Something like:
feed line from pump
to a nut
the nut on the carb
?
Use a line wrench & ** carefully ** take it off. There ** may ** be the very fine filter just iinside the nut fitting.
I had a Ventura that had that filter. When it clogged up, idle was good-to-fair, but giving it throttle would quit.
I don't recall if there are 2 nuts or 1, use care so as not to twist // kink the metal line.
Before you do that, lets see if anyone agrees or not.