21
INSTALLATION
GB
BOW THRUSTER BTQ140 - BTQ185 IT GB - REV002C
THE THRUSTER
To position the thruster in the tube, fi nd the half-way
point and move to the value shown (to the right or to
the left. See NOTE page 11) in the table below so that
the propeller is positioned exactly half way along the
internal length of the tunnel.
• Use the fl ange to mark the centre of the holes on the
tube.
• Fix the drilling template on the reference points,
making sure they are aligned with precision at the half-
way point of the tube.
N.B. All holes must be exactly aligned with the half-way
point of the tunnel, since tolerance between propeller
and tunnel is minimal.
• Take care that there are no resin residues in the
contact area between flange and tube; this could
cause misalignment. Any resin residues and any other
hindrance to correct contact must be removed by
sandpaper.
• The thruster can be installed at any angle within 90°
from vertical.
• If the electric motor is positioned of necessity at an
angle of more than 30° from vertical, a special support
must be constructed.
10 23456 78910
10234
10234
BTQ14 60 mm
BTQ18 80 mm
• Insert two o-rings into the special seats inside the
fl ange.
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