Hope you guys can help me out with this. I bought the 555 about 3 weeks ago and used it last week and today .
I have 2 tanks thru it and running 50:1 sunoco 100 lead free fuel with stihl ultra oil. The saw runs great but after it gets warmed up and go to give it gas off idle it stumbles and the revs up fine . I will take it back to the dealer to have them look at it but i wanted to ask hear first. I think i calibrated it correctly for what the book says to do. It doesnt stumble when cold just hot and the air filter is clean . thanks .:msp_unsure:
I have 2 tanks thru it and running 50:1 sunoco 100 lead free fuel with stihl ultra oil. The saw runs great but after it gets warmed up and go to give it gas off idle it stumbles and the revs up fine . I will take it back to the dealer to have them look at it but i wanted to ask hear first. I think i calibrated it correctly for what the book says to do. It doesnt stumble when cold just hot and the air filter is clean . thanks .:msp_unsure: