Had my machine run out of fuel on a job, filled it up again and kept working.
The next day I noticed that the engine works fine under load but after 5 minutes when I let my hand off the trigger it would start to surge like it was struggling.
I think there may have been some rubbish at the bottom of my fuel tank that I pulled in when it ran dry.
Remove carb bowl, needle and seat. Clean, reinstall. Watch a couple YouTube videos on it and you’ll know what to look for… like not losing tiny little crucial pieces.
There’s some great advice here. After you get it running fine again, ethanol free gas really helps a ton. I’ve let my wife’s carbureted motorcycle sit for 6 months and it’ll fire right up.