Mercury 40 CT Maintenance And Installation Manual page 41

FEATURES AND CONTROLS
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
• Increase steering torque or pull to the right (with the normal right hand
rotation propeller)
• 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 oversteering) if
any turn is attempted, or if a significant wave is encountered.
Operating the boat at high speeds with the outboard trimmed too far under
can create excessive bow steer, resulting in the operator losing control of
the boat. Install the trim limit pin in a position that prevents excessive trim
under and operate the boat in a safe manner.
• In rare circumstances, the owner may decide to limit the trim in. This is
accomplished by repositioning the tilt stop pins into the desired
adjustment holes in the transom brackets.
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
• Increase steering torque or pull to the left at a normal installation height
(with the normal right hand rotation propeller)
• In excess, can cause boat porpoising (bouncing) or propeller ventilation
• Cause engine overheating if any cooling water intake holes are above the
waterline
TILTING OPERATION
To tilt outboard, shut off the engine and press the trim/tilt switch or auxiliary tilt
switch to the up position. The outboard will tilt up until the switch is released or
it reaches its maximum tilt position.
1. Press the knob in and rotate it to engage the tilt support lever.
2. Lower outboard to rest on the tilt support lever.
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WARNING
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