drz1050
Minister of Fire
The ethanol gasoline is garbage.
This is especially true on small engines/ small carbs... try to find an ethanol free gas station near you and fill up a couple jugs.
If you were running them at 30:1 and they were fine, go back to that.
Echo recommends 50:1 right now for their saws too... mine runs better with a little more oil in the mix.