Strange the fuel line would go bad in a 2011 unit. But...stranger things have happened.
My 2001 had that problem just last year....turned out to be a crack in the generator fuel line. Sucking air...not gas.
All set up to drop the tank (2x4s, a floor jack, a friend, an impact driver and a 6-pack)...discovered that with a 12 inch screwdriver and my long arm, from the passenger side of the tank I could pop off the fitting (hose) and hook the new hose up, route it, and had the generator running in about 20 minits. I REALLY got lucky there.
I THINK...that with this ethanol, the line goes bad before it "should". I also THINK that the gov't has hose "standards" for this ethanol gas from the tank to the motor...but has no standards for hoses to things like a generator. So...when shopping at the auto parts store for hose, the "standard" hose is really cheap...but the "ethanol resistant" hose is quite a bit more. In fact, the old hose was not marked "ethanol resistant" or anything like that.
But mine, like I said, is a 2001. Yours, a 2011? Wow.
g'luck!