Hi, I have an x 300 with only 42 hours on it. Sometimes, a few times, it will shut down after mowing for an hour. Then it will start but run really rough. When I turn the mower key off, it runs really good for a second till it turns off. After leaving it for a half hour or so, it starts up and runs, but a little rough , I can finish what I have to do. I have had this trouble on other mowers. Is it related to oil levels, I have had a little too much at times? Or is it a coil issue. Or something else. Its so new I would think the coil would be ok. I am hesitant to take it in because they charge an arm and a leg. I am thinking about just putting a new coil on , it seems like it wouldn't be too difficult , but I have never done it before. It has a Kawasaki engine. Thanks for any help