I have a brand new exmark turf tracer hydro 17hp kawasaki engine with about 10hrs of use. After using the wb for about 4hrs it shuts down and won't start back up? It will take a couple of days before it will start again. Someone had mentioned to me to check the oil to make sure there is not to much, but its ok, has anyone else had this problem, or any suggestions. It is going back to the dealer again, as the problem persists.