Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! With engine off and blade not engaged, can you turn the drive pulley for the blade and it turns freely and is not locked up? If not a blade problem, I would suspect the needle valve is not letting enough fuel into the bowl . Check the fuel passage through the needle valve seat. The rubber seat can swell and restrict the fuel flow.
Did you find problem with fuel?