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Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. Hold a straight edge across top of dust cover housing, next to the pump arm. 2: Carter AFB idle mixture and speed adjustment screws. Carter WCFB 4 Barrel Accelerator Pump Circuit Carter BB Carburetor Assembly Part 1 of 2 Rochester Quadrajet Idle Tube Removal Tunning Rochestor Quadrajet 4 barrel Carburetor Mark Osborne. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Make sure manifold heat control valve is free. Be sure these ports are clear. Once engine speed gets high enough, the carburetor vacuum is strong enough to pull fuel through the main jet and the accelerator pump circuit is no longer used. 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. Adjusting the WCFB float level & float drop: The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. Examine the viton tip for any marks.Fuel pump pressure could be too high. 3: Holley 4150 idle mixture and speed adjustment screws. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. Fig. Put a straight edge across the dust cover as illustrated. Adjusting the WCFB float level and float drop. Older kits 30-70s. We will contact you as soon as this product is available. Back out throttle stop screw until throttle valves seat in bores. Make sure the pontoons are centered and will not rub the bowl sides. Change the choke setting to index. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. Back out throttle screw so that the throttle valve close completly. It needs about 4 lbs of pressure. The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. Check throttle linkage to make sure that primary throttle valves come to full wide open position. Carburetors equipped with an adjustable bowl vent require adjustment. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. This allows air instead of fuel to be drawn off the pump jets. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. 57-65 WCFB 1 x 4 carb - Cover only no spring or spring plate CUD3741 $ 4.99 Gasket - Base WCFB 4GC G402 $ 4.95 Flange Gasket G1164 $ 4.95 WCFB Air Cleaner Gasket . Rotate throttle stop screw E until engine idle at approx 500 RPM. Carter WCFB Fast Idle With carburetor installed and engine warmed up. If hard starting still exists change the choke setting to one point lean. 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. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. Most of the single step rods were steel. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . The setups data is the same. William C. Carter was born in Union City Tennessee in 1884. Someone has installed it improperly. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. Founded by William Carter in 1909, the Carter Carburetor Company produced units such as the AVS, AFB and 385-CFM WCFB for dozens of years. *New Accelerator Pump5. The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. parts. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads.A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. With mineral spirits in the float bowl, Raise the pump. Correct by removing any burrs or nicks. If a loss of rpm is noted, or if the engine dies, and air leak exists. Is there a pointed check weight in the main discharge hole. The carburetor will flood. Adjust by bending lip of float, not float arm. Watch this. The most complete document I have found. Carter WCFB 4 Barrel Adjust Float Mikes Carburetor 21.4K subscribers 5.5K views 4 years ago https://www.carburetor-parts.com is providing this video about adjusting the float level and. Hold throttle valve wide open and close choke valve as far as possible without forcing. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. Two ports act as calibrated air bleeds. Gasket removed as shown A. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Run a blunt object around the inside of the leather cup to make sure any coating is broken. WCFB carburetors, althqugh basically all units are allke. Use a brass drift punch. This is an electronic rebuild manual, no physical copy will be provided. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). Piston force is too much for linkage. This restricts the flow of fuel. Place the choke housing toward the left and remove upper right main body to throttle body screw. Adjust by bending the connector rod at the lower bend (E). Fuel enters the primary side of the carburetor through a strainer screen at the fuel inlet and is directed to the primary needle valve and . Outside top of early Carter tool box with correct decal. *New Airhorn Gasket7. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Measure from toe B to air horn. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Can't find the answer you're looking for? Notice holes from which linkage rods are removed so they can Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. The Solid fuel is the later models BBDContents:00:00 intro00:34 air bled adjustments00:37 air bled float setting01:03 air bled fast idle type I01:25 air bled fast idle type II01:42 air bled fast idle type III01:58 air bled unloader02:24 air bled choke vacuum kick03:01 air bled automatic choke03:16 air bled pump04:08 air bled dashpot04:27 air bled idle speed \u0026 mixture04:58 air bled emission carburetors idle mixture06:00 air bled limiter cap06:36 solid fuel adjustments06:40 solid fuel float setting07:03 solid fuel metering rod07:27 solid fuel accelerator pump07:55 solid fuel bowl vent08:18 solid fuel fast idle cam08:43 solid fuel choke pull-off09:12 solid fuel automatic choke09:24 solid fuel egr dump valve09:46 solid fuel unloader10:08 solid fuel high altitude10:28 solid fuel idle speed \u0026 mixture12:11 solid fuel Limiter cap12:37 solid fuel fst idle12:51 solid fuel throttle positioner13:56 solid fuel vacuum throttle positioner14:31 solid fuel sol-vac15:04 solid fuel dashpot15:28 solid fuel transducer Ultra-Sonic Cleaning3. The mixture screw may be bent, or damaged. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Any bubbles indicates a leak.Make sure the 2 floats are the same height. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Adjust idle screws D to produce a smooth idle of correct speed is obtained. These diagrams include: Fig. One of the butterflies is open about 1/8 with the carburetor dis assembled. Then close throttle. All late model WCFB carburetors have three different length bowl cover screws. WCFB Carburetor Cutting Out on Left Hand Turn. Carter WCFB Build Sheets How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. With engine running, check for an air leak at front left corner of carburetor between throttle body and bowl by squirting carb cleaner at this point. Blowing out passages will not get them clean enough. Contact Us Home Blog FAQ's Technical Help My Account LoginRegister Examples of Carb Numbers search 0$0 Carburetor Parts by Make & Model Scroll to see more Aero Coach Carburetor Parts Alfa Romeo American Bantam American General American LaFrance American Motors Nash Rambler Auburn Audi Tyler's Forgotten Car Rescue 22,933 views. Can't find the answer you're looking for? Good quality print. This check prevents excessive pressure in the discharge passage during acceleration. This can be done by looking at the impression on bowl cover gasket. He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. Back off the idle screw so that the throttle plates close completely. Can't find the answer you're looking for? The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. They are not meant to fill the hole, only to restrict it. The piston is brass and can be damaged very easily. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty.