When it's warm and you throttle it up above idle it acts like it's loading up and dies. I put maybe 20 or so flights on it without a problem. I'm going to put a kit in the carb tomorrow to se if that makes a difference. My next step will be the plug. After that I guess I may need to check the date on my ignition as tkg suggested. After that I'll be totally lost! Hopefully one of the above may straighten it out.