I got a compression tester and it read 125. I have not adjusted valves yet. I read on B&S website that they don't publish compression PSI, that they prefer a leak down test. Does this 125psi sound correct? The flywheel is turning and I wouldn't think that it would turn if the key snapped off or fell out, would it?
125 psi is high, so check the valve clearances to start with. The engine will crank with a sheared flywheel key but will not fire at the correct time.