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I've been having the same problems, with my transducer. It was originally installed, by the Kayak store, with a piece of foam, as the cup, and then vaseline was used inside the cup. It works o.k., until you turn the kayak upside down, then you have vaseline all over the place.
Next try, was with the goop, and then silicone. Both worked for a while, but then I would only get a 0.5 reading. Either, there were bubbles formed, or an adhesion problem.
My last attempt, was the wet well. I used silicone to mount the pvc fitting. It worked great for a few trips, and then stopped. The silicone did not seal well enough, and the water leaked out.
I have to re-do. I am thinking about, going back to the foam cup, and using a 2 part clear epoxy.
Has anyone used the epoxy method?
Bill
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