Stihl fs80 pro

My stihl gas trimmer is smoking white smoke and using ALOT of gas. It also has alot of oily gas residue around the exhaust. I just replaced new carb kit and plug, and fuel line and filter and ignition coil. I mixed gas 50:1 so I'm not sure what to look at next? The engine runs great by the way. Always starts on the first pull. But the strong gas odor and consumption along with the smoke has me concerned a bit.