Volvo Penta 4.3GL Instruction Book page 34

32
When starting
Trim the drive. The bow will be pressed down and the boat ac-
celerates faster. This gives improved running and steering
characteristics at speeds below the planing threshold.
At planing speed
Trim the drive out to the running position which feels comforta-
ble and the boat feels stable and smooth.
For maximum fuel economy
Run boat at a constant throttle opening. Trim the drive out/in a
little. The boat is most easily propelled and speed will increase
in the position that gives the highest engine speed. The throttle
opening can then be slightly reduced to retain the original
speed.
In choppy seas or running against a heavy sea
Trim drive so the bows drop. This will provide more comfortable
running.
WARNING! High speed running in a heavy sea is
dangerous. High speed running in a heavy sea requires
the driver's maximum attention and a boat of the right size
and design for this type of running.
Side winds
If the boat has a dual installation the drives can be trimmed at
different trim angles. This compensates for side winds or une-
ven transverse load distribution (athwartships), which makes
the boat list during running.