Interesting Twin Star. I did not mention that I had one of those aftermarket velocity stacks on the engine and that the stack is facing forward. From the site you listed, that is wrong and could lead to running problems. The website states the stack will pressurize the atmosphere side and cut off the fuel. Which may explain what I have been seeing. I will turn that thing around before the next time.

If anyone has any comments on this let me know.

Thanks
JIm