FEATURES AND CONTROLS
88
POWER TRIM OPERATION
With most boats, operating around the middle of the trim range will
give satisfactory results. However, to take full advantage of the
trimming capability there may be times when you choose to trim
the outboard all the way in or out. Along with an improvement in
some performance aspects comes a greater responsibility for the
operator, this being an awareness of some potential control
hazards.
Consider the following lists carefully:
1. Trimming In or Down Can:
• Lower the bow.
• Result in quicker planing off, especially with a heavy load
or a stern heavy boat.
• Generally improve the ride in choppy water.
• In excess can lower the bow of some boats to a point where
they begin to plow with their bow in the water while on
plane. This can result in an unexpected turn in either
direction (called bow steering or over-steering) if any turn
is attempted, or if a significant wave is encountered.
!
WARNING
Avoid possible serious injury or death. Adjust outboard to an
intermediate trim position as soon as boat is on plane to avoid
possible ejection due to boat spin out. Do not attempt to turn
boat when on plane if outboard is trimmed extremely in or down
and there is a pull on the steering wheel.
2. Trimming Out or Up can:
• Lift the bow higher out of the water.
• Generally increase top speed.
• Increase clearance over submerged objects or a shallow
bottom.
• In excess can cause boat porpoising (bouncing) or
propeller ventilation.
• Cause engine overheating if any cooling water intake holes
are above the water line.
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