I have a B2630 Tractor that I was using last Saturday and I stopped and killed the engine for a short while. When I climbed back on to crank it up, it would not start. I mean it made no effort. I can hear the click when I turn the key, but it does not turn over. This happened to me once about a year ago and I did the same as I did last time. I checked all the wiring and fuses, but unlike the last time when it just decided to crank out of the clear blue, nothing. Has this happened to anyone else? Help!