efish,

Are you running a filter on your gas line? if not, you may want to check the screen on the side of the carb. It doesn't take a whole lot to clog it up. I had a 26cc SPE and I couldn't get mine started and it ended up being the Hall Sensor flew out and was stuck to the case. Since your getting a spark your Hall Sensor must still be in place but check to see if it has come loose or moved. My little 26cc SPC was real prone to flooding and it would not start by flipping but with a start it would end up starting but it took a while. I'd always have to pull the plug and let it dry out.