Purchased this self propelled push mower last year. It is a 159cc, 21 inch. Model # 247.377300. Started it yesterday to mow, and it was running way to fast. It has no throttle control, so I can't adjust it that way. Has fresh fuel, checked air filter, and don't know where to go from there. Sears says to drop it at a repair center. That is a whole lot of help. Any information on this model, and problem would be appreciated.:frown: