Went to the lake after running my motor with muffs to tune it up and adjust the carbs. Had it running great and when I launched it started fine and ran fine. I shut it off for a few minutes to fill the inner tube and when I started it up to run across the lake it suddenly shut off and wouldn't start back up. It just cranked like the kill switched was flipped. When I got back home I put the muffs back on and after a couple of trys it started up and ran fine again. What is going on here?