I run stihl handhelds with the the stihl ultra mix. One time I run out of the ultra mix and used the echo mix I had on the trailer and all my equipment started spitting and sputtering and hard to start. I'm not positive it was the mix but I will never use echo 2 cycle again. It's almost like it gummed my carbs up.
Last edited by CandyAces; 12-24-2012 at 01:34 PM.