Austin Classics

A down draught carburetor as fitted to the Cambridge. The idea behind the down draught design is that fuel and air are drawn down from an inlet at the top so that gravity assists the the flow of fuel and air into the engine. A new manifold was introduced with the carburetor inlet connection on the top, due to the fact that heat rises the new manifold also had to be designed to ensure good thermal separation from the inlet and outlets.

1. Union nut carrying loose fibre washer and filter gauze. 2. Petrol pipe union. 3· Float chamber retaining bolt with squared end for jet removal. 11. Float. 12. Needle seating. 13. Throttle lever. 14. Slow-running adjuster screw. I5. Throttle spindle nut. 16. Throttle "butterfly." 17. Air-regulating screw. 18. Choke throttle interconnecting adjuster. 19. Choke lever, with cam for throttle inter-connection. 20. Choke flap (with spring-loaded release valve flap). 21. Choke cable anchorage. 22. Union for Vacuum pipe to automatic ignition timing, control at distributor.