Interphase Sea Scout Operation Manual page 16

MOLDED FAIRING BLOCK
If your installation requires a fairing block, you
may either have one made locally, or purchase
a molded plactic unit from Interphase or your
Interphase distributor.
For this transducer, the molded Fairing Block
Part Number is:
42-2004-000
OPTIONAL SPEED/TEMPERATURE
TRANSDUCERS
INTERPHASE DESCRIPTION
PART #
T1-0200-021 Transom mount S/T
transducer
T1-0200-027 Thru-hull mount S/T
transducer
04-0009-008 30' Speed/Temp extension
cable
Both the transom and thru-hull S/T transducers are
separately installed. The transom mount S/T
transducer can be used with the thru-hull depth
only transducer if desired. The S/T transducer
cable and the depth only transducer cable both
plug directly into the back of the display unit.
To order, call your local Interphase dealer, or
Interphase directly at (831)477-4944.
Installing the Thru-hull Transducer
1) Drill a 1/8" pilot hole from inside the hull to assure access
to tighten the housing nut and clearance for the transducer
cables. If there is any hull irregularity near the mounting
location, it may be desirable to drill from the outside.
2) Use a 1-1/16" hole saw and drill the hole from the outside
of the hull. Sand or clean the area around the hole, inside and
outside to insure that the sealing compound will adhere
properly to the hull. Select a marine grade adhesive sealant,
such as 3M 5200, and use according to the instructions.
3) Remove the bronze hex nut from the housing and cable.
4) Uncoil the transducer cable and thread it through the hole
into the inside of the hull. DANGER: DO NOT apply
tension to the transducer cables as this may sever internal
connections.
5) Apply a 1/8" thick layer of sealant on the upper flat
surface of the transducer, bronze alignment pin and fairing
block (if used).
6) From the outside of the hull, push the housing into the 1"
hole. Twist the housing slightly to squeeze out excess
sealant. Carefully confirm that the transducer is aligned so
that the round front end is pointed directly toward the front of
the boat.
7) Install and tighten the bronze hex nut (allow for swelling
in wooden hulls).
8) Remove excess sealant from the outside to assure smooth
water flow over the transducer.
DANGER: Wood hulls and 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.
DANGER: If the boat is kept in saltwater it is recommended
that the transducer be coated with an anti-fouling paint. USE
ONLY WATER BASED ANTI-FOULING PAINT. DO
NOT USE KETONE BASED PAINTS. Ketone based anti-
fouling paint will attack the plastic materials used in the
transducer. See page 50 for recommendations.
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