They are typically labeled L (low speed jet), H (high speed jet), and I (idler jet). Start by locating the three adjustment screws. However, if you have an older saw, here’s how to quickly tune it yourself.
If you have a new saw, this won’t apply to you, as new regulations require saws to be built so that only a qualified technician can tune the carburetor. I’ve run chainsaws for over 30 years and never knew to how adjust the carburetor. One such item was chainsaw maintenance, and one part of that was the carburetor test. In a recent blog I referenced the Game of Logging courses I attended and described all the new things I learned about safe and efficient use of a chainsaw.
