But you know......Im running the same brand of fuel that I was last year. And my Irvine .53 runs awsome 95% of the time but just about 5% of the time it does the same thing that my YS does and thats just quit or bog. Actually the Irvine just stops but the YS loses power.

A few months ago I ran a another brand of fuel in my Irvine and it never quit on me even once. And I dont recall having to tweak the needle every 3 flights either. The fuel Im gonna try now will be the same for both the YS and Irvine so if it works out it will save me having to carry mutiple gallons with me to fly both.