Carter WCFB 4 Barrel Accelerator Pump Circuit 3,951 views Jul 13, 2018 33 Dislike Share Mikes Carburetor 20K subscribers https://www.carburetor-parts.com is providing this video about how the. Carter WCFB 4 Barrel Carburetor Float System. Fuel is puffing out nozzles on primary circuit at idle on primary carb of a dual carb set carbs were just rebuilt what is the cause. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Each float on the float assembly should be at the same height and centered so that they dont rub the side of the float bowl. As the accelerator is released and the primary throttle plates are closed to the idle position, the upward movement of the pump plunger and attached spring bracket exerts tension on the spring and tends to stabilize the float in a level position. Any pressure put on the needle will damage it. This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. You can also check the adjustment by measuring (F) which should be 18/64. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. Share. Both Carter and Rochester engineers determined that, on some applications, the float level in the primary side of the carburetor should be different than in the secondary side of the carburetor. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. Hold throttle valve wide open and close choke valve as far as possible without forcing. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Carter used metering rods with a single step, 2-step, 3-step, and 4-step. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Must be made after fast idle adjustment. Each size must be used in its own location. Adjust by bending unloader lip on throttle shaft lever. All late model WCFB carburetors have three different length bowl cover screws. Piston force is too much for linkage. PDF Parts List Carter Carburetor Model Wcfb Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. Rotate throttle stop screw E until engine idle at approx 500 RPM. Disassembly2. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). This is percolation. Make sure manifold heat control valve is free. Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. Carter WGD Adjustments Float Level With bowl cover assembly inverted and float resting on pin in seated needle, and with gasket removed, the distance from the bowl cover to the top of float should be 7/64. Can't find the answer you're looking for?
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