Originally Posted by TexasDav
I had the same exact problem with my motor when I was first breaking it in. I was so frustrated. I had spark, fuel but I would peddle for blocks untill I just could not peddle no more, tried every trick I knew including sarting fluid. Called the pople I bought the motor from, They said change the plug, I said it has spark because I pull it and seen blue spark, and I tryed new plugs but I got the one they recomeded NGK B6HS, and it finally started. Took it awhile to run good but it was a weak spark. I don't know if that is your problem but a plug is cheap. Good luck.
i changed the plug to a NGK B7HS (it is all i could get) no difference