In-Hull Installation

To avoid drilling a hole to mount a thru-hull transducer, a transom mount transducer may be used with epoxy inside a boat (also called “shoot- thru-hull” installation). For a transducer to be mounted inside the hull (shoot-thru, not thru-hull), the boat must be fiberglass, no core (contact your boat manufacturer if you are unsure). Test by placing a small amount of water inside the hull, placing the transducer on top of the water, then verifying the accuracy of the locators versus the current water depth. If they are the same, use epoxy (non-silicone based) to affix the transducer to the inside of the hull. If using a temperature sensing transducer, the temperature displayed will reflect the hull temperature.

Selecting a Location

The location has to be solid fiberglass, devoid of any air bubbles, laminates, fillers or dead air space. The location needs to be in an area of clean water at all speeds. Do not place the transducer over any strakes or behind any obstruction on the hull that would create turbulence.

Testing the Location

Place the transducer in the water, pointed directly at the bottom, and set the unit for optimum performance. Place the transducer in the test device as show on the side bar. If the sonar performance is significantly degraded, another location will need to be tested.

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Installation

Mounting the Transducer

Many modern hulls have a prelocated pocket for In-hull transducer installation. If you are unsure if your hull is equipped with a prelocated pocket, contact your hull manufacturer.

Weight transducer to hold it in place

PVC Pipe or a Can

Fill Pipe or Can with water or a light mineral oil

Strip Caulk or

RTV Sealer

Hull Surface

Testing the Location

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