I am getting ready to install a fish finder and need suggestions on mounting the transducer. I am going to mount it an the bracket that is already in place on the back of one of the pontoons. My problem is that I keep the boat in the water and can not drill the holes into the bracket underwater. I was thinking of mounting it with some marine grade 5200 or 4800 epoxy. Is it possible to do this underwater? Any recommendations? Thanks.