Stihl Dealer full throttle on my new MS 391?

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OP stated Igor ran the saw wide open for 15 seconds, on a new saw that is normally set lean from the factory to meet air standards. I don't think it's all that much different. But like I said, to each their own.
I have not found Stihls saws to be set factory lean. Echo on the other hand.... :surprised3:
 
Any saw that can’t take 15 sec at WOT, no load, is not worth owing. Seriously, it’s just a chainsaw. They are pretty tough. It will be OK.
 

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