How to Glue a Depth Transducer to a Hull

Depth and fish finders use a sonar emitting transducer.

A transducer is used with depth or fish finders. The transducer emits sonar waves in the water under and around the boat, receiving the waves back after they bounce off the water bottom or underwater objects. Glue is among the methods of installing the transducer to the boat hull. Benefits to gluing the transducer to the hull include no holes drilled into the boat to mount the unit.

Things You'll Need

• Warm soapy water and sponge
• Marine epoxy
• Fine sandpaper
• Silicone caulk and caulk gun

Instructions

1. Scrub down the area along the hull where the transducer will mount, using soap and water. Find a spot at least one-third the boat length away from the engine and propellers to avoid water cavitation and disturbances that affect the transducer. Cavitation is the effects of the prop and engine on the water that creates bubbles and disruptions that effect the sonar abilities of the transducer. Let the hull dry.

2. Sand the area of the hull with fine sandpaper to make the surface more porous and ready for the epoxy. Sand the back of the transducer as well, for the same purpose.

3. Consult your transducer's directions to see the recommended angle you should place it in regards to the boat hull. Most transducers require a 10-degree minimum from the hull.

4. Apply the marine epoxy to the hull and back of the transducer. Cover the entire back and area on the hull. Stick the transducer to the hull and let the epoxy dry.

5. Add a seam of caulk around the edges of the transducer as an added attachment epoxy.

References

• Fish Finder Store: Transducer Information
• Depth Fishfinders