Simplicity lawn tractor #1686814 with 40 inch deck. Stopped running while operating, would not re-start. Belts fine and deck fine. Oil levels fine. Determined battery low, fully recharged but wouldn't hold charge over night. New battery installed, would not turn over. Started using my car battery, ran ok. Confirmed that new battery was good-still will not turn over. Get click or whining sound. Did overfill gas tank prior to mowing.
Any suggestions on the next move?