SEALINE S450, Owner'S Manual

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TRIM SYSTEM INSTRUCTIONS
CAUTION
STEERING & HANDLING DIFFICULTIES MAY
RESULT IF TRIM TABS ARE USED FULLY
DOWN ABOVE 20 KNOTS
At the start of the trim always the higher side trim down and not vice versa!
When making adjustments, use short momentary taps of the switch.
GETTING ON PLANE WHEN PLANING
During initial acceleration, the tabs can be dropped
(bow down) to bring the boat on plane faster, to
improve forward visibility, and use less power. As
the boat comes on plane, the tabs are brought up
so the bow does not plow. The tabs can be further
manually adjusted for the best performance when
the boat conditions are temporarily outside the
norm-like when fully loaded.
SMOOTHING THE RIDE CONDITION CORRECTION
In heavier water, a head sea can create an
uncomfortable, jarring ride. Put the tabs to a mid-
position. As the wave throws the bow up, tabs
dampen the boat's reaction, levelling and
smoothing the ride. In a following sea, put the tabs
up. This allows the bow to lift, offsetting the waves
which lift the stern. In milder water, some boats
gently porpoise. Drop the tabs, a little at a time,
until the lope disappears.
CORRECTING A LIST CONDITION CORRECTION
Listing may be caused by an unbalanced load. A
little down tab on the side of the heavy load levels
the ride. List may also occur in a quarter following
sea. Waves lift the stern unevenly, causing the
boat to pitch forward and roll opposite the lift. If the
starboard transom is lifting, drop the port tab a
little. This removes the listing and produces a
dryer, more level ride.
LOW SPEED TRIM
In controlled speed zones, many boats start to fall off plane as the speed decreases, thereby reducing visibility.
Lowering both trim tabs keeps a boat on plane longer at legal, lower speeds, while maintaining a level boat attitude. At
idle speed, bow steering (wandering side to side) requires constant correction to maintain a heading. Dropping both
tabs creates stern drag which improves tracking. Tabs can also help reduce roll. When a boat is at rest, a wave which
normally would cause rolling must first move water out of the way-from above one tab and below the other. This
dampens rolling.