Power Trim And Tilt - Mercury 135 Verado FourStroke Operation And Maintenance Manual

Power Trim and Tilt

The 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 the 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 and ignition switch turned on, 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
a - Trim switch
b - Trim range
c - Tilt range
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 the propeller shaft is not parallel to the water surface.
FEATURES AND CONTROLS
c
b
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