Matt Coolen
ArboristSite Operative
Hey everyone....let me pick your brains! Just finished re-assembling an ms261. I got it with a bad crank, someone had straight gassed it, and new, uninstalled p/c of unknown (chinese) origin. So I found a good used crank, installed with new OEM seals, gaskets and OEM carb kit. After firing it up, and warming it to tune, following stihl shop manual, I have a seriously slow to rev saw. Not boggy, just really slow to wind up. Once it is about 1/3 full rpm it wakes up and goes. Took the carb back off, cleaned and blew out all orifices with compressed air and brake clean... still the same. What's next?