Summer and winter modes on chainsaws

It's so that it runs similar in the cold without touching the jets. Any woodsman is going to tune their jets every day they run the saw.

There is also the benefit of it preventing frost if you're cutting up wood in subzero, I guess.
 
I've never used that feature on my echo cs590. IIRC it said only use if considerably below freezing.. and I'm not cutting wood at 0f.
 
What would be the crossover point to where you need to change it... 32°F? I don't use mine in the summer because of the poison ivy. I mostly use mine when temps are in the 50s.
 
Sthil MS261
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