I just picked up a stihl 031 saw and it will start up and idle ok for the most part but will hardly rev. if i hold the throttle open it just smokes more and makes a louder bwaaaaa sound. sometimes it will catch and rev but stall out soon after ward. i checked the points and replaced the condenser, it has a hot blue spark and about 150 psi compression. it has fresh gas and i even opened up the carb and it looked clean inside and i couldn't see anything amiss. fuel filter isent clogged either. anyplace to get parts for this saw, i checked a couple of dealers and everything they tried to look up was discontinued. not what i expected from Stihl. man i wish my echo 8000 hadent crapped on me, i miss that saw.