fleck05 wrote:Source of the post
"Before it starts leaking, remove it, remove the wood backer plate, and have a fiberglass tech patch the hole properly"
This was a curiosity... when the wood rots through can it leak?
"It looks like there is a tightening nut on a threaded shaft there which shoot-thru-the-hull types don't have."
So maybe it won't leak if the wood rots?
If it was installed properly, then it's sealed from the outside. If the wood rots so much that there's no support on the inside, then eventually the transducer will loosen from the hull and you will have a leak. Given where that's mounted, I don't think it would normally see water from the bilge unless the water was pretty high, so I'm wondering if it's been leaking all along and that's what rotted the wood.
I'd look for another reason to use the hole for a transducer or a thru-hull water source before I'd patch it.