MasterCraft NXT20 2017, Owner'S Manual

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2017 OWNERS MANUAL / 258
Special Attention
On the X10, XT23, X46, and XStar models, GEN2 WSDs are limited
to seventy-five percent (75%) maximum extension when the
boat speed exceeds twenty miles per hour (20 mph) or thirty-two
kilometers per hour (32 km/h).
On the X20 and X23 models, GEN2 WSDs are limited to seventy-five
percent (75%) maximum extension when the boat speed exceeds
twenty five miles per hour (25 mph) or forty kilometers per hour
(40 km/h).Maneuvering a boat with the WSDs extended requires
practice to master. Initial times running with the surf tabs extended
should be done at low speed with plenty of room. This is critical to
learning how the WSDs affect control and maneuverability, espe-
cially when actuating WSDs with the attitude adjustment plate(s).
Electromechanical actuators provide an instant response. When
making adjustments, use short momentary taps of the switch.
Large adjustments to the surf tabs may result in loss of control
which could cause serious injury or death.
BALLAST SYSTEMS
Models
A triple hard tank ballast system is standard on all XStar, X Series, XT
Series and NXT Series boats (exception: X23 four tanks plus optional
bags, X20 four tanks only standard, NXT20 Global Edition). These
ballast tanks cannot be removed after the boat has been built due to
tight tolerance between the deck and the Hull. The GEN2 Surf System,
explained immediately prior to this section has additional plug-in
ballast bags. The bags connect through quick-connect fittings located
in the rear storage compartment.
The ProStar ballast system functions similar to X Series boats,
but features just a single MTS hard tank designed for competition
training.
The NXT Series ballast is laid out similar to the X Series, with optional
quick-connect bags when selected (the NXT Series does not feature
GEN2 software).
Purpose
Ballast systems are specially designed for each model to enhance
the boating experience. By creating deeper, more dynamic waves and
wakes, beginners and professionals alike experience more enjoyable,
and even record-setting experiences. For simple outings and
improved, faster handling, ballast systems can be left empty.
Location
Ballast tanks are located under the deck, in the hull, hidden from
sight. Optional plug-in bags are located in the rear storage areas,
on either side of the engine compartment. The XStar’s front ballast
bags are located under the bow seating. All Star Series, X Series and
XT Series ballast fill and empty locations are underwater and should
be kept clear of debris (see Care and Maintenance section of this
Owner’s Manual for more detail). NXT Series modes pump ballast
water in from the hull bottom, but pump water out of thru-hull vents
located on the hull’s sides. Ballast overflow vents are located on the
side of the hull. Depending on the model, the overflow may be on the
bow or the gunwale (see Guide to Individual Models in this Owner’s
Manual to determine the location of ballast overflow). Fill, empty and
overflow locations should never be obstructed. In addition to the
manual switches on the driver’s armrest, ballast fill levels can also
be controlled via any X Series or Star Series video display (see Video
Display Gauge section of this Owner’s Manual).
Operation
The three-position switches are clearly marked: FILL, OFF (in
center), and EMPTY. Toggle the switch in the direction desired. Be
certain to return the switch to OFF when functions are complete.
When the tank(s) is/are full, operators will see water being
evacuated out of the ballast overflow vents on either the gunnel or
hull side (see Guide to Individual Models in this Owner’s Manual to
determine the location of the ballast overflow).
The ballast system in X Series, XStar and ProStar models operates
on an automated system that shuts down automatically when the
emptying process has been completed.
The NXT ballast system is not automatic. The ballast system on the
NXT is full and should be switched back to OFF when water can be
seen pumping out of the ballast thru-hull vent. When emptying the
tanks, water is pumped out of the hull-side vents. When tanks are
empty, the water flow off the side of the boat stops. When the water
flow out of the thru-hull vent stops, the switch must be shut OFF.
Failure to return the manual operation switch on an NXT ballast
system to OFF after emptying the tanks can cause the ballast
pumps to fail. Such failure is not covered under warranty.
On models equipped with optional plug-in bags, if the bags are
emptied and disconnected from the system, the original bridge
connector MUST be reinstalled. Failure to do so will allow any water