I've got a metal line from the tank to the pump, but the tank does have the shutoff valve, and that helps stop the gas flow. But the fuel seems to run back from the carb, too, so I lose a bunch of gas in any event. My gasket does not seem to be so beat up. I suspect it has a valley pressed into it which is no longer lined up with the bowl - or in other words - the gasket has lost its elasticity. The original gasket must have been cork, and I wonder if cork might be better. I've got some cork material lying around, maybe I'll try making a new gasket.
