On your 250, ---- JUNK the carb that Sthil put on it and get a chimineese knockoff $10. new carb put it on, set it and go cut wood! Stihl dealers jacked my friend around for over a year on his 250 and it was carb defect right out of the box but they refused to accept that fact. He threw the saw under the bench where it laid for 10 years then handed it to me and said IF you can fix this damn thing to run , its yours! Well new fuel line from stihl and new carb from chinma and we been cuttin for 5 years now with no starting trouble!
I do NOT endorse chimna junk BUT in this case it was the majic cure to a sthil factory problem, PLUS when I took the old carb off, On top side was stamped STIHL,--- turned it quarter turn it is stamped ZAMA, o.k. one more quarter turn and CHINA!!!!!!!!!! LOL! So I figure why not get another one from them that does NOT say ZAMA or STIHL on it!
The new carb can be set with common screwdriver and it runs better now than a new saw, NOT a bit hard to start now, usually a couple pulls and your cuttin wood---cold or hot it just starts and cuts!
I do NOT endorse chimna junk BUT in this case it was the majic cure to a sthil factory problem, PLUS when I took the old carb off, On top side was stamped STIHL,--- turned it quarter turn it is stamped ZAMA, o.k. one more quarter turn and CHINA!!!!!!!!!! LOL! So I figure why not get another one from them that does NOT say ZAMA or STIHL on it!
The new carb can be set with common screwdriver and it runs better now than a new saw, NOT a bit hard to start now, usually a couple pulls and your cuttin wood---cold or hot it just starts and cuts!