Weber 2V Carburetor
External appearance of the carburetor
1 – air dampers; 2 – fuel filter; 3 – economizer; 4 – primary chamber axis; 5 – accelerator pump drive eccentric; 6 – accelerator pump; 7 – accelerator pump drive lever; 8 – mixture quality adjustment screw; 9 – electromagnetic valve of the idle system; 10 – vacuum fitting to the ignition distributor; 11 – idle speed adjustment screw (mixture quantity); 12 – cold start device; 13 – starting device
Carburetor with cover removed
1 – throttle valve drive lever; 2 – idle speed adjustment screw (mixture quantity); 3 – vacuum nipple; 4 – electromagnetic valve of the idle system; 5 – mixing chamber; 6 – accelerator pump tube; 7 – accelerator pump; 8 – cold start device; 9 – starting device; 10 – maximum speed screw; 11 – float chamber; 12 – secondary chamber idle jet; 13 – main and air jets; 14 – main and air jets of the primary chamber; 15 – primary chamber idle jet; 16 – fuel input; 17 – Fuel return; 18 – float; 19 – float lever
The carburetor body consists of two cast parts. The upper half contains the float chamber cover, float hinges, fuel inlet and outlet fittings, fine fuel filter, spring needle valve, dual air intake, air flaps and part of the economizer valve with vacuum control.
The lower half of the body contains the float chamber, the accelerator pump, two diffusers with sprayers, throttle valves, levers, jets and an economizer valve.
The throttle valves are designed in such a way that the primary valve opens first, followed by the secondary valve, so that both valves are fully open at the same time.
The first chamber diffuser, throttle valve and nozzle are smaller than the secondaries, while the first and second chamber diffuser dimensions are the same.
All mixture formation systems are located in the lower half of the carburetor body, and the main metering systems operate in both chambers, while the idle and economizer valve systems operate only in the primary chamber, and the mixture enrichment system operates in the secondary chamber.
The accelerator pump sprays fuel into the diffuser.
On the lower half of the housing there is a fitting for controlling the vacuum ignition advance regulator.
The carburetor has a fully automatic throttle type air damper to facilitate cold engine starting.