Garmin GT52HW-TM, GT22HW-TM Installation Instructions

Garmin ClearVü

Transducer Transom/

Trolling Motor Mount

Installation Instructions

Important Safety Information

WARNING

See the Important Safety and Product Information guide in the
chartplotter or fishfinder product box for product warnings and
other important information.

You are responsible for the safe and prudent operation of your
vessel. Sonar is a tool that enhances your awareness of the
water beneath your boat. It does not relieve you of the
responsibility of observing the water around your boat as you
navigate.

CAUTION

Failure to install and maintain this equipment in accordance with
these instructions could result in damage or injury.

Always wear safety goggles, ear protection, and a dust mask
when drilling, cutting, or sanding.

NOTICE

When drilling or cutting, always check what is on the opposite
side of the surface.

This equipment should be installed by a qualified marine
installer.

To obtain the best performance and to avoid damage to your
boat, you must install the Garmin® device according to these
instructions.

Read all installation instructions before proceeding with the
installation. If you experience difficulty during the installation,
contact Garmin Product Support.

Tools Needed

• Drill and drill bits

• Number 2 Phillips screwdriver

• Masking tape

• Marine sealant

Preparing the Transducer for Long-Term Exposure to Water

NOTICE

Do not use acetone or acetone-based products on the
transducer. Acetone damages the plastic transducer housing.

When you install a transducer on a boat that spends a
significant amount of time in the water, you should coat the
transducer and mounting hardware with a water-based anti­fouling paint to prevent marine growth.

Lightly sand the transducer and mounting hardware with a

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fine-grit abrasive pad.
Wipe the transducer and mounting hardware with isopropyl

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alcohol.
Apply water-based anti-fouling paint to the transducer and

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mounting hardware.

Mounting Consideration

To ensure peak performance with the lowest noise and
interference, you should route the transducer cable away from
ignition wires, house batteries and wires, trolling motor batteries
and wires, and high-energy wires such as radar, audio amplifier,
and autopilot pump wires.

Installing the Transducer on a Transom

Mounting Location Considerations

• The transducer should be mounted parallel to the water line.

• The transducer should be mounted as close to the center of
the boat as possible.

• If your propeller moves clockwise when the boat moves, the
transducer should be mounted on the starboard side.

• If your propeller moves counter-clockwise when the boat
moves, the transducer should be mounted on the port side.

• The transducer should not be mounted behind strakes, struts,
fittings, water intake or discharge ports, or anything that
creates air bubbles or causes the water to become turbulent.

The transducer must be in clean (non-turbulent) water for
optimal performance.

• The transducer should not be mounted in a location where it
might be jarred when launching, hauling, or storing.

• On single-drive boats, the transducer must not be mounted in
the path of the propeller.

The transducer can cause cavitation that can degrade the
performance of the boat and damage the propeller.

• On boats with outboard or inboard/outboard motors, the
transducer should be mounted at least 38 cm (15 in.) from
the propeller.

• On twin-drive boats, the transducer should be mounted
between the drives, if possible.

Assembling the Transducer with a Transom Mount Bracket

Attach the mount À to the transducer Á with the included

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star washers Â, and screws Ã.

Attach the mount to the bracket Ä with the bolt Å, rubber

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washer Æ, flat washer Ç, and lock nut È.
NOTE: The bolt should be tight enough to hold the

transducer in place when the boat moves at high speed, but
loose enough to allow the transducer to pivot out of the way if
the transducer hits an obstruction.

February 2017

Printed in Taiwan 190-02116-02_0A

Installing the Transom-Mount Hardware

NOTICE

If you are mounting the bracket on fiberglass with screws, it is
recommended to use a countersink bit to drill a clearance
counterbore through only the top gel-coat layer. This will help to
avoid cracking in the gel-coat layer when the screws are
tightened.

The cables connected to the transducer should not be cut,
because cutting the transducer cables voids your warranty.

Cut out the template.

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With the template À aligned vertically on the transom at the

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installation location (Mounting Consideration, page 1), place
the bottom corner Á of the template on the edge of the
transom.

If you marked a pilot hole in step 7, choose the appropriate

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drill bit to drill a pass-through hole completely through the
transom:

• If you have the 4-pin cable, use a 16 mm (5/8 in.) drill bit.

• If you have the 8-pin cable, use a 25 mm (1 in.) drill bit.
Route the transducer cable to the sounder:

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• If you are routing the cable using a pass-through hole,

push it through the pass-through hole, and install the
cable-entry cover (Installing the Cable-Entry Cover,

page 2).

• If you are not routing the cable using a pass-through hole,

route the cable up and over the top of the transom.

You should avoid routing the cable close to electrical wires or
other sources of electrical interference.

Installing the Cable-Entry Cover

If you routed the cable through the transom after you installed
the transducer, you should install the cable-entry cover to keep
water from entering your boat.

Place the cable-entry cover À over the hole and the cable,

1

with the opening pointing downward, and mark the location of
the two pilot holes.

Mark the center location of the two holes of the template.

3

Remove the template from the transom.

4

Wrap a piece of tape around a 4 mm (5/32 in.) bit at 18 mm

5

(7/10 in.) from the point of the bit, to avoid drilling the pilot
holes too deep.

If you are installing the bracket on fiberglass, place a piece of

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tape over the pilot-hole location to reduce cracking of the gel
coat.

Using the 4 mm (5/32 in.) bit, drill the pilot holes approximately

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18 mm (7/10 in.) deep at the marked locations.
Apply marine sealant to the included 20 mm screws, and

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attach the transducer assembly to the transom.
Route the cable under the transom mount cable hook.

9

If you must route the cable through the transom, choose a

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pilot-hole location well above the waterline and mark it.
Place a cable clamp on the transducer cable, approximately

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halfway between the transducer and the top of the transom or
the pass-through pilot hole.

Mark the pilot-hole location for the cable clamp, and using a

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3.2 mm (1/8 in.) bit, drill a pilot hole approximately 10 mm
(3/8 in.) deep.

Apply marine sealant to the included 12 mm screw, and

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attach the cable clamp to the transom.

Remove the cable-entry cover, and, using a 3.2 mm (1/8 in.)

2

bit, drill the pilot holes approximately 10 mm (3/8 in.) deep.
Fill the pass-through hole with marine sealant so it covers the

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cable completely and there is excess sealant around the hole
and the cable.

Place the cable-entry cover over the hole and the cable, with

4

the opening pointing downward.
Apply marine sealant to the included 12 mm M4 screws, and

5

attach the cable-entry cover to the transom.
Wipe away all excess marine sealant.

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Testing the Installation

NOTICE

You should check your boat for leaks before you leave it in the
water for an extended period of time.

Because water is necessary to carry the sonar signal, the
transducer must be in the water to work properly. You cannot
get a depth or distance reading when out of the water. When
you place your boat in the water, check for leaks around any
screw holes that were added below the water line.

Testing the Transom-Mount Transducer Installation

NOTICE

When adjusting the depth of the transducer, make the
adjustments in small increments. Placing the transducer too
deep can adversely affect the performance of the boat and put
the transducer at risk of striking underwater objects.

Test the transom-mount transducer installation in open water
free of obstacles. Pay attention to your surroundings as you test
the transducer.

With the boat in the water, turn on the chartplotter.

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