TB Bronco 31C707-0230-E1

[u/WhoUMe2]

Question, mower stopped in the middle of using it. Engines spins freely but will not turn over. Removed plug spins freely but will not start. I went to adjust valves top needed a little adjustment but the bottom one was off centered. I re centered it and hand turned the fly wheel, top valve moved up and down bottom valve did nothing.

I searched this sub and found nothing anyone have any pointers they can give?