Since none of the experts have answered yet, I'll throw out a few ideas, just remember mines not on the road yet so I don't have a lot of sei knowledge. Things to think about:
Was the choke on all the time it was running? Could you have fouled the plugs?
Stale fuel? Not sure what that would do but will find out soon.
Breakers sparking? Are you checking for spark at the spark plug or do you mean sparking across the points (breakers)themself? If you have sparking across the breaker points then it means your condenser is faulty. If you want to check for spark at the cylinder, pull your sparkplug or put a timing light on that lead.
Let me know where you're at and might think of something else.