I may give this a shot with the current transom-mount transducer.Hi Bull City - I'm just curious if you tried that test that I suggested in your original thread yet.
Epoxy? You could coat the transducer with mold release.
If I decide to try the Garmin in-hull transducer, I'll probably try it out with a plastic bag of water between it and the hull. If that works under power, I should be good to go. If not, screw it, I'll stick with what I have.Yes it seems like that should work acoustically. You could also set it in bilge water possibly.
Garmin should let you select the transducer. The EchoMap 4" comes with GT-20 transom-mount. I would have paid extra for the in-hull if that was an option. If the in-hull works, I'll have a $100 transom-mount for a door stop. It's stupid.