Volvo Penta KAD/KAMD300, Operator'S Manual

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34
Operation
Power Trim while running
The Power Trim adjusts the drive angle to the stern of the
boat to obtain maximum comfort and fuel economy at dif-
ferent speeds, with varying loads, and in a range of wind
and sea conditions.
Power Trim settings and adjustment are controlled from the
helm position using the controls and instruments described
in the Power Trim section.
WARNING! Avoid over-trimming the drive system as
this can adversely effect the steering of the boat se-
verely.
The engine must not be run with the drive in the “Lift”
range.
IMPORTANT! Avoid running with the drive fully
trimmed for long periods (when planing). Apart from
excessive fuel consumption this can cause cavity
damage to the propeller(s).
Operating with the drive in the Trim range
The Trim range is used to achieve maximum comfort under
normal operation at all speeds from start to maximum
speed.
Since every boat has its own unique characteristics and
will be effected in different ways by the factors involved,
only general advice is given here on how to get the best
trimming angle for your boat. It can generally be said that
when the boat feels well-balanced, easy to steer and pleas-
ant to operate, then that is the optimal trim angle for the
boat.
When starting
Trim the drive. The bow will be pressed down and the boat
accelerates faster. This gives improved running and steer-
ing characteristics at speeds below the planing threshold.
At planing speed
Trim the drive out to the operating position which provides
the most stable and comfortable running.
If the boat has twin motors the drives can be trimmed with
different angles to compensate for side winds and to a cer-
tain extent compensate for uneven loading on one side of
the boat or the other.