[newz7151]

As bugman said, it most likely is a carb adjustment.... I would try that first before doing a rebuild. It could be a stuck needle but since you said it idles fine I doubt that is what it is. BTW, Ryobi style engines are now made by MTD and the engine design hasn't changed much from the model you own.

Actually Hank, last I saw, I thought the Ryobi units were now being made by Homelite? At least that is where the Ryobi service site directs for new units.