Just picked up a boat with an Eagle SeaFinder 480 DF fishfinder. It powers on but seems to be stuck in the "practice" mode. I've traced the leads back to the transducer and noticed both leads,(transducer and speed) have the insulation melted from apparent contact with the i/o engine. However, the wires inside do not seem to be broked. If I have to get another transducer for it, well, I just might as well upgrade to a newer unit. Any thoughts????? Thanks, Jim