Furuno FSV-84, Installation Manual

Page: 11 / 95

1-3
1.1.2 Shortening the retraction tank
Shorten the tank as necessary so that the transducer positions well below the keel when it is
fully lowered. The following table provides guidelines for shortening the tank. Refer also to
the retraction tank installation drawing at the back of this manual.
Installation
Method
800 mm
stroke
1100 mm
stroke
Remove
0-50 mm
from the
bottom.
Remove
0-50 mm
from the
bottom.
Same as left.
Same as left.
Remove 0-50 mm
from the bottom.
Note that the length
"D" must be less than
1000 mm.
Remove 0-50 mm from
the bottom. Note that
the length "D" must be
less than 1200 mm.
Same as left.
Same as left.
D
D
Stroke
Guidelines for shortening the retraction tank
Note 1: The transducer will lower to mid-protrusion (500/800 mm stroke) if the tank is not
shortened. However, if it is shortened more than 50 mm, the transducer cannot be
completely retracted.
Note 2: When maximum length is removed and “D” is minimum, the effect of air foam is
minimized because the transducer fully protrudes in water.