Dave,

Took my plane with 120 SF out to fly yesterday and the engine would not run full throttle. Idles and mid range great but full open and it dies out. I can watch the fuel flow to the engine at idle and half but at full throttle the fuel with air bubbles reverse and head towards the tank. Took and cleaned out the check valve, installed correctly but no luck. The engine did sit up all winter (Oct - Jan) without running. I haven't checked the tank or lines yet. Any ideas?

Thanks,
Mike