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.
After gaining plane and establishing cruising speed,
pressing both lower trim tab switches will cause both
trim tabs to move upward 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 running 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
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 downward 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).
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
cause substan tial stee ring and handling difﬁcul ties.
Be extreme ly careful when running in a following sea.
The effect of trim tabs is ampli ﬁed under such condi-
tions. Steer ing and handling difﬁculties can result from
improper trim tab usage, especially in a following sea.
If unsure of proper trim tab positioning, raise the trim
tabs to the full-up position.
Always press the trim tab switches in short one
second bursts. If pressed too long, you can
overcompensate, and potentially lose control.
DO NOT try to correct the situation by pressing
the other upper trim tab switch. Instead, raise
the tab slightly by pressing the appropriate
lower half of the trim tab switch.
When running at high engine speeds, be sure
the trim tabs are in the full up position. Trim tab
action should be only enough to compensate
for any list ing. Trim tab ad just m ents at high
speeds are ex tre mely critical. Be prepared to
slow down should handling difﬁculties arise.
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
awaiting trim tab reaction. By the time the effect is
noted, the trim tab will move too far and thus overcom-
When running in a displacement (very slow speed)
mode, better efﬁciency will be obtained with the trim
tabs in the full-up position.
C. Trim Tab Maintenance
B. Induce Planing & Controlling Trim Angle
Check the ﬂuid level of the trim tab reservoir often.
Always keep the ﬂuid level between the designat ed
marks on the trim tab pump-reservoir. Refer to the
manufacturers information for speciﬁ cations on the
type of ﬂuid to be used and other operation and
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 downward and force the bow down
when running. This can also be used when running
the boat with a heavy load aboard.
E - 9 ENGINE INSTRUMENTATION
The helm station is equipped with a complete set of
engine instruments. These instruments allow the pilot
Moving the trim tabs downward will increase the lift
and the boat will achieve plane faster, or stay on plane to constantly monitor the operational condition of the
at a lower engine and boat speed.
engine. Close observation of these instruments could
save the engine from damage.
Engines, Drives and Instrumentation - Section E
Owner’s Manual Page 61
|Categories||Four Winns Manuals, Four Winns V-Series Manuals|
|Tags||Four Winns V375|
|Document Type||Owner's Manual|
|Product Brand||Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx|
|Document File Type|
|Wikipedia's Page||Outboard Marine Corporation|
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