Removal

PROCEDURE

1. Disconnect the negative battery cable.
2. Drain the coolant to a level below the intake manifold.
3. Remove the carburetor cover.
4. Disconnect the accelerator cable from the throttle lever.
5. Disconnect the vacuum hoses from the carburetor.
6. Disconnect the connector from the solenoid valve for forced idle.
7. Place a container under the fuel hose connections to catch spilled fuel, then disconnect the fuel supply hoses from the carburetor fittings.
8. Remove the bolts and remove the carburetor from the engine.
Disassembly

Do not remove the choke valve and throttle valves.

PROCEDURE

1. On a carburetor with automatic choke, disconnect the cooling system hose from the carburetor body fitting.

2. Disconnect the choke rod from the free lever.

3. Remove the bracket with the connector.

4. Remove the choke device.

5. Disconnect the accelerator pump rod from the throttle lever.
6. Remove the float chamber cover, remove screw "B", and remove the carburetor body.

7. Remove screws "A" and remove the float chamber cover from the main body.

8. To remove the float chamber cover, insert the blade of a flat-blade screwdriver between the cover and the main body and, using the screwdriver as a lever, slowly separate the cover.

Do not apply excessive force when removing the cover.

9. Remove the stud, then remove the float and needle valve.

Do not drop the float.

Take care not to damage the needle valve.

10. Using a flat-blade screwdriver as a lever, remove the needle valve seat.

When removing the needle valve seat, do not damage the float chamber.

11. Remove the retainer and the solenoid valve for forced idle.

12. Using a thin-blade screwdriver, release the latches and remove the two terminals from the connector of the solenoid valve for forced idle.

13. Remove the accelerator cable support bracket.
14. Remove the idle jets and the main air bleed.

Use a thin-blade screwdriver to remove the jets and work carefully to avoid damaging them.

15. Remove the accelerator pump and check the ball and weight.

To remove the accelerator pump, do not turn over the body with mixing chambers. Check the ball and weight through the holes in the gasket.

16. Separate the float chamber from the carburetor body.
17. Remove the main jets.

Use a thin-blade screwdriver to remove the jets and work carefully to avoid damaging them.

18. Remove the three screws securing the mixture enrichment valve cover to the float chamber body. Remove the cover, spring, and diaphragm.
19. Using a screwdriver, loosen the mixture enrichment tube and remove the spring and ball.

The choke valve assembly consists of many small parts. Do not lose them.

20. Remove the four screws securing the accelerator pump to the float chamber cover. Remove the pump cover, diaphragm, spring and gasket.

Before installing the accelerator pump screws, apply thread locking compound to their threads to prevent them from loosening.

21. Remove the E-clip and washers from the secondary throttle shaft and remove the diaphragm spring.

22. Remove the two screws securing the diaphragm bracket to the carburetor body and remove the throttle diaphragm.

23. Remove the auxiliary accelerator pump.

24. Drill a 2 mm hole in the center of the idle mixture screw (MAS) hole, then enlarge the hole with a 3 mm drill. Insert a punch into the drilled hole and drive out the plug.