I may have the opportunity to get an Echo Trimmer engine for about $25.00. I think these are the 21cc size. Has anyone converted one of these engines? I have been told that they turn a higher RPM than the Homelite 25cc. I think they are supposed to be more of a commercial engine. Does anyone know how they would compare to a Homelite 25cc. It looks like the carbs are mounted in such a way the the trottle control would be a straight shot back. Any help is appreciated. Thanks

Paul