Float Chamber Needle Valve (Weber 2V TLD)

The location of the float and needle valve in the carburetor cover

Float adjustment

The operation of the needle valve determines the level of fuel in the float chamber.

1. Remove the ground wire from the battery and the air filter housing.

2. Remove the wires from the automatic starter.

3. Remove the fuel supply and return hoses from the carburetor.

4. Disconnect the wires from the body of the starting automation.

5. Disconnect the wires from the fuel shutoff valve.

6. Unscrew the four screws securing the carburetor to the intake manifold.

7. Unscrew the two mounting screws and remove the carburetor cover, leaving the main part of the carburetor in place on the intake manifold.


8. Remove the float shaft and remove the float.

9. Remove needle valve.

10. Unscrew the needle valve body.

11. Before installation, check the condition of the conical surface of the needle point.

12. Screw in the needle valve body with a new copper gasket.

13. Insert needle valve, float and float shaft.

14. Check the float adjustment by setting the top of the carburetor so that the needle valve is closed, but the valve ball must not be recessed. Measure the distance from the top of the carburetor gasket to the bottom of the float. If the resulting size does not match the required one, bend the persistent tongue on the float.

15. Install the upper part of the carburetor and the remaining previously removed elements. Check and, if necessary, adjust the speed and quality of the idle mixture.