Ran fine for a year or so. Seems it may have started when this cold spell started. It runs great with the choke on half way. As soon as i take the choke off, it bogs. No smoke though. I cleaned the air filter and changed the plug. I pulled the carb and found no dirt. Im assuming the high speed jet may need an adjustment due to the cold. The bogging is a symptom of it running rich but theres no smoke at all. As soon as i choke it, its revs back up.