Help , I am looking for a fuse for my son's O'Day 240. It is from an inline fuse holder in the pos battery lead. Appears to be origional equipment, but who knows. The fuse is about 5/16" in dia about 2" long. This is an estimate from memory as the boat is in a slip 150 miles away and of course he didnt bring the fuse. Does anyone know where I can buy the fuse ? Any guess as to the current rating. It has no marking. thanks for any help, mpm