Mercury D2.8L D-Tronic Specifications Page 28

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GETTING TO KNOW YOUR POWER PACKAGE
SECTION 2
Page 20 CMD-4081850 / 90-860094030 SEPTEMBER 2003
0169
Power Trim
Power Trim allows the operator to adjust the sterndrive 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 sterndrive unit for trailering,
beaching, launching and low speed (below 1200 rpm engine speed), shallow water
operation.
CAUTION
Never trim the sterndrive unit UP/OUT using TRAILER switch while boat is under-
way at engine speeds above 1200 rpm. Use extreme caution when operating with
sterndrive unit raised. Severe damage to the sterndrive unit may result if unit is
raised beyond the gimbal ring support flanges at engine speeds above 1200 rpm.
For best performance trim the sterndrive unit so that the boat bottom is at a 3-5 degree angle
to the water.
°
3 - 5
Trimming sterndrive 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
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