Section 5 Fuel System and Governor Disassembly Disassemble the carburetor using the following steps. See Figure 5-6. The choke plate is spring loaded. Check to make sure it moves freely on the shaft. Always use new gaskets when servicing or reinstalling carburetors. Repair kits are available which include new gaskets and other components. These kits are described on page 5.10. 1. Remove the intake elbow and hose (if attached), breather hose, and carburetor. Refer to Section 9 - "Disassembly". 2. Remove the four screws and carefully separate the air horn assembly from the carburetor body.
Float If symptoms described in the carburetor troubleshooting guide indicate possible float level problems, a check of the existing float level may be performed as follows. It is not necessary to remove the carburetor from the engine to check or adjust the float level. 3. Loosen the screw securing the float assembly to the air horn and remove the float, float shaft and fuel inlet needle. 4. Remove the slow jet from the carburetor body. 1. Remove the air cleaner and breather hose. Refer to Section 9 - "Disassembly". 5 NOTE: The main jet is a fixed jet and can be removed if required. Fixed jets for high altitude are available. 2. Disconnect the fuel line from the carburetor. 5.
Remove the black cap on the end of the choke shaft only if it is necessary to inspect and clean the shaft spring. 3. Clean dirt and debris from exterior of carburetor. 4. Remove the four screws holding the two carburetor halves together. Carefully lift the carburetor air horn assembly off the carburetor body and disconnect the choke linkage. 6. Remove the low idle speed adjusting screw and spring from the carburetor body. 7. In order to clean the "off-idle" vent ports and bowl vent thoroughly, use a good carburetor solvent (like Gumout™). Blow clean compressed air through the idle adjusting needle hole. Be careful to use a suitable shop rag to prevent debris from hitting someone. 8.
Remove the formed rubber gasket only if it is to be replaced. If it is removed for any reason, replace it. Inspection/Repair Carefully inspect all components and replace those that are worn or damaged. Figure 5-4. Carburetor Mounting Detail. Inspect the carburetor body for cracks, holes and other wear or damage. 5. Hold the carburetor air horn so that the float assembly hangs vertically and rests lightly against the fuel inlet needle. The fuel inlet needle should be fully seated but the needle tip should not be depressed. See Figure 5-5. Inspect the float for cracks, holes, and missing or damaged float tab. Check the float hinge and pin for wear or damage.
Inspect the fuel inlet needle and seat for wear or damage. 5.7