5
Installing
CAUTION
: Do not over-tighten the nuts possibly damaging the
transducer or fairing.
1. From outside the hull, thread the cable through the mounting
hole (Figure 4, 5, 6, or 7).
2. Push the stem of the transducer and the anti-rotation studs
through the hull.
3. From inside the hull:
•
Fairing
—Slide the backing block and the hull nut onto the
cable. Seat the backing block firmly against the hull. Screw
the hull nut in place and tighten it with slip-joint pliers.
Do not
over-tighten
. With the bedded side down, slide one washer
and nut onto each anti-rotation stud. Tighten the nuts
one full
turn only
with slip-joint pliers.
Do not over-tighten
.
Cored fiberglass hull
—
Do not
over-tighten crushing the hull.
Wood hull
—Allow for the wood to swell before tightening.
Metal hull
—Be sure the isolation sleeves are between the
transducer stem/studs and the hull.
The isolation sleeves
must be below the nuts to prevent the sleeves from interfering
with tightening the nuts.
Trim the sleeves if necessary.
•
NO fairing
—Slide the rubbery washer and hull nut onto the
cable. Seat the rubbery washer firmly against the hull.
Screw the hull nut in place and tighten it with slip-joint
pliers.
Do not over-tighten
. Slide the rubbery washer, metal
washer, and nut onto each anti-rotation stud. Seat the
rubbery washer firmly against the hull. Tighten the nuts
one
full turn only
with slip-joint pliers.
Do not over-tighten
.
Cored fiberglass hull
—
Do not
over-tighten crushing the hull.
Wood hull
—Allow for the wood to swell before tightening.
Metal hull
—Be sure the isolation sleeves are between the
transducer stem/studs and the hull.
The isolation sleeves
must be below the nuts to prevent the sleeves from
interfering with tightening the nuts.
Trim the sleeves if
necessary.
4.
Fairing
—When the boat is underway, especially at high
speeds, water will enter any gaps and push against the fairing
with considerable force, possibly rotating it. Fill any gaps
between the fairing and the hull with marine sealant.
If there is
any gap greater than 1.5mm (1/16"), replace the fairing.
5. Remove any excess marine sealant on the outside of the hull,
transducer, and fairing if used to ensure smooth water flow
under the transducer.
Figure 6. Bedding and installing WITHOUT a fairing in a fiberglass or wood hull
Copyright © 2022 Airmar Technology Corp.
anti-rotation
transducer
nut (2) &
metal washer (2)
stud (2)
hull
rubbery
washer (2)
hull nut
stem
cable
rubbery
washer
marine sealant on transducer
and anti-rotation stud (2)
Figure 7. Bedding and installing WITHOUT a fairing in a metal hull
Copyright © 2022 Airmar Technology Corp.
isolation
sleeve (3)
hull nut
stem
anti-rotation
cable
nut (2) &
metal washer (2)
stud (2)
hull
rubbery
washer (2)
rubbery
washer
detail
isolation sleeve
and rubbery washer
must be used in
a metal hull
marine
sealant
transducer
anti-rotation stud with
marine sealant on transducer,
anti-rotation stud (2), and isolation sleeve (3)
isolation sleeve