Not sure if my issue is the regulator, but I have a 120SC inverted in a plane. When I'm done flying and stop the engine, the carb will start dripping with fuel. If I invert the plane, the entire carb fills with fuel and starts to over flow. I know I need to let the pressure out of the vent line, but my other YS engines never did that. Is my regulator not adjusted correctly? I bought this motor used. Run very well, but I want to take care of the fuel dripping.

Also, when I land the plane, sometimes I can not throttle up and taxi back to the flight line. I'm assuming the fuel is puddling from the motor being at idle for so long on approach.

Any help is appreciated.

Thanks......Mark