Power Trim - Mercury 496 MAG Bravo Owner's Manual

CB817

Power Trim

Power Trim allows the operator to adjust the drive angle, while underway, to provide the ideal boat angle for
varying load and water conditions. Also, the Power Trim system Trailering feature allows the operator to raise
and lower the drive unit for trailering, beaching, launching and low speed (below 1200 rpm engine speed),
shallow water operation.
Use extreme caution when operating with drive unit raised. Severe damage to the drive unit may result
if unit is raised beyond the gimbal ring support flanges at engine speeds above 1200 rpm.
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In most cases, best overall performance is obtained with the drive unit adjusted so the boat bottom will run
at a 3° to 5° angle to the water.
Trimming Drive Unit UP/OUT Can:
•
Generally increase top speed.
•
Increase clearance over submerged objects or a shallow bottom.
•
Cause boat to accelerate and plane off slower.
•
In excess, cause boat "porpoising" (bouncing) or propeller ventilation.
•
Cause engine overheating if trimmed UP/OUT to a point where any cooling water intake holes are above the
water line.
Trimming Drive Unit DOWN/IN Can:
•
Help the boat accelerate and plane off quicker.
•
Generally improve the ride in choppy water.
•
In most cases, reduce boat speed.
•
If in excess, lower the bow of some boats to a point at which 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.
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CAUTION
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INDEX