Make sure the ignition is off.
Relieve fuel system pressure by unscrewing the fuel tank cap.
See Figures 1, 2, 3 and 4
Fig. 1: Use a suitable line wrench to disconnect the fuel line from the carburetor fuel inlet nut
Disconnect fuel line connection at fuel inlet filter nut.
Fig. 2: Loosen the fuel inlet nut using the proper size line wrench or socket
Remove fuel inlet filter nut from carburetor. Using a line wrench will prevent the flats on the nut from rounding during removal and tightening.
Fig. 3: Finish unthreading the fuel inlet nut by hand, then remove the nut and fuel filter assembly from the carburetor
Remove filter and spring.
Fig. 4: The fuel filter may now be remove from the inlet nut
If removed, install check valve in fuel inlet filter. The fuel inlet check valve must be installed in the filter to meet Motor Vehicle Safety Standards (MVSS) for roll-over. New service replacement filters must include the check valve.
Install fuel inlet filter spring, filter, and check valve assembly in carburetor. Check that the valve end of filter faces toward the fuel line. Ribs on closed end of filter element prevent filter from being installed incorrectly unless forced.
Install nut in carburetor. Tighten nut to 18 ft. lbs. (24 Nm).
Install fuel line and tighten connection.
Start engine and check for leaks