Adjusting Boat Trim - Yamaha VF200 Owner's Manual

Operation
trim angle with this switch while the
boat is moving.
Adjust the outboard motor trim angle using
the power trim and tilt switch.
UP
DN
1
1. Power trim and tilt switch
To raise the bow (trim-out), push the "
(up) side of the switch.
To lower the bow (trim-in), push the "
(down) side of the switch.
Make test runs with the outboard motor set at
different trim angles to find the position that
works best for your boat and operating con-
ditions.
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Adjusting boat trim

When the boat is on plane, a bow-up attitude
results in less drag, greater stability and effi-
ciency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tenden-
cy to steer to one side or the other. Compen-
sate for this as you steer. When the bow of
the boat is down, it is easier to accelerate
from a standing start onto plane.
62
Bow Up
Too much trim-out puts the bow of the boat
too high in the water. Performance and econ-
omy are decreased because the hull of the
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boat is pushing the water and there is more
air drag. Excessive trim-out can also cause
the propeller to ventilate, which reduces per-
"
formance further, and the boat may "por-
poise" (hop in the water), which could throw
"
the operator and passengers overboard.
Bow Down
Too much trim-in causes the boat to "plow"
through the water, decreasing fuel economy
and making it hard to increase speed. Oper-
ating with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of "bow steering" and making opera-
tion difficult and dangerous.
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