I have a MTD Yardman snowblower with the Powermore engine(357cc). Everything works OK except that it hunts or surges until it is warmed up. When I start it and slowly take the choke off and go to run postion it will quit if I do not turn it back one notch, Then when I can leave it in run postion it will surge until I give up waiting and start using it. The surging will soon go away and run good. Is this a problem with Powermore engine or do you think it is the carb. I have cleaned the carb.Thanks
Blair