343 Owner’s Manual
3-13
Operating Information
Trim Tabs
The trim tabs, if equipped, are a separate system in
themselves and are not to be used in lieu of the
drive unit power trim system. Water is deflected
and redirected as the trim tabs are raised and
lowered. This change in the water flow creates
upward pressure under the tabs, and raises the
stern. When the stern raises, the bow is lowered.
Likewise, lowering the port tab will cause the port
stern to raise, making the starboard bow lower.
Using trim tabs in conjunction with the drive trim will
compensate for uneven weight distribution, listing,
water conditions and other factors that cause
inefficient operation. Remember that trim tabs are
trimming the hull while power trim is trimming the
drive unit.
Some systems may include indicators to show
position of the tabs and drive units.
PORT TAB LOWERED
PORT STERN RISES
STARBOARD BOW LOWERS
STARBOARD TAB LOWERED
STARBOARD STERN RISES
PORT BOW LOWERS
COB_0067_A
STERN
RISES
WATER IS REDIRECTED
CREATING UPWARD
FORCE AT STERN
COB_0068_A
BOW
LOWERS
HULL
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