Crevalle Boats 24 Bay, Owner'S Manual

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Control Systems
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.
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.
When running at a speed that will result in the
boat falling off plane, lowering the tabs slightly,
bow down, will improve the running angle and
operating efficiency. Too much bow down tabs can
reduce operating efficiency and cause substantial
steering and handling difficulties.
Be extremely careful when operating in a following
sea. The effect of trim tabs is amplified under such
conditions. Steering and handling difficulties can
result from improper trim tab usage, particularly
in a following sea. Always raise the tabs to the
full bow up position in these conditions.
When running at high speeds be sure that the
tabs are in the full “UP” position. Only enough
trim plane action should be used to compensate
for any listing. Trim tabs are extremely sensitive
at high speeds. Adjust for this and be prepared
to slow down if difficulties arise.
When running into a chop, a slight bow down at-
titude will improve the ride. Be careful not to over
trim. Handling difficulties may result.
4.9 Control Systems Maintenance
Control Maintenance
Periodic inspection of the control systems and all
connections should be made. Signs of rust, cor-
rosion, wear or other deterioration should imme-
diately be serviced. Generally, periodic lubrication
Trim Tab Plane & Actuator
of all moving parts and connections with a light
waterproof grease is in order.
Lubrication should be performed as often as nec-
essary to keep the system operating smoothly.
Control system adjustments may become neces-
sary. If adjustments become necessary, see your
Crevalle dealer.
WARNING
DO NOT ATTEMPT CONTROL ADJUSTMENTS UNLESS YOU ARE
FAMILIAR WITH SERVICING CONTROL SYSTEM PROCEDURES.
CONTROL MISADJUSTMENT CAN CAUSE LOSS OF CONTROL
AND SEVERE ENGINE OR LOWER UNIT DAMAGE.
Hydraulic Steering System Maintenance
A periodic inspection of all steering hoses, linkage
and helm assemblies should be made. Signs of
corrosion, cracking, loosening of fasteners, ex-
cessive wear or deterioration should be corrected
immediately.
The fluid level for hydraulic steering should be
checked frequently and maintained at the proper
level. For hydraulic steering without assist, the
fluid level at the vent/fill plug at the helm should
be maintained at no less than 1/2” below the
bottom of the filler cap threads. If your boat is
equipped with the optional spotting tower and up-
per helm, the steering fluid level must be checked
and filled at the upper helm.