When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. This is an electronic rebuild manual, no physical copy will be provided. The correct way is to use a fuel pump pressure gauge. Also make sure one isnt rubbing on the side. Sometimes scraping around the edges with an awl will remove the staking. Hold air horn upright with floats hanging. I. DISASSEMBLY. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). This box did not have a part number. When closing the throttle, the accelerator moves up in the pump well. Can you help me out? Gasket removed as shown A. The ends of the connector rod should point to the throttle arm side. Watch this. DO NOT apply any pressure on the needle. While holding the parts as indicated above, rotate the metering rod arm B until the finger on the arm at D contacts the lug on the vacuum piston link C. Primary & secondary float will probably have different measurements. Gasket removed. Coat threads of screw with sealing compound and install it. On 1956 models one point rich. 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. With mineral spirits in the float bowl, Raise the pump. Adjust by bending throttle connector rod at deepest angle as shown. You need to run wire down all small passages. You can also check the adjustment by measuring (F) which should be 18/64. If it is, tap gently with a hammer and the same brass drift punch to seat it, or replace the check weight. intro Carter WCFB 4 Barrel Carburetor Rebuild Mikes Carburetor 21.5K subscribers Subscribe 51 Share 3.1K views 9 months ago Disassemble & assemble your Carter WCFB 4 barrel. The well should fill with fluid. Someone has installed it improperly. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. It needs to go up and down easily.Is there aspringunder the power piston?Are the venturi cluster gaskets sitting flat and not curled over? With throttle valves seated in bores, dust cover and gasket in place. Carter WCFB Build Sheets How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. They work fine when I push hard down on the piston. It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Coat threads of screw with sealing compound and install it. You should feel some pressure and fluid should not be bypassing the check needle. 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 . The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Do not depress float lip against spring in needle, but let float rest of its own weight. On the WCFB the check ball is usually at the bottom of the pump well. BBS) and were basically an on/off condition similar to the function of a power valve. As for the pump not squirting.I suspect the pump well isnt filling up. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Adjust by bending throttle connector rod at upper angle (B). With carburetor installed and engine warmed up. They sometimes need trimming. a. 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. Piston force is too much for linkage. These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Place universal pump travel gauge T109-117S (if you happen to have one as they are not available) inverted on edge of dust cover boss of bowl cover. Can't find the answer you're looking for? Master Technician Tool Set (early, circa 1935, for 1923~1935 Carter carburetors all makes - most tools then current) Carter Master Technician Tool Set about 1951. The metering rod adjustment should be done after the pump adjustment. Adjust by bending float arms, making sure both pontoons on each float are the same height. 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. (note) The metering rods will fit into the jets loosely. I rebuilt a Carter WCFB carburetor with the lower auto choke setup. Aspringis inserted in the power piston hole, then the piston. Hold throttle valve wide open and close choke valve as far as possible without forcing. Can't find the answer you're looking for? I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. Install the pump connector rod (D) in the outer hole, long stroke. Older kits 30-70s. I have repeated multiple times with same results. When replacing them hold them tight against the wall while tightening the screw. Rotate throttle stop screw E until engine idle at approx 500 RPM. Install the pump connector rod (D) in the outer hole, long stroke. With choke valve tightly closed, tighten fast idle adjusting screw (K) (on high step of cam) until there is the clearance as listed on carburetor specification page between throttle valve and bore of carburetor, side opposite idle port. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. This restricts the flow of fuel. Carter WCFB 4 Barrel Adjust Float. 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. One is in the secondary venturi and the other just above the throttle plate. Free shipping for many products! Test the needle by holding it down gently with a brass drift punch. but if it runs well you don't really need to make any adjustments. Correct by removing any burrs or nicks. Carter WCFB Carburetor E-Manual Download eWCFB, The file is in PDF format, you can download and save/print a copy, FREE to our customers that buy a rebuild kit. There should now be .018 .023 clearance between throttle valve and bore of carburetor (side opposite idle port). Seat the discharge check by tapping lightly in the hole to form a good seal. The piston is brass and can be damaged very easily. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. This check prevents excessive pressure in the discharge passage during acceleration. Disassembly2. Gasket between bowl and base is installed backwards (easy to do). It's highlighted yellow and will look something like this. 41-98N Carter 2366S Carter 2505S Carter 2555S Carter 2655S Carter 2669S. When adjusting the screws doesn't change the RPM then it means there is a problem with either the air, or the amount of fuel. Rotate screw C, or bend tang, until throttle valves are open the distance listed in, With throttle valves held wide open, there should be a clearance between upper edge of choke valve and the inner wall of air horn (. Watch on. parts. With rods held in this position, revolve metering rod arm (F) until lip contacts vacumeter link. A balance passage connects the primary and secondary float chambers to provide fuel level control when the vehicle is accelerating, stopping, or rounding curves. The idle mixture screws adjust the amount of air/fuel mixture that goes up to the venturi at idle. Be careful removing the intake check retainer. 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 seat. This is an electronic rebuild manual, no physical copy will be provided. It should not be opened up. 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. Run a blunt object around the inside of the leather cup to make sure any coating is broken. Share. The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. During high speed operation a vacuum exists at the pump jets. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. A stand pipe is provided at both needle seats as an additional trap for foreign material that might prevent the needle valves from seating properly. Make sure these are clear if you have percolation problems. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Clogged idle tube, or passages in the idle circuit. Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. Hold a straight edge across top of dust cover housing, next to the pump arm. Low fuel pump pressure always check you motors manual for the correct pressure. All late model WCFB carburetors have three different length bowl cover screws. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). Enter Carb Number. Other than that, great company to deal with. Adjust by bending unloader lip on throttle shaft lever. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Check to see that slots in air cleaner gasket line up with vent tubes and do not rotate gasket during installation of air cleaner. Carter WCFB Fast Idle With carburetor installed and engine warmed up. Can't find the answer you're looking for? Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Make sure the pump relief check is clean. Ethanol leaves deposits behind that acts like corrosion. Inspiration for this arrangement was provided by the federal government through its exhaust emissions regulations. 1955 Pontiac - Loading or Carburetor Flooding To correct, remove carburetor and turn it upside down. Blowing out passages will not get them clean enough. b. Adjust by bending the choke connector rod at lower angle (H). Change the choke setting to index. Quick test to see if the accelerator pump is working. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. 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. Disassembly2. The manual says to back out the throttle stop screw and hold the fast idle cam in the "choke open" position, then screw in the throttle stop screw until it just contacts the throttle lever arm, then give it another full turn. Solid fuel has the 2 tubes pointing up. When the engine gets hot and then is shut off, gas can sometimes overheat and then boil. New fuel pumps are especially suspect. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. See figure 9F-2. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. The flat surface of the pump arm should be parallel to the straight edge. 2: Carter AFB idle mixture and speed adjustment screws. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. Back off the idle screw so that the throttle plates close completely. Adjust by bending the connector rod at the lower bend (E). Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. Good quality print. FREE to our customers that buy a rebuild kit. Take the top off and put the pump in the well all the way to the bottom. *New Airhorn Gasket7. Carter WCFB 4 Barrel Carburetor Float System. Tyler's Forgotten Car Rescue 22,933 views. Carter built the first successful 4 barrel carburetor, the WCFB (Will Carter Four Barrel) which first appeared in 1953 on Buick cars. Both valves should be closed. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. 1955 Chevy Hard starting after flooding. Carter 2 Barrel BBD Adjustments Mikes Carburetor 21.5K subscribers Subscribe 7.9K views 1 year ago In this video we are going to show you how to do the various adjustments on both the Air. Your friend will receive an email from you with a link to our site. As the spring fatigues, the air valve will open too soon, creating an instantaneous lean condition, and a bog. Measure float height as illustrated above. cm448. From my experience it is the most complete and comprehensive source for all things carburetor, encompassing a massive spectrum of makes models and applications. What more could you ask for? They know their stuff and provide technical assistance and guides in both paper and video formats. Each size must be used in its own location. 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 Product information . No metering rod gauges are necessary. Check your auto manual for the spec, but somewhere around 4-5 lbs would be good.Be sure the power piston is not frozen in one position. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Add a couple drops of oil to the leather. Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. In this video I show you how to replace the fast idle spring on the WCFB carburetor. The accelerator pump circuit resides on the primary side of this carburetor. Make sure the air cleaner gasket does not block the bowl vents. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. Pulloffs : CUFWCFB2 $ 0 . The ends of the connector rod should point to the throttle arm side. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. The fuel is also conducted through a passage in the air horn to the secondary needle seat. 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. 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. Carter WCFB Rebuild kits: Rebuild Kits. Fast, secure e-book download. Ideas?? One caveatits my impression that the float bowl is full because when I disconnect the fuel supply line from fuel pump (to card), it has pressure on the line. Make sure the air horn contacts the inner wall of the bowl. Can't find the answer you're looking for? Seat the intake check by tapping lightly in the hole to form a good seal. Back out throttle lever set screw until throttle valves seat in bores of carburetor. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Some have a coating to give it a better shelf life. 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 Is there a pointed check weight in the main discharge hole. Examine the viton tip for any marks.Fuel pump pressure could be too high. 60 pages of great info. The high speed air bleed and the secondary bleed tube also acts as an anti-percolator. As the engine gains in RPM, the vacuum drops and the metering rods are pulled out of the main jet allowing more fuel to flow. Recheck unloader settings with carburetor on the engine. William C. Carter was born in Union City Tennessee in 1884. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. One of the butterflies is open about 1/8 with the carburetor dis assembled. Hold air horn upside down with floats in place and gasket removed. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Loosen the clamp screw A Press. Then close throttle. The single step rods were used on some of the price leader carburetors (i.e. The balance passage also tends to prevent flooding in the event one of the needles should temporarily become stuck open by maintaining equal fuel level between the two float chambers. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. Eckler's Premier Quality Products 57132129 Chevy Carburetor Rebuild Kit Carter WCFB Replacement Kit Includes All Gaskets, Seals, Check Balls, Springs, Accelerator Pump & Needle Valve Read more CARTER 4 Barrel WCFB DUAL CARBURETOR KITS & FUEL FILTERS 1961-65 CHEVROLET 1955-56 DESOTO April 18, 2018 Carter Carburetors Rebuild Kits Most of the single step rods were steel. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . However, it is very similar and I found it very useful. Rotate throttle stop screw E until engine idle at approx 500 RPM. 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 seat. Air Bled has the venturi tube pointing down into the bore. cm448: Ebook carburetor service manual - 341 pages, 272 MBytes, pdf format. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. Find many great new & used options and get the best deals for 19571958 Plymouth Fury Carter WCFB Carburetor *Remanufactured at the best online prices at eBay! Measure from toe B to air horn. The setups data is the same. The carburetor will flood. A stand pipe is provided at both needle seats as an additional trap for foreign material that might prevent the needle valves from seating properly. A float lifter spring, which is connected to the lever arm of the primary float and to a bracket on the accelerator pump plunger, is incorporated to stabilize primary bowl fuel level and prevent float bounce upon sudden stops, or on rough roads (these springs are nowhere to be found). This circuit provides a measured amount of fuel when needed on acceleration until the vacuum and main circuit can take over. We use a small bottle type of brush and spray silicon spray into the cylinder while we clean. If a loss of rpm is noted, or if the engine dies, and air leak exists. To correct, remove carburetor and turn it upside down. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn Refer to the Adjustment Data Table for adjustment dimensions. Shorter and smaller overall than the 4GC Rochester, the WCFB was the right choice for dual-quads on a compact . He only had 5-years of formal education and in 1909, he founded the Carter Carburetor Manufacturing Co in St. Louis. Ultra-Sonic Cleaning3. Carter carburetors fitted with air bleed idle mixture adjustment also have fuel emulsion mixture needles, but these are sealed at the factory to limit the amount of fuel admitted during idle. 1: Carter WCFB idle mixture and speed adustment screw location. Put a straight edge across the dust cover as illustrated. 1956 Chevrolet Corvette & Super Power Kit Engine Idle Speed, Idle Mixture and Throttle Linkage Adjustment Procedure. 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. Adjust by bending arm (J) on choke trip lever. You cannot go wrong with Mikes carburetor in any way. Note te larger box, and the number of additional tools from the 1935 set. Carter WCFB 4 Barrel Carburetor Float System. Use a brass drift punch. A fuel pump cannot be tested by unhooking the line and seeing if gas comes out. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. Fig. WCFB Carburetor Cutting Out on Left Hand Turn. Technical Details. Blow air through the main discharge to make sure the passage is clear all the way to the pump well. The file is in PDF format, you can download and save/print a copy. When removing valves they should be marked so that they get put back the same way. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. 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. If hard starting still exists change the choke setting to one point lean. Carter WCFB Carburetor Catalog Free WCFB Carburetor Manuals These manuals contain specifications, parts lists and instructions.The manuals can also be used to help identify those carburetors without tags. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. The accelerator pump circuit resides on the primary side of. Any pressure put on the needle will damage it. This eliminates any bog or hesitation when acceleration. Carburetors equipped with an adjustable bowl vent require adjustment. pump rod until the top of the pump arm is horizontal (or the screw that retrains it is perfectly vertical, if you prefer). 5:04. The adjustment of the pump is important in order to get the required fuel. Back out throttle stop screw until throttle valves seat in bores. 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 . Can't find the answer you're looking for. It needs about 4 lbs of pressure. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Some models have a pump relief check in the bottom of the fuel bowl. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. The download link will expire in 30 days. To correct, remove carburetor and tighten throttle lever by either peening end of shaft over, or soldering end of shaft to throttle lever. The Carter AFB uses weights, and therefore never goes out of adjustment. Check the low speed jets to make sure they are clear (#44). If not then clean it and try again. When that is the case, I bend the accel. Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! The balance passage also tends to prevent flooding in the event one of the needles should temporarily become stuck open by maintaining equal fuel level between the two float chambers. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. Make sure the pontoons are centered and will not rub the bowl sides. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . Float drop not set, or fuel pump pressure too low. 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. 1963-64 Studebaker Carter AFB 1962-1965 Chevrolet 327 and 409 engine carburetor manual 1958-1968 Lincoln carburetor manual AVS 1966 Chevrolet 327 and Marine Carter AVS carburetors BB Ball and Ball Single Barrel downdraft manual: 1939-60 Chrysler, Dodge, Plymouth Carter BB, BB1, BB1A and BB1D updraft Carter BB for IHC BBD Place the choke housing toward the left and remove upper right main body to throttle body screw. Place the choke housing toward the left and remove upper right main body to throttle body screw. There should be a retainer keeping the check ball in place. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. Any bubbles indicates a leak.Make sure the 2 floats are the same height. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. *New Accelerator Pump5. What Has Been Done to This Carburetor?1. A WGD usually has a pump arm like that of a WCFB (IIRC). Rochester and Carter replacement parts are interchangeable. Notice holes from which linkage rods are removed so they can Probably not since only one butterfly is open. Can fill the accelerator chamber with a syringe (through top open passages of forward barrels where choke butterfly is) and the jets will spray gas into forward chambers (and will idle and accelerate for about 15 seconds)but when that gas is depleted, the spraying stops. Press down on vacuum piston link C until metering rods bottom in the carburetor body. 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. Make sure manifold heat control valve is free. To prevent fuel from being drawn through the pump circuit, the passage to the pump jets is vented by a cross passage to the carburetor bowl above the fuel level. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. Adjusting the WCFB float level and float drop. Be sure these ports are clear. If not, then find the check ball and make sure it is loose. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. Adjust by bending lip of float, not float arm. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. The float lifter spring also provides better float and fuel level stability when operating on rough, washboard type roads. The mixture screw may be bent, or damaged. WCFB carburetors, althqugh basically all units are allke. 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. 1st check to make sure the fast idle linkage isnt holding the valves open. Test the floats in hot water and if you get any bubbles then they are leaking. This restricts the flow of fuel. They are not meant to fill the hole, only to restrict it. Make sure the ball rattles. This spring is a bit complicated so this video will be very helpful when you change your spring.Find this WCFB spring here: https://www.carburetor-parts.com/wcfb-66d400.htmlFind WCFB parts here:https://www.carburetor-parts.com/wcfb-partscontents:00:0000:42 removing fast idle cam assembly00:56 taking the assembly apart piece by piece01:07 removing the old spring01:22 installing spring02:15 which direction does the pieces go?02:38 assembling the pieces03:16 installing the cam assembly onto the carburetor Do not depress float lip against spring in needle, but let float rest of its own weight. *New Main Body Gasket8. There may be a blockage in the accelerator pump circuit which would also make it hard to pump.What is the carburetor number so we can make sure you have the correct pump?Polish the pump well with crocus cloth. The WCFB carburetor which came on some of the earliest The most complete document I have found. This allows air instead of fuel to be drawn off the pump jets. Secondarys are somehow stuck open (which amounts to a vacuum leak). The flat on top of the pump arm should be parallel to the straight edge. Carter WCFB Metering Rods 4,292 views Jul 15, 2018 28 Dislike Share Save Mikes Carburetor 18.7K subscribers https://www.carburetor-part.com is providing this video about the Carter WCFB 4. You are flooding (getting too much gas in the float bowl), caused by these types of problems. You will need to check your motors manual for the spec, but around 4 or 5 should be plenty. Must be made after fast idle adjustment. Fig. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? Recheck float adjustments. Test the fuel pump to be sure it isnt putting out too much pressure. Back out throttle screw so that the throttle valve close completly. features a Carter carburetor identification page and a function that allows you to conduct a search by entering an identification number Factory Carter AFB CFM Ratings Chart Rebuild pics The April 15th, 2019 - The carbs with 1 1 4 venturies and 1 7 16 primary bores and 1 11 16 Ethanol gas does not have much if any lubrication. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards.