How do you repair a leaking fuel tank grommet?

To repair a leaking fuel tank grommet, first, safely drain the fuel and disconnect the battery. Remove the grommet from the tank, inspect it for damage, and clean the area where it sits. If the grommet is damaged, replace it with a new one that matches the specifications. Once replaced, ensure a tight seal by reinstalling the grommet securely and reassembling the tank, then check for leaks before refilling with fuel.