Four winns S Series, Owner'S Manual

Page: 57 / 180

Owner’s Manual Page 55 Engines and Instrumentation - Section E
Al w ays press the trim tab swit ches in short one
(1) sec ond bursts. If pressed too long, you can
ove r com pen sate, and po ten tially lose con trol.
DO NOT try to cor rect the situ a tion by pressing
the other upper trim tab switch. Instead, raise
the tab slightly by pressing the appro pri ate
lower half of the trim tab switch.
After stabilization of speed and direction, press the
upper half of the appropriate trim tab switch to
achieve a level side to side running attitude. Be sure
to press the correct trim tab switch to obtain the
desired result.
After pressing a trim tab switch, always wait and
allow time for the change in trim tab position to take
effect. DO NOT continue to press the trim tab switch
while a waiting trim tab reaction. By the time the ef-
fect is noted, the trim tab will move too far and thus
overcompensate.
B. Induce Planing & Controlling Trim Angle
Trim tabs can also be used to facilitate faster planing
and allow better control of the running angle.
Before accelerating and trying to gain plane, press
both upper trim tab switches. This will cause both
trim tabs to move down ward and force the bow down
when running. This can also be used when running
the boat with a heavy load aboard.
Moving the trim tabs downward will in crease the lift
and the boat will achieve plane faster, or stay on
plane at a lower engine and boat speed.
After gaining plane and establishing cruising speed,
pressing both lower trim tab switch es will cause both
trim tabs to move up ward and will allow the bow
to rise. This should be used to adjust the run ning
attitude of the boat to decrease the drag at cruising
speed or above, or when run ning in a following sea.
When running at an engine speed that results in the
boat falling off plane or causes the boat to plane
inefficiently, lowering both tabs slightly (bow down)
will improve the running angle and improve operating
efficiency.
Optimum efficien cy is obtained when operat ing at a
3 to 5 degree running angle. Utilizing too much “Bow
Down” trim tab can reduce operat ing effi ciency and
Figure E3: Trim Tab Switches
Before leaving the dock and utilizing the trim tabs,
ensure the trim tabs are in the full up posi tion. Press
both lower halves of the trim tab switches and hold (for
approximately 10 seconds) until the tabs are full up.
A. Control Listing
Wind, loading and many other factors can result in the
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
starboard trim tab upward. This will result in the port
bow of the boat being allowed to rise.
Press ing the lower starboard trim tab switch will cause
the port trim tab to move up ward and will result in the
starboard bow being allowed to rise.
Pressing the upper port trim tab switch will cause the
starboard trim tab to move downward and will force
the port bow downward.
Pressing the upper starboard trim tab switch will cause
the port trim tab to move down ward and will force the
starboard bow downward.
Always establish your intended heading and attain
desired cruising speed before trying to adjust running
attitude (using the trim tabs).