It won't idle correctly. When I pull the glow ignitor from the plug, the engine immediately dies. After replacing the plug and putzing with the idle adjustment, we got it to run at about 1/3 throttle without dying after pulling off the glow ignitor. But whenI throttle down to idle, it dies. I had 4 guys from the club helping with the idle adustment and we couldn't get it to work. It runs fine on the high speed.I did notice some air bubbles in the fuel line between the remote needle and the carb. So I've pulled the tank and replaced the tubing. I'm not sure what to do next now.

What doesn't make any sense is the engine has been running just fine since January. Then suddenly Ican't get it to run reliably at all. I'm about ready to just buy a different engine.