RE: DL-50 engine
I was using stihl ultra at a ratio of 32:1. I started with the low needle... I leaned it until I lost transition, then richened so transition came back. high needle leaned until max RPM was achieved then backed off 200 RPM. This engine ran great the whole time no dead sticks or anything. it was a little hard to start 2nd and 3rd flights, so maybe my low needle was lean right? I think I am ready to move to a ratio 50:1.
let me know what you think
josh