Removing the vacuum choke device
1 - stopper, 2 - screws
Removing the Trigger Vacuum Diaphragm Assembly
clamp (indicated by an arrow) must be pressed.
Fuel pipe
fuel pipe (arrow) must enter the emulsion well.
1. Remove the carburetor from the engine.
2. Thoroughly clean the outside of the carburetor.
3. unscrew five screws (on the latest models - four) carburetor cover fasteners (1 - carburetor mounting screws, 2 - cover mounting screws).
4. Remove the carburetor cover paying attention to the connection of the fast idle cam and the throttle lever.
5. Remove any remaining fuel from the float chamber.
6. If necessary, unscrew the main jets and the idle jet.
7. If the float or needle valve is removed, it cannot be reused and new parts must be installed.
8. Unscrew the fuel supply pipe with filter.
9. Unscrew the three screws securing the throttle damper bracket of the first chamber. Do not remove the first chamber throttle damper from the bracket unless it needs to be replaced.
10. Unscrew the two fastening screws and, having pressed the ball joint, remove the vacuum unit.
11. Unscrew the three screws securing the pump cover.
12. Remove the cap, diaphragm, spring, washer and plug. Note the orientation of the shutter.
13. Unscrew the two fastening screws and remove the econostat.
14. Remove any remaining fuel from the float chamber.
15. If necessary, unscrew the main jets and the idle jet.
16. If the float or needle valve is removed, it cannot be reused and new parts must be installed.
17. Unscrew the fuel supply pipe with filter.
18. Unscrew the three screws securing the throttle damper bracket of the first chamber. Do not remove the first chamber throttle damper from the bracket unless it needs to be replaced.
19. Unscrew the two fastening screws and, having pressed the ball joint, remove the vacuum unit.
20. Unscrew the three screws securing the pump cover.
21. Remove the cap, diaphragm, spring, washer and plug. Note the orientation of the shutter.
22. Unscrew the two fastening screws and remove the econostat.
23. Carefully release the nylon clips with a small screwdriver and disassemble the econostat.
24. Unscrew the central bolt securing the coolant chamber and remove the chamber. O-rings are installed under the bolt head and along the perimeter of the chamber.
25. There are marks on the body of the bimetallic spring and the holder of the damper lever. If there are no labels, they must be applied. Unscrew the three screws holding the ring clip and remove the clip and housing.
26. The choke lever holder can be removed from the carburetor body with or without a bimetal body and a coolant chamber, after unscrewing the mounting screws.
27. The secondary chamber damper vacuum device can be removed after removing the damper lever holder by moving its roller stops and depressing the star clip.
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