from a standing start onto plane.
UP
DN
ZMU05579
TIP:
Stay within the trim operating angle when
trimming the outboard motor using the
power tilt system.
To raise the bow (“trim-out”), tilt the engine
up.
To lower the bow (“trim-in”), tilt the engine
down.
Make test runs with the trim set to different
angles to find the position that works best
for your boat and operating conditions.
HD27912
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
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 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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