Power Trim And Tilt - Mercury 40 JET FOURSTROKE Operation, Maintenance & Installation Manual

Power Trim and Tilt

Your outboard has a trim/tilt control called power trim. This enables the
operator to easily adjust the position of the outboard by pressing the trim
switch. Moving the outboard in closer to the boat transom is called trimming in
or down. Moving the outboard further away from the boat transom is called
trimming out or up. The term trim generally refers to the adjustment of the
outboard within the first 20° range of travel. This is the range used while
operating your boat on plane. The term tilt is generally used when referring to
adjusting the outboard further up out of the water. With the engine turned off,
the outboard can be tilted out of the water. At low idle speed, the outboard can
also be tilted up past the trim range to permit, for example, shallow water
operation.
a
b
a - Remote control trim switch
b - Panel mount trim switch
c - Tilt range of travel
d - Trim range of travel
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 your outboard all the way in or
out. Along with an improvement in some performance aspects comes a greater
responsibility for the operator, and this is being aware of some potential control
hazards.
The most significant control hazard is a pull or torque that can be felt on the
steering wheel or tiller handle. This steering torque results from the outboard
being trimmed so that the propeller shaft is not parallel to the water surface.
FEATURES AND CONTROLS
c
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d
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