Re: carb float level and other carb issues
If ya shut off the gas at the tank and she runs better, then you are effectively lowering the fuel level inside the float bowl as the engine consumes the fuel.
This leads me to believe that you have a too high of a float setting.
I don't know what kind of carb you are talking about, but as rule of thumb, I set float heights to 1/8 inch or 2mm below the gasket surface when I am repairing a mystery carb.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."