2017 OWNERS MANUAL / 382
To winterize NXT Series boats:
1. Completely empty all ballast tanks and bags of any water that may
be in the ballast system.
2. Remove all ballast bags (if applicable) and re-attach the bridge
connector (pictured to the left) to the ballast thru hull vent hose and
the hose leading to the ballast hard tanks. Completely drain and
store the bags in a dry place.
3. With the rear ballast bags removed and the bridge connector in
place, identify the three ballast thru-hull vents on the hull sides of
NXT series boats.
4. Add one gallon of -50 F RV type nontoxic propylene glycol based
antifreeze to each of the three thru-hull vents. Colder climates
may require this same type of antifreeze with a -100 F temperature
rating.
5. Because the NXT Series uses a dierent style ballast system than
X and XT series models, the antifreeze will stay in the ballast system
during storage rather than being immediately pumped out.
Upon reactivating the boat the first time after storage, run the ballast
system to pump out the antifreeze (the engine must be on and the
boat must be in the water).
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 MasterCraft engine,
ballast, and freshwater system winterization. Be aware that colder
climates may require this same type of antifreeze with a -100 F
temperature rating.
To winterize X Series, XT Series and
ProStar models:
1. Completely empty all ballast tanks and bags of any water that may
be in the ballast system.
2. Remove all ballast bags (if applicable) and re-attach the bridge
connector (pictured right) to the ballast thru hull vent hose and the
hose to the ballast hard tanks. Completely drain and store the bags
in a dry place.
3. With the rear ballast bags removed and the bridge connector in
place, identify the three ballast thru-hull vents (see guide to each
model in this Owner’s Manual. Most models have two vents on each
hull side toward the stern, and one vent forward of the helm on the
starboard side). The ProStar only has one optional hard tank ballast,
see guide to each model in this Owner’s Manual for the ProStar’s
vent location.
4. Add one gallon of -50 F RV type nontoxic propylene glycol based
antifreeze to each of the three thru-hull vents (the ProStar only has
one vent). Colder climates may require this same type of antifreeze
with a -100 F temperature rating.
5. Once the antifreeze is in all three ballast zones, use the manual
ballast override switches mounted on the dash to empty the tanks.
This will push antifreeze through the ballast system, across all
pumps, hoses, fittings and intake valves. Be cautious while using
the override switches as antifreeze will be pumped out of the
intakes mounted to the bottom of the boat.
Some models have check valves equipped on the ballast lines. On
such models (X46 and X10 rear bags, X20 KGB tank) pour a small
amount of antifreeze into those vents (see guide to each boat in this
Owner’s Manual). The antifreeze will sit in the line during storage.
To Ballast Pump
Bridge Connector
To Thru-Hull Vent
Quick Connect
Fittings
The original bridge connector in the ballast system must be
reinstalled if the optional plug-in bags are removed from the
system. Failure to do so will result in any water in the ballast
system evacuating into the storage compartment, potentially
flooding the storage compartments. This could sink the boat,
resulting in serious injury or death.
REACTIVATING THE BOAT AFTER
STORAGE
Step 1
Remove duct tape from exhaust flaps.
Step 2
Fully charge the battery(ies) and install them in the boat, following
all safety precautions associated with changing batteries.
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