[Tongue Pirate]

Did you purchase the engine/carb new? Was it set up by someone? Do you know if it ever ran correctly? The reason I ask is because it may be something like a worn ACC. Pump or diaphram. If this is a problem that has always existed it could be that your acc nozzle is still incorrectly sized or that your shot needs to be adjusted. How does the motor react when you slowly accelerate from an idle?