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Transducer fitting for depthfinder
hi, I was reading the thread on cutting a larger thru hull hole for a fitting which brought up a guestion I have. Do I need the backing plate for support of my depthfinder thru hull fitting? I drilled the hole from the outside as my hole saw attachment for my dril wasn't strong enough and wobbly tocut through the acking plate first. Cutting through the hull the plate popped off. The hole was the correct size but ragged. Trying to reattach it meant cutting the subfloor to fit both the plate and large plastic wingnut through the floor. I sadler the fitting with 3M 4200 sealant and tightened the wingnut to the hull. It is a wide(3 inch edge) fitting. I plan to launch my C&C 24 and test it as I have to test my meters as new power and transducer cable were installed for both depthfinder and knotmeter. Will it HD or should I reinstall with backing plate? Thanks,ahab211