We all have problems with terminology. What is a wrench in one part of the work is something different in another part of the world.. even where they are supposed to be speaking the same language.

So the basic questions...
The inlet of fuel to the carburettor .. does it point up, or horizontal? Standard it points up, and that means the fuel has to flow up from your tank to get to the carburettor .. liquids don't normally flow up hill. So the inlet has to be rotated so it is horizontal .. see the other posts above as to how that is done.

If you remove the rubber fuel feed line where it gets to teh carburettor fuel should come out (when the tap is turned on). If it does not then you have a problem before this point. Open the fuel cap on top of the fuel tank and see if that fixes it. If not then try removing the fuel line from the fuel tap and see if the fuel now come out of the tap. If not .. look closely at the tap... If you cannot see any thing wrong .. then I'd remove the tap and check fuel will come out of the tank. If fuel comes out the tank then it points to the fuel tap ...

See how your going from looking for fuel at one point .. and moving that point back and back untill you get fuel and isolate one item that is obstructing the fuel? That is the way all fault finding works. There are further considerations .. but on a simple system to a complex system .. this is what is done. It takes time, but you just work through it.

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Oh .. the vacuum line .. you seal that off. Unless the fuel tap requires it.