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How to test in-hull transducer before installing?
GENE (re the quote below)
1. probably a dumb question but what is "RTV?"
2. Do you cover the whole bottom part of the transducer that sits on the hull with vaseline/epoxy/RTV, not just the edges of the transducer?
"..then clean all the vaseline off with alcohol and glue it in place. I have used epoxy but I prefer simple RTV, put a blob in the center of the puck and make sure there are no bubbles in it, then push it down on the spot so that the RTV pushes out on all sides..."