The PAW should be an air-bleed carb. a little screw on the side or top that closes off a small hole in the carb, turning it in reduces the amount of air going thru the hole thus
increasing the fuel draw they most often are close if the screw covers half the hole you may need a little more close off. also check and make sure no air leaks on carb mounting
O ring compressed?? I have used a small amount of Koppercoat gasket sealer around O rings then re-inserted carb martin

also engine may still be tight and not broken in fully yet, it might just need more run in time