CONTINUOUSWAVE

Thank you all for the detailed responses. I think I will go with the wood plug method sealed in with epoxy. I will update when I do it.

There are old transducer mounting holes below the water line in the transom of my 1970 NAUSET 16. When I removed the screws from these holes, brown water dripped out. I left [the boat out of the water] to dry for a couple weeks. Then tried to fill the holes with 3M5200. The 3M5200 never cured hard i...