Any link on the web where I can find chainsaw specifications such as fuel mixture ratios? I have some older saws Stihl 015L, 031av, 041 farmboss) that I suspect may call for various mixture ratios. I have no manuals on them. What happens if you add a 50:1 mixture in an engine that calls for a 30:1 mixture. Could it cause problems when trying to adjust a rebuilt carb on my 031av? Adjusting this 031av rebuild carb continues to be a real challenge! :bang: