I have a gt 5600 craftsman garden tractor. I had to put it on the charger the other day and it started right up. I turned it off to disconnect the charger and went to start it again and I only get a click in the ignition relay. Has anyone experienced this before? Also, the flywheel will not spin freely by hand. Possible motor seize? The tractor is only 4 years old and has had all general maintenance done in a timely manner. Any ideas/suggestions would be greatly appreciated. Thanks!!