If it started and ran well already this season, then it is probably some blockage in the carb. Does it have gas? If you prime it and it starts and dies, it is most likely the carb or float. You have to take the carb off disassemble and clean it out. It is either some debris in the main jet or a stuck float valve. Clean things up with carb cleaner and put it all back together. Should operate fine them. Good luck.