Here is a quick video on how I like to adjust my high mixture setting screw on my Echo Weedeater line trimmer carburetor. This works for the low idle adjustment screw and the high rpm adjustment screw. This is a touchy procedure so make sure you do it properly or you can and will do damage to your machine. This procedure is pretty much identical to any 2 stroke / 2 cycle carburetor, like on a chainsaw or a leaf blower, weed whacker etc. Its the same sort of procedure on Stihl brand weed eater / chainsaw or Husqvarna etc. Some people say these carburetors are non adjustable, but I think they are wrong, watch this video and you will see. This adjustments were performed on a SRM 225 model trimmer but this method also works well on the PAS powerhead units as well.

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