Actually these engines were all rejected from Toro. They all have somthing wrong with them. The first 20 I bought all had "Low Rpm" writtten on them in red greese pencil. Well by the time I got done with them that wasn't a problem The ones I have now all have somthing wrong with them too. Some have stripped screw holes on the plastic parts. A dumb reason to scrap a whole engie. Others say bad carb or somthing else. None have any problems with the engine itself. Look for red greese pencil on them. Somwere there will be somthing writen or circled.