My old murray riding lawn mower, only starts when it feels like it. I can start it immediately one day, which I did yesterday, and today it won't turn over. It has done this many times, I am not able to take it in for repair as I live too far out of town, and our 2 handymen have left for greener pastures. So any help would be very appreciated. Please keep it simple, because I am not too bright.