Lift the tractor's engine cover and access the carburetor on the left-hand side of the engine.
Turn the fuel shut-off valve to the right to close it.
Loosen the nut underneath the float bowl.
Remove the old gasket and throw it away. Clean out the sediment screen with a paper towel and a couple drops of gasoline.
Slide a new gasket back into place and then set the filter screen inside the new float bowl. Bolt the float bowl back in place with the wrench.
Turn the fuel shut-off valve back to the left to open it back up.