[AZKen]

Run it from a gas can with a hose down in can and attached other end to pump inlet. If it still does it, at least you have eliminated everything south of the pump. Which means it's the pump or carb. If does not do it, it's not pump or carb. Just use a regular gas can sitting on the ground. The pump will suck the gas just fine. No filter, new hose.
Once you get that info, you can isolate some more components or replace or test or repair. Report your findings if you need more ideas. Glad to try and help. Don't forget about gas tank venting.