2013 MasterCraft Owners Manual • Electronic Instrumentation • Page 3-13
Sport Enhancement Controls
Attitude Adjustment or
Trim Tab Switch
(All X-Series)
MasterCraft utilizes Lenco attitude adjustment plate kits
on several models. A single plate kit is used on the X2, X25,
X30, X35, X45, and X55. If used properly, the plate improves
the ride, reduces drag, increases speed and improves the fuel
eciency of the boat.
The operation of the attitude adjustment plates is basic. The
plane or planes are mounted with the actuator(s) on the tran-
som of the boat. When the plate(s) is/are lowered, the water
flow is redirected, creating an upward force at the stern of the
boat. When the stern rises, the bow will lower.
Since these actuators are electromechanical, they provide an immediate response
at the touch of the switch. The switch adjustments are based on the position of the bow.
On the dual attitude adjustment plate system, the right side of the switch controls the
starboard plate and the left side of the switch controls the port plate. On the single plate
system, there is only one switch control.
The system is set up this way to minimize the guesswork while underway. Press
DOWNtolowerthebow.PressLEFTtorolltheboattotheleft,andRIGHTtorolltheboat
to the right.
Since our models have dierent
weights, lengths, speed and per-
formance, it will take some practice
for the operator to understand how
your boat reacts with the attitude
adjustment plates installed. The
plates will allow your boat to get on
plane faster and continue planing at
lower speeds. This will improve vis-
ibility and the overall safety of your
boat. When making adjustments
with the attitude adjustment
plates, use short momentary taps
of the switch. Continued practice
will help you become familiar with
how the plates perform.
Special Conditions
Head Sea: Lower both plates by tapping slightly BOW DOWN on both sides of a dual
system, BOW DOWN on a single system. This will bring the bow down while maintain-
ing speed. This also allows the hull of the boat to absorb the impact of the waves. This
adjustment will result in a more ecient and smoother ride. Changes should be made in
small increments to ensure maintaining control of the boat.
Following Sea: Make sure the plates are fully retracted by pressing BOW UP on both
sides of a dual system, and BOW UP on a single system. This will bring the plate(s) up to
a fully retracted position, decreasing lift in the stern and allowing the bow to rise. If the
plate(s) is/are deployed, the bow may dig.
Windy Chop: To raise the windward side of the boat on dual systems, press BOW UP
on that side. If this is not sucient press BOW DOWN on the leeward side of the boat. Do
not over-trim when attempting this. This will allow the windward side of the boat to rise
and will minimize spray.
Shallow Water/Hole Shot: Lower both plates completely on a dual system by press-
ing BOW DOWN on both sides (the single plate on a single system). This provides lift in