HI, i AM HAVING A PROBLEM WITH THIS TRACTOR.  BATTERY IS CHARGED, BUT NOTHING HAPPENS WHEN I TURN THE KEY.  I HAD MY SON SIT ON THE TRACTOR, TURNED THE KEY ON AND USED A CAR JUMPER ON POSITIVE STARTER TERMINAL AND TOUCHED THE NEGATIVE TO THE FRAME.  IT STARTED RIGHT UP.  BAD KEY SWITCH OR ????