Trouble with the Stihl 070

[Fokke]

I have this Stihl 070 I use for milling. I've changed the piston rings and rebuilt the carburetor when I got it last year
Now it does work well when I start it but when it gets hot it doesn't anymore. It doesn't idle well, doesn't take the gas unless I fiddle with it, bogs under load and is hard to start. I have no idea what might be the problem

[teakwood]

Sounds like a air leak. check, or better replace fuel intake hose, carb boot, pulse line and maybe a new carb kit or a new aftermarket carb