Bonnar_Bloke
There are a few things you should be looking at:-
Check the carby again - in case more jellied fuel has flowed in since you last checked. Really closely check the wire gauze filter as they sometimes have invisible muck.
Then it's check the fuel line for cracks, the main filter for clogging.
One other thing you can try, is screw the idle screw in progressively as far as it will go - see if it will still run, or if the motor stalls at the 'shock' of a small throttle opening. Could be the main fuel circuit is blocked, but the idle circuit is ok.
Best of luck
Tyler
