Interphase Proble Operation Manual page 17

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
T1-0200-027 Thru-hull mount S/T
04-0009-008 30' S/T 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 30' 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 direct at (831)4 77-4944.
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.
transducer
7) Install and tighten the bronze hex nut (allow for swelling
in wooden hulls).
transducer
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 52.
17