Four winns vista Owner's Manual page 49

E - 7 RUNNING ANGLE
Hull planing surfaces have the least amount of drag at a
three to five degree angle with the water. This is the pre-
ferred running angle when boating. The running angle
has a significant impact on top speed and handling. Heavy
load or certain water conditions may make it difficult to
achieve the optimum running angle. See Figure E6.
The running angle can be controlled through the use of
trim tabs. See Section E-8 - Trim Tabs, for information
on the use of trim tabs.
Figure E6: Running Angle
E - 8 TRIM TABS
Electric/hydraulic trim tabs are standard equipment and
help provide maximum control of the hull in all water and
load conditions. If used properly, trim tabs can
a. Compensate for wind and load listing (level the boat
side to side).
b. Induce faster planing and help achieve optimum run-
ning angle (see Section E-7 Running Angle.
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basic understanding of trim tab operation and some prac-
tice in calm water. Be sure to read the manufacturer’s
literature included in the owner’s packet.
The trim tab control uses two (2) momentary-type rocker
switches. The trim tab switches control the attitude or
position of the boat. The trim tab switches are labeled by
position such as “Bow Up” and “Bow Down”. They are
also labeled for “Port” and “Stbd”. When depressed, the
label indicates what happens to the bow of the boat.
Before leaving the dock and utilizing the trim tabs, ensure
the trim tabs are in the full up position. Depress both
lower halves of the trim tab switches and hold (for ap-
proximately 10 seconds) until the tabs are full up.
A. Control Listing
Wind, loading and many other factors can result in the
0 0
3 to 5
boat tilting or leaning towards one side while running. This
is called listing and can be negated using trim tabs.
Pressing the lower port trim tab switch will move the star-
board trim tab upward. This will result in the port bow of
the boat being allowed to rise.
Pressing the lower starboard trim tab switch will cause
the port trim tab to move upward and will result in the
starboard bow being allowed to rise.
Depressing the upper port trim tab switch will cause the
starboard trim tab to move downward and will force the
port bow downward.
Depressing the upper starboard trim tab switch will cause
the port trim tab to move downward and will force the
starboard bow downward.
Always establish your intended heading and attain de-
sired cruising speed before trying to adjust running atti-
tude (using the trim tabs).
Always press the trim tab switches in short 1/2
second bursts. If depressed too long, you can
overcompensate, and potentially lose control. DO
NOT try to correct the situation by depressing
the other upper trim tab switch. Instead, raise
the tab slightly by depressing the appropriate
lower half of the trim tab switch.
Section E
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