As Dave suggested it seems that the needle valve in the carb float bowl may have picked up a bit of grit. the float determines the max height of fuel in the bowl, the float then lifting the needle into a position where it shuts of the fuel supply, and as the engine uses up fuel, the float drops to allow more fuel into the bowl until the fuel reaches the pre determined level...
If your fuel filter was clogged, either that suggests it has been in there a very long time or you have perhaps some contamination in the fuel tank....
When fitting a new fuel filter to an old rubber fuel pipe it is possible to nick the internal bore of the pipe and dislodge small particles of rubber, which will be after the filter, and thus find it`s way to the float bowl causing the issue you describe..
sometimes the grit can be dislodged with a few rapid taps on the side of the float bowl with a spanner,...
It is not a big task to remove the float bowl lid and observe the inner workings, though best research on the www if you intend to resolve what should hopefully be a simple enough issue..?
Good luck in your choices.
