Generator help

[Great-Kazoo]

]Sounds like a needle and seat issue.[/B] It may be stuck so gas is just trickling into the bowl. And when it sits long enough the bowl fills up and then it will start and run until the bowl goes dry again. Old gas can create vanish when it evaporates and it is very sticky stuff. Did you soak the whole carb in cleaner when you did the rebuild. Some of the small holes or venturi's can get clogged as well.

What carb & motor?

One way to reseat that unit is some ashes. Use it as a lapping compound to clean up any wear spots between needle & seat. But first look at the needle, that rubberish part van be trashed. You also need compressed air, like Big E3 mentioned, those passages need to be free of any particulates.

When you replaced the carb - manifold gasket, was it put on correctly. Regarding the carb, if it had any whiteish residue in the bowl area, you'll end up replacing the unit. That "corrosion" is seen in the bowl area has probably worked it's way in to other areas. Did you remove the fuel mixture screw and clean it out.