I have a 96 mxz 583 that I recently bought. This is the problem. When I try to start it, I prime it until I see gas go the carbs, but it easily floods. After getting it started, it runs fine. As soon as I shut it off, it won't start again. I've even tried shutting it off and immediately trying to start it again and no luck. I have to remove the spark plugs, pull the cord ten or so times, put different plugs back in and it will then start. I don't use new plugs everytime either. They're usually the plugs I have removed the previous time. I thought I heard someone say once that the plugs may have to be gapped differently, but I'm not sure. Any help would be much appreciated. Thanks.