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Old 04-22-2008
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merttan merttan is offline
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If you have a hanging rudder, you can install it on the rudder... That's what I did on my 22 footer and it works fine. I secured the cable with simple one layer of fiberglass cloth... It's not the best solution but beats the drilling holes for me...

For installing inside the hull, you need to find the thinnest location that's solid fiberglass not cored and will be still somewhat parallel to the bottom when you heel... Then you can install support for the transducer by glueing small pieces of wood and cover them with fiber glass, then drill screw holes on that support to install the transducer...

Inside installations do work but not as accurate as installing the tansducer in the water... Any air bubbles that passes beneath the hull can interfere, as well as, the (God forbid) any blisters that may occur at the location...

Inside hull installations are recommended for power boats, which has thin fiberglass hulls and would be affected in performance by the transducer's shape...

I wonder if you could replace the old transducer you found with a new one without making additional alterations to the boat...?

I also thought of a rather unortodox method before, I'll share it if you are interested... If you have a inner rudder setup, you can install a pipe holder to hold a small pipe (or a wooden stick) close to the transom then install the transducer at the end of that pipe. When you want to use it just put the pipe in location, when you don't need to use it store the pipe and transducer in the boat... Does it make sense to you? I could send some drawings if you want...
Best of luck...
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