Volvo Penta 3.0GS/SX Owner's Manual page 35

When starting
Trim the drive. The bow will be pressed down and the
boat accelerates faster. This gives improved running
and steering characteristics at speeds below the pla-
ning threshold.
At planing speed
Trim the drive out to the running position which feels
comfortable 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 high-
est 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 uneven transverse load distribution (at-
hwartships), which makes the boat list during running.
33