Thanks for all the suggestions guys, I am going to try each one, step by step..
Yesterday, the engine was a bit better. I cut 2 inches of tubing between the tank and the muffler. The engine gave me a bit more spins before to quit.
They suggested putting a one way valve in the pressure line to keep tank pressure up. I've got to try that
David, i tough the one way valve works for liquid only? Are you saying the valve will keep the air pressure at the maximum in the tank? I like this idea but what valve part number are you talking about?
Try getting rid of the exhaust deflector
Good idea!
Daniel