|The fuel arrives through the needle valve (1) to the bowl (4) where the float (3) controls the opening of the needle (2) in order to maintain a constant fuel level. Through the ducts (6) and the main jets (5), it reaches the emulsioning tubes (12) from which after having been mixed with the air coming from the air corrector jets (11), through the pipes (10) and the nozzles (7) it reaches the carburation area consisting of the auxiliary Venturi's (8) and chokes (9).|
| The fuel flowing
from the bowl (4) arrives to the starting device through the ducts (32) and the starting
jets (30). Emulsified with the air coming from the hole (29) it reaches the valves opening
(35) through the ducts (31) and definitely emulsified by the air entering from orifices
(34) is then carried by means of the ducts (33) to the carburetor throats below the
Engine cold starts: starting device inserted (position A)
Engine starts half warm: partial insertion of the device (position B)
Engine warm ups: during engine warming up,
even if the vehicle is under way,
Normal operation: starting device must be
pushed back as soon as the engine
| The fuel is carried from the bowl (4) to
the calibrated holes of the idling jets (14) through the ducts (15). Emulsified with the
air coming from the ducts (13) through the ducts (20) and the idling feed holes (18)
adjustable by means of screws (19) the fuel reaches the ducts (20) the mixture can reach
the carburetor throats also through the progression holes (16)
|By closing the throttle valves, the lever (25) , by means of the shaft (27), lifts the piston (26). the fuel is thus drawn from the bowl (4) into the pump cylinder through the suction valve (23). By opening the throttles, the shaft (27) is free and the piston (26) is pushed down under the action of the spring (28), by means of the ducts (22) the fuel is injected into the carburetor throats. The inlet valve (23) is provided with a calibrated hole which is discharges the excess fuel delivered by the accelerating pump in to the float bowl.|
NOTE: the operation of leveling of the float must be carried out
whenever it is necessary to replace the float and needle valve: in this case it is
advisable to replace also the sealing gasket, making sure that the new needle valve is
tightly screwed in its housing.
|5. Idle jet holders 7. Idle air orifices 16. Additional Air Horns 18. Pump inlet valve 29. Idle mixture adjustment screws 30. Pump jets 34. Pump control rod 39 Spring guides and retainers 42. Mixture ducts 43. Starting Jets 45. Starting jet wells 61. Pump deliver vlave 62. Progression holes inspection screw 63. Emulsion tubes complete with main jets and air corrector jets 64. Air Horns mounting plate. 65. Bowl plate 66. Idle speed adjusting screw 66. Idle speed adjusting screw 67. Throttle control lever 68. Retainer Washers 69. Pump Spring retainer plate 70. Throttle return spring retaining plate|
I highly recommend you buy and use the Weber Service Manual for DCOE carburetors! It gives detailed pictures on how to repair your Weber carbs. If you want to know more about the way Webers work, you purchase the book on Weber Theory. Try your local book stores or Autobooks in Michigan.
This web site was created using Weber printed materials and copied verbatim
credit is here by given to E.Weber, Bologna Italy
This page created 4/8/98-revised 4/22/00
This page has been mirrored here just to help ensure such a great
resource is not lost.
Would you like to join the ring?
[Skip Previous] [Previous] [Next Site] [Skip Next Site] [Random Site]
[Advance 5 Sites] [List Sites] Want to join the Spridget Ring?
In Association with The Midget & Sprite Club
This MG Cars Webring site is owned by Paul Tegler
[Skip Previous] [Previous] [Next Site] [Skip Next Site] [Random Site] [Advance 5 Sites] [List Sites]
Want to join the MG Cars Ring?
Want to see how we rank with the top 100 automotive webrings on the net?