used. If you do not have a
MasterCraft mooring cover, a tarp or other water resistant cover
should be used with a support so that the covering will not sag,
rip or tear, thereby allowing water to enter the boat. Two-inch
diameter PVC plumbing pipe is ideal for this purpose. It is readily
available at local hardware stores, and it is easy to work with.
Also, its rounded shape will prevent damage to the canvas.
BALLAST SYSTEM
WINTERIZATION
Ballast tanks, pumps, hoses and fittings must be properly
winterized to prevent freezing damage during winter storage.
Because of the complexity of preparing a ballast system for winter
storage, as well as the possibility of extreme damage to the ballast
system if a preparation error is made, MasterCraft recommends
scheduling an appointment with an authorized dealer’s service
department to have a certified technician to perform all
winterization procedures, including ballast winterization.
MasterCraft uses a -50 F RV type, nontoxic, propylene glycol
based antifreeze to winterize every boat built at the factory.
Any antifreeze meeting these requirements is acceptable for
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