Can't find the answer you're looking for? Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. Home - Carburetor Manual Ebooks Place the choke housing toward the left and remove upper right main body to throttle body screw. Did the old gasket get removed? As for the pump not squirting.I suspect the pump well isnt filling up. 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. When that is the case, I bend the accel. 19591961 Chevrolet Carter WCFB Carburetor All These Part Numbers Interchange Into Our Part No. Fast Idle or Idle at Cold Start has to be One of the More Important Adjustments on the Carburetor. This is an electronic rebuild manual, no physical copy will be provided. Reinstall carburetor, align and readjust inter connecting rod to manufacturers specifications. Make sure the air cleaner gasket does not block the bowl vents. 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. 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. 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. Back off the idle screw so that the throttle plates close completely. Ethanol gas does not have much if any lubrication. As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. The ends of the connector rod should point to the throttle arm side. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. 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 Metering Rod - Mikes Carburetor Parts parts. 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. If adjustment is required, remove dust cover and bend arm that operates the vent mechanism. 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. Some have a coating to give it a better shelf life. 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. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. The file is in PDF format, you can download and save/print a copy. Be careful when removing the top of the carburetor that you don't force things and break the piston lever. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. Back out throttle lever set screw until throttle valves seat in bores of carburetor. With mineral spirits in the float bowl, Raise the pump. How to Modify a Carter or Edelbrock Carburetor - Muscle Car DIY 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. Share. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. Note te larger box, and the number of additional tools from the 1935 set. You need to run wire down all small passages. Carter WCFB Accelerator Pump Quick test to see if the accelerator pump is working. The well should fill with fluid. This restricts the flow of fuel. Adjust by bending float arms, making sure both pontoons on each float are the same height. They work fine when I push hard down on the piston. Secondarys are somehow stuck open (which amounts to a vacuum leak). Both valves should be closed. 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. Look for breaks in the new gasket, or cracks around the threaded area.The needle could have been damaged while adjusting the floats. Buy REMANUFACTURED CARTER WCFB CARBURETOR 3696S For 1958-1965 Chevrolet Corvette 327 348: Carburetors . When replacing them hold them tight against the wall while tightening the screw. This can be done by looking at the impression on bowl cover gasket. Gasket between bowl and base is installed backwards (easy to do). Anti-Rust "Dichromate" Finish**4. The accelerator pump circuit resides on the primary side of this carburetor. To correct, remove carburetor and turn it upside down. Older kits 30-70s. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. Blowing out passages will not get them clean enough. The suction along with the fuel weight pulls fuel through the intake check via the passage to the fuel bowl. GM Corvette 1963-1982 Idle Speed and Mixture Repair Guide 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. 1: Carter WCFB idle mixture and speed adustment screw location. Test the fuel pump to be sure it isnt putting out too much pressure. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. Do not depress float lip against spring in needle, but let float rest of its own weight. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Seat the discharge check by tapping lightly in the hole to form a good seal. This is percolation. Put a straight edge across the dust cover as illustrated. Put some fluid in theaccelerator pumpwell and press down on the pump. Readjust dashpot plunger to move 1/16 inch on closing of throttle valves. Adjust by bending the choke connector rod at lower angle (H). The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . BBS) and were basically an on/off condition similar to the function of a power valve. 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. Press down on vacuum piston link C until metering rods bottom in the carburetor body. You should feel some pressure and fluid should not be bypassing the check needle. 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? 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. Though fuel float bowl full, cant get gas into the accelerator pump chamber of the carb. If not, then find the check ball and make sure it is loose. *New Float6. Disassembly2. Technical Details. Adjust by bending the connector rod at the lower bend (E). 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. Can't find the answer you're looking for. The Carter AFB uses weights, and therefore never goes out of adjustment. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. Carter Carburetor Manual Adjust by bending throttle connector rod at deepest angle as shown. Then close throttle. They are not meant to fill the hole, only to restrict it. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. In this video I show you how to replace the fast idle spring on the WCFB carburetor. Air Bled has the venturi tube pointing down into the bore. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. Metering rods for the WCFB have been out of production for several years now. The download link will expire in 30 days. The setups data is the same. The flat surface of the pump arm should be parallel to the straight edge. Adjust by bending throttle connector rod at upper angle (B). When I slow down to an idle, my engine runs rough. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). How To Replace the Carter WCFB 4 Barrel Fast Idle Spring? The fuel is also conducted through a passage in the air horn to the secondary needle seat. Carter WCFB 4 Barrel Carburetor Float System. Fig. 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. 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. I purchased from you a rebuild kit for Carter WCFB 4 barrel carb on my 1955 Chev. 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. Adjust idle screws D to produce a smooth idle of correct speed is obtained. When looking to replace your metering rod keep in mind that Carter used several different lengths of rods in the WCFB. Adjusting the WCFB float level and float drop. b. 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 Your friend will receive an email from you with a link to our site. Take the top off and put the pump in the well all the way to the bottom. Check any vents to make sure they are open. I. DISASSEMBLY. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. Pulloffs : CUFWCFB2 $ 0 . Clogged idle tube, or passages in the idle circuit.
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