Volvo Penta 21182210, Operator'S Manual

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Determining the Proper Trim
The effect of the maximum “bow-up” and “bow-down”
positions will be similar for most boats. The bow posi-
tion best for your operating conditions could be at any
trim setting between the maximum “bow-up” and “bow-
down” positions.
The boat will be properly trimmed when the trim angle
provides the best boat performance for your operating
conditions. On models without power steering, the trim
position that provides a balanced steering load is desir-
able.
To familiarize yourself with the power trim, make test
runs at slower speeds and at various trim positions to
see the effect of trimming. Note the time it takes for the
boat to plane. Watch the tachometer and speedometer
readings and the ride action of the boat.
Operating in “Bow-up” Position
The “bow-up” A position is normally used for cruising,
running with a choppy wave condition, or running at full
speed. In a full “bow-up” position the boat may tend to
self-steer. You may have to compensate with the steer-
ing wheel to keep the boat in a straight-ahead path. In
this position the boat’s bow will tend to raise clear of
the water. Excessive “bow-up” trim will cause propeller
ventilation resulting in propeller slippage. Engine RPM
will also increase, but boat speed will not increase and
may even drop.
CAUTION!
Use caution when operating in rough water or crossing
another boat’s wake. Excessive “bow-up” trim may
result in the boat’s bow rising rapidly and possibly
throwing the boat’s occupants into the water.
22796
Operation
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