REMOVING
Fuel System This section has been organized for servicing the fuel system. The technician should use discretion and sound judgment when removing/disassembling and assembling/ installing components.
! WARNING Whenever any maintenance or inspection is made on a fuel system when there may be fuel leakage, there should be no welding, smoking, open flames, etc., in the area.
NOTE: Before removing the carburetor, be sure the gas tank shut-off valve is in the OFF position.
1. Remove the screws securing the air cleaner cover to the air cleaner case and account for the filter and retaining plate. 2. Remove the flanged nuts securing the air cleaner assembly to the carburetor and engine. 3. Remove the air cleaner case and intake tube from the carburetor and engine. Account for the gasket. 4. Remove the drain screw w/spring (I) from the float chamber and drain any gasoline from the chamber; then install the drain screw w/spring. 5. Remove the fuel supply hose.
Pre-Maintenance Checks Before troubleshooting the fuel system, several simple checks should be performed. Many times what appears to be a serious problem is only a minor one. 1. Make sure the gas tank shut-off valve was in the OPEN position and check for fuel flow from the tank to the carburetor.
6. Disconnect the rod and spring from the carburetor; then loosen the pinch screw and jam nuts securing the choke cable to the carburetor. 7. Slide the carburetor off the mounting studs. Account for a gasket, insulator, and a gasket. DISASSEMBLING
2. Turn the shut-off valve to the CLOSED position; then remove the in-line fuel filter. If the filter is dirty, replace the filter. 3. Install a new filter making sure the arrow on the filter is directed toward the engine. 4. Check the gas tank fuel and vent hoses to ensure that all are correctly connected; then check for cracks. If any cracks are evident in the hoses, replace them making sure none are against any hot or moving parts. Hoses must fit tightly. 5. Check the carburetor float chamber by loosening the drain screw (I) and inspect it for water or debris. If seen, clean by removing the float chamber cap screw and cleaning the float chamber. 6. When ready for operation, turn the shut-off valve to the OPEN position. SNO-997
Carburetor
1. Remove the pilot jet (A) from the carburetor. 2. Remove the cap screw (B) securing the float chamber to the carburetor; then remove the chamber and account for the rubber gasket. 3. Remove the float pin (C) securing the float (D) to the carburetor body; then remove the float and needle jet assembly (E). 4. Remove the main jet (F) and the nozzle (G) from the carburetor tower.
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