Garmin Colorado 400c Benutzerhandbuch - Seite 15

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Selecting a Location for a Shoot-Thru-Hull Installation

When installing a transducer, the installation location must be the

following:

• Solid fiberglass, without any air bubbles, laminates, fillers, or

dead air space.

• In an area of clean (non-turbulent) water at all speeds.

• The location must not be over any strakes or behind any

obstruction on the hull that would create turbulence.

NOtE: Many modern hulls have a dedicated pocket for

shoot-thru-hull transducer installation. If you are unsure if your

hull is equipped with a pre-located pocket, contact your hull

manufacturer.

To test the location:

1. Fabricate a test device from a section of PVC pipe or a can,

as shown in the following illustration.

2. Temporarily seal the test device to the hull with caulking or

RTV sealer, and fill with water or light mineral oil.

3. Place the transducer in the water, pointed directly at

the bottom and weight it down. Set the unit for optimum

performance. If the sonar performance is significantly

degraded, another location must be tested.

Fishfinder 400C Owner's Manual

PVC pipe

or a can

Strip caulk or

RTV sealer

Hull surface

Testing the Location

To permanently install the transducer:

1. Lightly sand the surface of the hull and face of the transducer

with 400 grit wet or dry sandpaper.

2. Build a dam using strip caulk about 1/4" (6 mm) tall. Pour

about 1/8" (3 mm) of two-part, slow-cure epoxy into the dam.

3. Place the transducer in the epoxy, turning the transducer to

work out any air bubbles.

4. Weight the transducer in place, and allow it to cure for

24 hours.

400c

nstallIng the

IshFInder

Weight the transducer

to hold it in place.

Fill a pipe or can with

water or a light mineral oil.