Blackfin 272 - Page 50

5050
H elm C ontrol S y stem s
Marine growth can interfere with the proper op-
eration of the trim tab planes and actuators. To
reduce problems due to marine growth, always
return the trim tabs to the full “UP” position af-
ter operating the boat and periodically inspect
and clean marine growth from the actuators and
planes.
If the boat is kept in the water, the trim tab planes
must be equipped with a sacricial anode to pre-
vent galvanic corrosion. Galvanic corrosion is the
corrosion process occurring when dierent metals
are submerged in an electrolyte. Seawater is an
electrolyte and submerged metal components
must be properly protected. The anodes will need
to be changed when they are 75% of their original
size (25% depleted). Refer to the Routine Main-
tenance chapter of this manual for information on
maintaining sacricial anodes.
To discourage any marine growth on the tabs or
actuators, antifouling paint can be applied. When
applying paint to the actuator, make sure it is fully
retracted. Do not paint the stainless ram above
the area that is exposed when fully retracted. The
bottom paint will damage the O-ring seals when
the ram is retracted and allow seawater to enter
the actuator motor. When painting the trim tabs,
do not apply paint to the sacricial anodes or the
mounting surface under the anode. The sacricial
anode must have full metal to metal contact with
the trim tab plane or it will become ineective.
Contact your dealer or the trim tab manufacturer
for information regarding the correct bottom paint
for the trim tabs.
Refer to the trim tab owner’s manual for additional
maintenance information, specications, trouble-
shooting and operating instructions.
Trim Tab Actuator, Plane & Anode