Monterey Boats 278 SC Sport Cruiser, Owner'S Manual

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If the engine is trimmed in too far (closer to the boat bottom), speed
drops, fuel economy decreases, and the boat may not handle correct-
ly. However, it does provide better acceleration from a stand still; and
because it forces the bow down, visibility is improved. If the engine is
trimmed out too far (away from the boat bottom), steering torque may
increase, the boat may be difficult to get on a plane, and may bounce.
Do not trim the engine out too far or the boat may begin to
“porpoise” (bounce up and down). Porpoising reduces
control and visibility.
To use power trim effectively, always start with the engine trimmed in.
As the boat planes, increase the angle out. Experience is the best
teacher for understanding proper trim.
Trim Tabs
Water is deflected and redirected as the trim tabs are raised and low-
ered. This change in 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, mak-
ing the starboard bow lower.
Using trim tabs in conjunction with the power 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 engine drive.
! WARNING !
OPERATION
4-8
KC-1155
STERN
RISES
BOW
LOWERS
WATER IS REDIRECTED
CREATING UPWARD
FORCE AT STERN
HULL
KC-1154
PORT TAB LOWERS
PORT STERN RISES
STARBOARD BOW LOWERS
STARBOARD TAB LOWERS
STARBOARD STERN RISES
PORT BOW LOWERS