Mercury 300R HD CMS Mechanical Operation And Maintenance Manual page 42

NOTE: Exceeding 4250 RPMs the engine PCM will begin Engine Guardian
protection.
a
UP
DN
a - Trim switch
b - Tilt range
c - Trim 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.
Trimming the outboard beyond a neutral steering condition may result in a
pull on the steering wheel or tiller handle and loss of boat control. Maintain
control of the boat if trimming beyond a neutral steering condition.
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
FEATURES AND CONTROLS
b
c
WARNING
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