I was out on the lake today and suddenly my trolling motor kept blowing the 40 amp in line buss fuse. When I would replace the fuse, the trolling motor would run until the head was about a foot under water, then the fuse would blow again. Anybody have any idea what could be causing this? When I got back home to charge my batteries I noticed the wingnut which connects the trolling motor to the battery was very loose and not tight at all. Could this have beencausing the fuses to blow? I cant really tell if that was the problem until I put the boat back in the water. I hate to plan a fishing trip and think the thing is fixed and the first time I put my trolling motor in the water it starts blowing fuses again. Any suggestion?