Milton,
Thanks for the quick response. I checked the plug cap, and it was OK. I also tried the foil, but that did not work either. I was told that Spektrum does not work well with chokes...don't know if that is true or not. Anyway, it appears my last resort is to install a new ignition system. I checked your website, but don't know which to order for this engine...let me know and I will order it. If this does not work, I am going to replace the engine with a reliable Zenoah G-45. I have flown them for years without any such problems.
Again, thanks for your help.
Bob