Man, I am so happy I found this thread. I have the same issue. But unforunately its totally randomn, tried to start it yesterday morning and it was dead. wouldn't start from kick, or push. Then got home last night and tried and it started fine.
Just had the carb cleaned and spark plugs replaced, so I am not sure about that being the issued, but then again, i don't think i could trust the ppl that did it. But will run through all the steps this weekend to make sure. Thanks for the info.

Does tempreture affect starting at all? We are in winter here so the mornings are around 4 or 5 degrees. Would that affect it?