Thanks for the replies... the plug looks black/really dark grey when I take it out. It dosen't look too bad, but of course the ped won't run. Change the plug, and wamm, it runs.
The air flow seems ok, I even took out the airfilter to try to lean it out a bit. I've got the carb adjusted as lean as I can and still have it idle. I'll try adjusting the float so the fuel level is a little lower. Other than changing the main jet is there any other ideas to lean it out a little? Also, the ped is 20 yrs old, but has only 1200mi, would the main jet be worn with these low miles? Or is this why pa50's were never big sellers?
Thanks again
Rob