Join Date: Aug 2009
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well, I can't speak to your specific situation.. but there are two fairly common problems with depth finder installs:
problem a: the sending unit is installed over a void in the hull. Examples include centerboard trunk, cored hull, wire/pipe conduits, and zinc anodes
Problem b: The sending unit was installed using epoxy which had one or more air pockets/bubbles in the puddle, and said air pockets did not release.
There are dozens of other things that could be wrong. Heck, it might even just be as simple as the sending unit wasn't properly mounted. I've even seem them held in by brackets or screw-tabs. Have you set eyes on the unit to see how the install looks and where it is?
... or I'm wrong.
Living aboard, currently in the Chesapeake
O'Day 37, still new to us