Trim Tabs - Blackfin 272CC Owner's Manual

DANGER
SOME JOYSTICKS AND ELECTRONIC CONTROL SYSTEMS
ARE EQUIPPED WITH A "SKYHOOK" FEATURE WHICH USES
THE ENGINES TO AUTOMATICALLY HOLD THE BOAT IN
POSITION. THIS FEATURE CAN CAUSE SERIOUS INJURY
OR DEATH TO PERSONS SWIMMING NEAR THE BOAT OR
ATTEMPTING TO BOARD WHEN IT IS ACTIVATED.
WHEN SKYHOOK IS ACTIVATED:
THE PROPELLERS ROTATE AUTOMATICALLY;
PROPELLER ROTATION MAY NOT BE OBVIOUS;
THE BOAT MAY SUDDENLY MOVE IN ANY DIRECTION;
THE PROPELLERS CAN INJURE PEOPLE IN THE WATER
ANYWHERE AROUND THE BOAT.
IF YOUR BOAT IS EQUIPPED WITH "SKYHOOK," THE
FOLLOWING PRECAUTIONS APPLY:
ALWAYS ASK THE CAPTAIN BEFORE ENTERING THE WATER.
UNLESS THE CAPTAIN GIVES YOU PERMISSION:
DO NOT GO IN THE WATER; WIND OR WATER CURRENT CAN
MOVE SWIMMERS INTO THE PROPELLERS.
D O N O T S I T O R S TA N D W H E R E Y O U C O U L D FA L L
OVERBOARD; YOU MAY LOSE YOUR BALANCE IF THE BOAT
MOVES SUDDENLY.

4.8 Trim Tabs

The trim tabs are mounted to the hull below the
swim platform and integrated transom engine
mounting system. A dual rocker switch is used to
control the trim tabs. The switch controls bow up
and down movements. It also controls starboard
and port up and down movements. Bow up and
bow down will control the hull planing attitude,
while port and starboard up and down provides
control for the hull listing.
An LED indicator built into the switch displays the
position of the trim tabs. When one LED is flash-
ing at the top of the display, the tabs are in the
"full-up" (bow up) position. When all LED lights
are lit from the top to the bottom of the display,
the tabs are fully extended (bow down).
The trim tabs are programmed to automatically
retract when the engines are shutdown to keep
the actuators clean and set the tabs in the full
"UP" position when leaving the dock. Refer to the
trim tab operating manual for more information on
the operation and programming of the trim tabs.
Before leaving the dock, make sure that the tabs
are in the full "UP" position. If they are not, press
and hold the control in the bow up position for ten
(10) seconds to fully retract the tabs.
Helm Control Systems
Typical Trim Tab Switches
Lenco Trim Tab Control Switch
Trim Tab Plane & Actuator
Always establish the intended heading and cruise
speed before attempting to adjust the hull attitude
with the trim tabs. After stabilizing speed and
direction, move the trim tabs to achieve a level
side to side running attitude being careful not to
over trim.
After depressing a trim tab switch, always wait a
few seconds for the change in the trim plane to
take effect. Avoid depressing the switch while
awaiting the trim plane reaction. By the time the
effect is noticeable the trim tab plane will have
moved too far and thus the boat will be in an
overcompensated position.
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