We recently got the boat out of the garage since summer baseball is finally over (brother plays little league). We were all set to go out yesterday and spend the entire day on the lake but the boat would'nt start. It will turn over but will never even begin to come to life. We found that it wasn't getting a spark. We replaced the coil and still no spark. What the heck could it be? All of the plugs are in fine shape. Please help. It is a 140HP Mercruiser engine.