Most recently after the installation of the new carb it seemed to making good power on the ground and running well, as soon as it got into the air it started to sag at full power, I pulled the throttle back to 1/4 just enough to get around the pattern and land. We reset the needles and took the velocity stack off. Same thing. Recently I have put on a whole new fuel system, tank , hoses and fittings trying to solve the problem.
At wits end in fla
A3