Crevalle Boats 33 CSF, Owner'S Manual

Page: 50 / 188

50 50
Helm Control Systems
Engine Lubrication
Please refer to the engine owner’s manual for
maintenance and lubrication instructions for the
outboard engines.
Trim Tab Maintenance
The trim tab actuators are electric and require no
routine maintenance except to periodically inspect
the tab actuators for corrosion or marine growth
and test the system to ensure that it is operating
properly.
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 sacrificial anode to pre -
vent galvanic corrosion. Galvanic corrosion is the
corrosion process occurring when different 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 sacrificial anodes.
To discourage any marine growth on the tabs or
actuators, antifouling paint can be applied. When
applying paint to the actuators, make sure they
are fully retracted. Do not paint the stainless ram
above the area that is exposed when fully retract-
ed. The bottom paint will damage the O-ring seals
when the ram is retracted and allow seawater to
Trim Tab Actuators, Plane & Anode
enter the actuator motor. When painting the trim
tabs, do not apply paint to the sacrificial anodes
or the mounting surface under the anode. The
sacrificial anode must have full metal to metal
contact with the trim tab plane or it will become
ineffective. 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, specifications, trouble -
shooting and operating instructions.