2
Apply marine sealant to the bushings, and at the base of the
anti-rotation bolt and transducer stem.
3
Seat the transducer housing firmly within the fairing block
recess.
4
Apply marine sealant to the side of the fairing block that must
contact the hull.
5
Apply marine sealant to the side of the backing block that
must contact the hull.
6
From outside the hull, insert the transducer cable and
transducer housing through the mounting hole.
7
From inside the hull, slide the backing block onto the
transducer and seat it firmly against the hull.
8
Apply the included anti-seize compound to the exposed
transducer stem and anti-rotation bolt.
9
From inside the hull, use slip-joint pliers to secure the
backing block to the transducer stem with the included
46 mm hull nut , the nylon washer , and the rubber
washer .
10
From inside the hull, use slip-joint pliers to secure the
backing block to the anti-rotation bolts with the included M8
nut and 8 mm washer .
11
Before the sealant hardens, remove all excess sealant on the
outside of the fairing block and exterior hull to ensure smooth
water flow over the transducer.
Thru-Hull Transducer in a Metal Hull without a Fairing
Block
If the deadrise angle of your mounting location does not exceed
5 degrees, you can mount the device without a fairing block.
Drilling the Transducer Stem and Anti-Rotation Bolt Holes
You should follow these instructions if you are mounting your
transducer on a metal hull boat and you are not using a fairing
block.
1
Trim the included transducer template.
2
Select a mounting location without surface irregularities or
obstructions.
3
Using the template, mark the location of the stem hole and
anti-rotation bolt.
4
Drill a 3 mm (
1
/
8
in.) pilot hole through the hull at the stem
hole location, from outside the hull.
5
Using a 38 mm (1
1
/
2
in.) hole saw, cut the stem hole from
outside the hull.
The hole must be perpendicular to the water surface.
6
While holding a drill with a 12 mm (
1
/
2
in.) bit plumb, drill the
anti-rotation bolt hole from outside the hull.
The holes must be perpendicular to the water surface.
7
Remove the template from the mounting location.
8
Sand and clean the area around the holes with a solvent
wash to remove dust particles.
Installing the Transducer in a Metal Hull without a Fairing
Block
It is recommended that two installers complete these
instructions, with one positioned outside the boat and one inside
the boat.
NOTE:
When installing a transducer in an aluminum or steel
hull, you must use the included isolation plate.
1
Secure the bushings to the anti-rotation bolt and
transducer stem .
2
Seat the isolation plate firmly against the transducer.
3
Apply marine sealant to the base of the transducer stem and
anti-rotation bolt, and the side of the isolation plate that must
contact the hull.
NOTE:
Apply enough marine sealant on all surfaces to
ensure bonding between the plate and the hull, including a
tight perimeter seal.
4
From outside the hull, insert the transducer through the
mounting hole and seat it firmly against the hull.
5
From inside the hull, apply the included anti-seize compound
to the exposed transducer stem and anti-rotation bolts.
6
From inside the hull, use slip-joint pliers or a crescent wrench
to secure the included 46 mm hull nut , nylon washer ,
and rubber washer to the transducer stem.
7
From inside the hull, use slip-joint pliers to secure the
included M8 nut and 8 mm nylon washer to the anti-
rotation bolt.
7
