Have a new Stihl 261c-m with 18" Rollomatic E bar. Chain is 26 RM 74. .325 pitch .063 gauge. On the 3rd tank of fuel. Have yet to burn a tank of fuel without having the nose sprocket jam with fine shreds of wood fiber. This happens everytime I cut at any angle but 90 degrees to the grain. I cut firewood, standing dead green ash. I noodle some pieces that are too heavy to lift. I don't have this problem with Stihl 021 or 360. Our Dolmar 420 and Husky 350 are not a problem. Dealer confirmed saw is oiling and claims the sprockets are just tight. The sprocket will not move until driven with a drift and hammer then the wood fiber can be removed from behind the sprocket with a small sharpened ice pick. This take nearly an hour. Dealer also said warranty covers engine internals only. I searched and see that others have had this problem. Many fixes were offered. No one confirmed that some solution did actually work! I am thinking a different bar and chain might work. I have run 20NK with the NK bar with good luck. This saw cross cuts like an angry beaver! If I could just keep the nose sprocket turning.
Thanks
Tom
Thanks
Tom