Small Engine Troubleshooting Problems? Ask a Mechanic Now.
The engine may have failed and is now seized. Did the spark plug plug you removed , show any damage? Need to remove the cover ver the flywheel and use a wrench on the crankshaft nut, to see if engine will turn. Engine has to turn full circle, or has internal problem. Check the starter gear, to be sure it is not jammed into the flywheel, locking it.
Did yu find the problem?