Grady-White Boats Chesapeake 290, Owner'S Manual

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H E S A P E A K E
8–13
T
RIM
T
ABS
Trim tabs are electrically and hydraulically operated. The trim tab system includes a hydraulic
pump, a switch with an integrated indicator, and an auto-retract feature. The switch controls the
pump which lowers and raises the trim tabs. The indicator keeps you constantly aware of the trim
tab’s position. The auto-retract feature automatically raises the tabs every time the ignition switch
is turned off.
Trim tabs are used to regulate the attitude of the boat while moving and will aid in trimming
the boat fore and aft for a smoother ride. Trim tabs can improve the ride of your boat by adjusting
where the water is hitting the keel line. In a slight chop, the waves may be hitting the keel of your
boat around the helm area causing an uncomfortable ride. By adjusting the trim tabs and lowering
the bow, the waves will hit the keel at a more forward point and soften the ride. Experimenting
with trim tabs in various sea conditions will help you determine the best positions for your boat
under different load conditions.
Trim tabs are also useful in correcting a port or starboard running list. If the boat is listing to
the port side, press the starboard trim tab switch toward “bow down”. Press the port trim tab
switch toward “bow down” to correct a starboard list. This will tend to lower the bow by pulling
the higher side to a level position. If your bow is already in a low position and your tabs are down,
you may correct a listing condition by pressing the trim tab switch toward “bow up”. This will
cause the low side to rise and level the boat. The running angle will also gradually improve.
Trim tabs in the extreme “bow up” positions will have no effect on the boat's ride. Trim tabs in
the extreme “bow down” position will cause the boat to come on plane with minimum bow rise.
Unless you are operating at low speeds or with considerable cockpit weight you will likely want
to raise the tabs slightly when underway to avoid “plowing” water. With the tabs in the “bow
down” position, you will be able to maintain a plane at the least possible RPMs.
Trim Tab Pump Location
The Chesapeake 290 trim tab pump is located on the port outboard side of the aft berth.
It can be accessed through the port wall panel. The hydraulic fluid level should be checked on
a seasonal basis.