Did some reading at
http://www.dansmc.com/starter.htm. I couldn't quite tell if the carb uses an enriching circuit or a float plunger. It looks to me like an enriching circuit.
I full opened the throttle and did two kicks to clean it out, then I held the plunger all the way out and kicked without any throttle. Still no dice.
I tried holding the plunger for a few seconds, releasing it, opening the throttle by 1/4-ish, and kicking - no luck that way either.
Thoughts?