MasterCraft prostar 190 2011 Owner'S Manual Download

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Attitude Adjustment or Trim Tab Switch

(All MariStars and CSX 265)

MasterCraft utilizes Lenco attitude adjustment plate kits on several models. Dual plate kits are available on
the MariStar 280, X-80, 280 STS and CSX 265 models; a single plate kit is used on the MariStar 200, X-2, 215,
X-15, 230, X-30, 235, X-35, 245 and X-45. On the dual attitude adjustment plate system, the plates operate
independently of each other to provide optimal performance by redirecting water flow near the transom of the
boat. These plates have been designed to improve the overall attitude of a boat. If used properly, the plates will
improve the ride, reduce drag, increase speed and improve the fuel efficiency of the boat.

The operation of the attitude adjustment plates is basic. The plane or planes are mounted with the

actuator(s) on the transom of the boat. When the plate(s) is/are lowered, the water flow is redirected, creat-
ing 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 im-

mediate 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. To lower the starboard bow, press the right (starboard)
switch where it reads DOWN. To lower the port bow, press the left
(port) switch where it reads DOWN. On the single plate system,
press DOWN.

Since our models have different weights, lengths, speed and

performance, it will take some practice for the operator to under-
stand how your boat reacts with the attitude adjustment plates in-
stalled. The plates will allow your boat to get on plane faster and
continue planing at lower speeds. This will improve visibility 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 maintaining speed. This also allows the hull of
the boat to absorb the impact of the waves. This adjustment will result in a more efficient 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 sys-

tem, 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 sufficient 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 pressing BOW DOWN on

both sides (the single plate on a single system). This provides lift in the stern of the boat and will keep the
bow down. As you throttle up and speed increases, raise the tab(s) by pressing BOW UP on both sides of a dual
system, and BOW UP on the single system.

Uneven Load:

When equipped with a dual system, if one side of the boat is higher than the other while

running, press BOW DOWN on the switch on that side. This will lower the tab on the listing side (low side) to
bring the boat level.

Porpoising:

To stop porpoising, press BOW DOWN on both sides of a dual plate system, BOW DOWN on

a single system. The plate(s) needs only to be deployed slightly to correct this adverse situation.

While operating attitude adjustment plates use caution. Improper use of plates can cause accidents,

which may result in serious injury or death.
While the boat is underway do not move one plate up or down significantly as this may cause listing.

While at higher speeds do not over-trim, as this will cause the bow to lower quickly, resulting in a

reduction of speed and may cause the boat to veer.
When in following seas or when running an inlet, the plates should be fully retracted. This will allow for optimal
performance.
ELECTROMECHANICAL ACTUATORS PROVIDE AN INSTANT RESPONSE. WHEN MAKING ADJUSTMENTS, USE
SHORT MOMENTARY TAPS OF THE SWITCH.

2011 Owners Manual...Instrument Gauges and Switches...Page 5-2