PURSUIT Denali 28, Owner'S Manual

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DENALI 28
2.7 Trim Tabs
The Denali 28 uses a dual toggle switch to control the trim tabs.
The switch is labeled and controls bow up and down move-
ments. 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.
Before leaving the dock, make sure that the tabs are in the full
“UP” position by holding the control in the bow up position for
ten (10) seconds.
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 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 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 attitude will improve the ride. Be careful not to over
trim. Handling difficulties may result.
Trim Tab
2-4
Trim Tab Switch