Determining The Proper Trim; Operating In "Bow-Up" Position - Volvo 5.0OSiE-J Operator's Manual

Operation
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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
desirable.
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 speedome-
ter readings and the ride action of the boat.
The following sections entitled Operating in "Bow-up"
Position and Operating in "Bow-down" Position pro-
vide additional information on this topic.

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 steering 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 throw-
ing the boat's occupants into the water.
VPA 7748131 English 09-2007