Originally Posted by HickamHatch
I think it only has a high speed needle.
I thought so because the RTR typically on have high speed adjustment only. Just do the high speed at 2.5 turns. Hopefully that will get you started at least. After that adjust accordingly either richer (CCW) or leaner (CW). Make your adjustments in small increments equal to 1hr on a clock. Also be sure to have a fresh plug that is the proper heat rating and length. I think it takes an O.S. #8 plug. Not sure. Is it the .18 size engine?