5252
Helm Control Systems
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 tabs must
be equipped with a sacricial anode to prevent
galvanic corrosion. Galvanic corrosion is the cor-
rosion process occurring when dierent 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 sacricial 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 sacricial anodes or the
mounting surface under the anode. The sacricial
anode must have full metal to metal contact with
the trim tab plane or it will become ineective.
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, specications, trouble-
shooting and operating instructions.
Typical Hydraulic Jack Plate
Jack Plate Maintenance
Keep hydraulic pump connection terminals coated
with dielectric grease to prevent any connections
from being corroded as required. Grease the jack
plate at the grease ttings once or twice every
6 months. Inspect hydraulic ttings and seals
around the cylinder and pump for corrosion or
leaking. Service if leaking or corrosion occurs.
The hydraulic uid level should be checked often.
The uid level should be checked with the jack
plate in the full down position and you should be
careful not to overll the reservoir. You should
refer to the jack plate owner’s manual for main-
tenance information, specications and operating
instructions for the jack plate installed on your
boat.
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