Interphace ULTRASCAN PC90, Operation Manual

Page: 12 / 56

12
DANGER: Wood hulls and wood fairing blocks
will expand after the boat is put back into the water,
so it is important that the transducer be only hand-
tightened until the wood fully expands. Otherwise
the wood fairing block may crack.
DANGER: Be sure to check for leaks when the
boat is placed in the water. Allow at least 24 hours
after installation for any leak to appear.
Nearly all vessels have some dead rise angle at the
transducer mounting location. If the thru-hull
transducer were mounted directly to the hull, the
sound beam would be tilted off the vertical at the
same angle as the dead-rise, so most thru-hull
installations will require a fairing block to insure
the transducer is mounted properly.
If you’re installation requires a fairing block, you
may either have one made locally, or purchase a
molded plactic unit from Interphase or your
Interphase distributor. The Interphase part num-
ber for this fairing block is 40-2005-000.
NOTE
The flat top of the transducer must be
parallel to the water line. This will not
necessarily be parallel to the boat’s hull.
Hull
Hull
Waterline
Waterline
Keep parallel
to waterline !
Keep parallel
to waterline !
FORWARD
Transducer
Mount Transducer So Bronze Stem is Vertical
BronzeHex
Nut
Fairing
Block
Transducer
Boat’s
Hull
Underwater Sealant