I did as suggested ( align the cut-out on the disk with the 3 fuel holes (tiny!) and the carb idles down nicely... With the brand new Brillelli 26cc after 320z of gas thru it, it idles at 2300-2400. top RPM is about 7700-7900 RPM. BUT there is a significant miss present at all speeds. I have a optical kill switch in the circuit and the light blinks with every miss. I tried adjusting high and low speed screws per walbro instructions ( run 2 minutes untill warmed up, take up to top speed and adjust hi speed screw for top rpm, then cut throttle slowly untill it "4 strokes" and adjust low speed untill 4 stoke goes away then repeat slower and slower. No real difference. I understand missing can be a voltage thing, so I'm going to a) swap my batteries around to put my 5 cell in ignition, 4 cell for servos, if no result b) take kill switch out of circuit, c) buy a new race prepped big bore walbro off ebay?
My gas is fresh 89 octane and the oil is fresh mixed 40:1 per Brillelli.
THANKS for previous and (hopefully) future help.
Mike