Picked this tiller up with a 'locked engine'. It's a B&S 900 series, 122002-3783-B8. Took the recoil off and put a socket on the crank nut, rotated it backwards easily. Has had water in it somehow as the piston was stuck in the cylinder and the oil was milky. Got it rolling over good, but no compression. Pulled the valve cover and neither pushrod moves. So much for plastic geared camshafts! I'll put a HF Predator on it and sell it! It does have the fwd/rev tine setting.