How did you get a 1/2 cup of fuel in the carb? Dump it? This a method for testing go/no-go for the engine fireing up. It ends there; you cannot assess engine performance without a pressurized fuel source on an engine designed to use a pressurized fuel source.

I quit tech advice because of my general poor additude--unlike the kind, compassionate persons who always show the utmost respect, I'm pretty nasty with a super chitty additude. Even so, it's obvious that someone has to give some technical advice, or this board is going to degrade lower than its present status. I also would like to say it's fasinating that with all the alledged expertise around here, that there could be some ground zero instruction. Even more fasinating is that the need for ground zero informtion isn't recognized. Then again, in my professional experaince with watching others troubleshoot, the lack therof doesn's surprize me.

Anyway, if you haven't done so--and something tells me you haven't--you need to check the volume of fuel coming out of the end of the fuel line, the end that attaches to the carb.

Only one question because anything more will be waste of my time:

Have you verified the fuel flow coming out of the gas line?

This is a yes or no. The way you answer has a lot of bearing on the next step.