Installing the Transducer 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 a non-cored fiberglass
hull, avoid over-tightening the nuts to prevent damaging the hull.
1
Apply marine sealant to the base of the transducer stem ,
anti-rotation bolt , and the sides of the transducer plate
that must contact the hull.
2
From outside the hull, insert the transducer through the
mounting hole and seat it firmly against the hull.
3
From inside the hull, apply the included anti-seize compound
to the exposed transducer stem and anti-rotation bolt.
4
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.
Do not over-tighten the hull nut.
5
From inside the hull, use slip-joint pliers or a crescent wrench
to secure the included M8 nut and 8 mm nylon washer
to the anti-rotation bolt.
Do not over-tighten the M8 nut.
6
Before the sealant hardens, remove all excess sealant on the
outside of the exterior hull to ensure smooth water flow over
the transducer.
Metal Boat Hull Installation Instructions
Thru-Hull Transducer in a Metal Hull with a Fairing
Block
If the deadrise angle of your mounting location exceeds 5°, you
should use a fairing block to mount the device.
Drilling the Transducer Stem Hole and the Anti-Rotation
Bolt Hole in a Metal Hull
You should follow these instructions when you are using a
fairing block to mount the transducer on a boat that has a metal
hull.
1
Select a mounting location without surface irregularities or
obstructions.
2
Using the template, mark the location of the stem hole and
anti-rotation bolt.
3
Drill a 3 mm (
1
/
8
in.) pilot hole through the hull at the stem
hole location, from outside the hole.
The hole must be perpendicular to the water surface.
4
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.
5
While holding a drill with a 13 mm (1/2 in.) bit plumb, drill the
anti-rotation bolt hole through the hull from outside the hull.
6
Sand and clean the area around the holes.
Applying Marine Sealant to a Thru-Hull Transducer
You must apply marine sealant to the transducer to ensure a
tight, waterproof seal between the fairing block and the hull. Do
not apply sealant directly to the stem or anti-rotation bolt.
Apply marine sealant around the base of the stem and
anti-rotation bolt on the transducer.
Installing the Transducer with a Fairing Block and Bushings
It is recommended that two installers complete these
instructions, with one positioned outside the boat and one inside
the boat.
1
Secure the bushings to the anti-rotation bolt and
transducer stem .
6
