I have 2 old transducers that need to be removed, in the bottom of my boat so i can install a new one. the are glue with something down to the fiberglass in the back there a pain to get to but I don't have room for anymore with all the pumps back there to.

Is there anything the will release the glue or opoxy thats holding them down, or do I just get the hammer and chisel and bust them up and out?