I have just recently rebuilt a 1979 Ranger Bass Boat that has a 1977 115 Johnson. Every time I replace the fuse on the top left side of the motor just beside the starter it will blow. It is a small inline fuse I think 32V 20AMP. It was running fine then all of the sudden it started this. Can anyone help in solving this issue I am new to the outboard motor world and really frustrated.