[chuckg]

I am replacing a faulty Depth sounder transducer on a Signet Marine 172 Depth sounder on my C&C 25. Or at least attempting to do so.. The previous installer has bonded the transducer through the hull and also through a 1/2" wood backing plate with 3M 5200 and it has resisted all attempts from hammers, chisels, and other inplements of destruction to even budge. I am not worried about damaging the old transducer as I have a new one to replace it however, I am worried that I might damage the hull either by using heat or by whacking it too hard with a hammer and delaminating the glass. Any suggestions?
Chuck Gilchrest