Best way to find it to follow the fuel line from where it enters the engine (comes out of the quick disconnect)to the first black metal thing it goes to. Either a fuel pump or gas filter. Works on every engine.
See items 23 thru 33 under Carburetor. Those items form the filter and fuel pump attached to the carburetor.
The line that George is talking about will follow right from the engine quick connect to the filter, the filter is attached to the fuel pump and both are attached to the side of the carburetor.