I had same issue and finally got it to start, but would not run with full load thanks to the ethanol gas. I found a new carb. on EBay for $164 and runs, and starts better than ever. I only run non ethanol gasoline now and have no more issues. Can't stress enough the importance of running the generator at least monthly.
LOL! Why dont you think your generator will run with full load on ethanol gas when others will? Do you have a special generator?