How to Rebuild the Carburetor in a Homelite Chainsaw Super XL Auto
The Homelite Super XL chainsaw is one of the old warriors of the American chainsaw business. The saw is no longer manufactured, but due to its rugged construction, thousands of these saws remain in woodsheds across the country. After a number of years of disuse, the saw may be difficult to start or it may run poorly, most likely due to varnish deposits inside the carburetor. The only solution at that point is to rebuild the carburetor.
Remove the nut on the top of the saw holding the air filter cover in place. Remove the air filter cover and air filter.
Disconnect the throttle linkage and choke linkage from the carburetor. Disconnect the fuel line. If the fuel tank is not empty or near-empty, pinch the loose fuel line closed with a small clip.
Unscrew the two carburetor mounting screws using the flathead screwdriver and remove the carburetor from the saw. Take care to maintain all of the parts and gaskets on the cylinder side of the carburetor for reassembly.
Remove the pump diaphragm cover screws using the Phillips screwdriver. This is the side of the carburetor that was facing up while it was in the saw. Remove and discard the old diaphragm and gasket, taking care to note the orientation of the diaphragm on the carburetor body. Remove the filtering screen.
Turn the carburetor over. Remove the main diaphragm cover screws using the Phillips screwdriver. Remove and discard the main diaphragm and gasket. Slide the diaphragm toward the fuel mixture screws in order to disengage it from the control lever.
Remove the pin retaining screw with the flathead screwdriver, then remove the pin, control lever, spring and inlet needle.
Remove the high and idle speed mixture screws and springs from the side of the carburetor using the flathead screwdriver.
Clean the carburetor body thoroughly with carburetor cleaner and then spray the body thoroughly with compressed air.
Reinstall the high and idle speed mixture screws and springs. Lightly seat the needles then back them out one full turn.
Install the new inlet needle and control lever, along with the old spring and pin. Install the pin retaining screw.
Install the new main diaphragm gasket and diaphragm. Replace the main diaphragm cover and reinstall the diaphragm cover screws.
On the pump diaphragm side, install the new filtering screen. Install the new pump diaphragm and diaphragm gasket. Replace the pump diaphragm cover and reinstall the diaphragm cover screws.
Replace the front and rear gaskets on the carburetor and then reinstall the carburetor. Make sure to tighten the carburetor mounting screws.
Reconnect the throttle and choke linkages and reattach the fuel line, removing the clip if you used one. Replace the air filter, air filter cover and air filter cover nut.
Always use carburetor cleaner in a well-ventilated area.
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