67
TRIM TAB
SYSTEM
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The purpose of the Trim Tab System on
your 352 yacht is to assist in reaching plan-
ing speed as soon as possible and to main-
tain a proper “running attitude” while in for-
ward motion. “Running Attitude” is defi ned
as the level of the boat, both fore and aft and
athwartships, while the vessel is underway.
Your yacht, upon reaching planing speed,
should rise slightly in the bow and should not
list to either side for the greatest stability and
fuel economy. Your 352 MY is equipped with
two (2) Bennett trim tabs, each measuring
12” x 24”, which are mounted on the bottom
edge of the transom (See photographs be-
low, which illustrate the location of the Port
and Starboard trim tabs).
The Trim Tab System operates on DC
electrical power controlled by a breaker
switch, located on the AC/DC Electrical
Panel (See AC/DC Electrical Panel Layout
on Page 159, which illustrates the loca-
tion of the breaker switch that controls the
Trim Tab System). Each trim tab operates
independently of each other and they are
controlled by separate rocker-type switches,
located on the Helm Switch Panel (See
Helm Switch Panel Layout on Page 158,
which illustrates the location of the trim tab
switches). Each trim tab is actuated by a
hydraulic cylinder, which moves them in
an Up or Down position as determined by
depressing the rocker-type switches as
follows:
Depressing the TOP of the switch lowers
the trim tab.
Depressing the BOTTOM of the switch
raises the trim tab.
The Trim Tab System operates in the fol-
lowing manner:
The function of the trim tab is to redirect
the fl ow of water beyond the bottom of
the transom. This creates an upward
pressure on the hull bottom at the
transom, which results in lowering the
bow.
When the Port trim tab is lowered, the
Port stern section is raised, which lowers
the Starboard side of the bow.
When the Starboard trim tab is lowered,
the Starboard stern section is raised,
which lowers the Port side of the bow.
Both trim tabs should be lowered/raised
as needed to maintain a proper “Running
Attitude”.
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