Mercury 150 Manual page 33

FEATURES AND CONTROLS
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.
• 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 over-steering) if any turn is attempted, or if a significant wave is
encountered.
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 or
tiller handle.
• In rare circumstances, the owner may decide to limit the trim in. This can be accomplished
by purchasing a stainless steel tilt pin from your dealer and inserting it in whatever adjustment
hole in the transom brackets is desired. The non-stainless steel shipping bolt should not be
used in this application other than on a temporary basis.
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.
• 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 water line.
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. Engage the tilt support lever, by rotating knob to bring the support lever upward.
2. Lower outboard to rest on the tilt support lever.
3. Disengage the tilt support lever, by raising the outboard off the support lever and rotating the lever
down. Lower the outboard.
a - Tilt support lever
MANUAL TILTING
If the outboard cannot be tilted using the power trim/tilt switch, the outboard can be manually tilted.
WARNING
!
a
b
b -
27
ob00664
Knob