Hope someone can give me an idea. I was using my battery to jump start another boat when another person started up my motor. The motor ran for a couple of minutes and before I could shut it off it died. No more spark! A couple days later when I went to work on it the motor started right up. Took the boat out and it ran great for a an hour or so. when I was going back to the launch and went down to idle it went dead again.
