You will likely need to drain the gas tank.
It is probably best to drain and flush the tank.
take the tank off and flush it out with a water hose...
pancake sryup is my gas tank, what do i do?
the tank will leak
What happens when chicken bone gets stuck in gas tank
pancake sryup is my gas tank, what do i do?
remove the fuel tank and drain the water
you will have to drain the gas tank and flush the gas line with a gas line conditioner that you can get at a auto parts store.
Nothing
well, go to the nearest auto store, and buy gas tank/radiator repair patch.
Replace your thermostat, radiator cap and flush your radiator with pressure.
You'll have infinite gas and live forever.