Operations
NOTE:
Stop the engine before adjusting the trim angle.
Use care to avoid being pinched when removing or installing the rod.
Use caution when trying a trim position for the first time. Increase speed gradually and watch for
any signs of instability or control problems. Improper trim angle can cause loss of control.
The outboard motor trim angle can be changed approximately 4 degrees by shifting the trim rod
one hole.
Adjusting boat trim
When the boat is on plane, a bow-up attitude results in less drag, greater stability and efficiency.
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 tendency to steer to one side or the other. Compensate for this as you
steer. The trim tab can also be adjusted to help offset this effect. When the bow of the boat is
down, it is easier to accelerate from a standing start onto plane.
Bow Up
Too much trim-out puts the bow of the boat too high in the water. Performance and economy 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 performance further, and the
boat may “porpoise” (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. Operating with excessive trim-in at higher speeds also makes
the boat unstable. Resistance at tile bow is greatly increased, heightening the danger of “bow
steering” and making operation difficult and dangerous.
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