Thread: remounting broken transducer on fiberglass boat

I had the small bracket on my humminbird transducer mount break today. This mount was already on the boat when i bought it, I know you are supposed to use a specific adhesive on the screw holes that go into the transom and hull, but i cant remember the name of it. Someone please refresh my memory.

Thanks yall

JB marine weld, marine Tex Gray color, or slightly drill out loose material from the hole and fill with 3M 5200, remembering it has a long set time and will flow out of the hole. There are options in the 5200 (silicone type stuff) that have faster cure time and more stability against running back out of where you put it. I put mine on with a piece of duct tape pulled away from the top a little that held it in place until it dried, mine was a couple of days until solid. Then trimmed flat with a NEW razor blade and drilled and applied even more of the stuff when I applied the sacrificial HDPE transom plate. Had to tape the bottom and sides of the plate until that stuff dried too. Never had an issue afterwards and no chance it was ever coming off of the boat. I used a 3/4” transom plate and found it as raw material online and cut and shaped my own fora perfect fit with a router and woodworking tools. Easy peasy.