Carter yf metering rod adjustment before several times, and had shops Carter YF & YFA Technical Carter YF Rebuild Instructions Carter YF Carburetor Specifications Carter YF Troubleshooting YF Check Weight Lack of Power YF, YFA Jet Sizes YF YFA Idle Circuit Carter YF Float Level Adjustment Guide | Step-by-Step Instructions YF Choke System YF Metering Rod Adjustment Fuel Bowl Vent Adjustment Accelerator Pump Aug 16, 2003 · Modifications and Maintenance The YF is quite versatile for altitude. 157" Quantity: 1 Power Piston Metering Adjustment Screw allows adjustment of height of primary metering rods within… see more https://www. Most YFA carburetors would have the star type of adjusting screw. Any suggestions or would I be better off to just replace with a solex or something similiar. C. Metering rod jet seems to be adjusted correctly, and pump Adjusting the Carter YF Metering Rod Mikes Carburetor Parts Carter Yf Carburetor Idle Adjustment Factory rebuilding instructions, exploded views, part #'s, and tuning tips for the carter yf & yfa carburetors. Install bowl cover and air horn Carter YF/YFA metering rod adjustment: With throttle valve seated in bore of carburetor, press down on upper end of diaphragm shaft until diaphragm bottoms in vacuum chamber. Adjustments are described for the float level, idle speed, metering rod, and fast idle settings Nov 17, 2009 · 1967 - 1972 F-100 & Larger F-Series Trucks - Carter YF ? - I have a 300 with a YF on it that runs way rich. The controller can only make it leaner, not richer, so jetting still matters. Now when you make your metering rod adjustment, the tip of the rod is supposed to seat (gently now) in the bottom of the fuel well below the main jet. Carter released different metering rods for those who live (or play) above 4000 feet. Could someone identify the holes i numbered? Back out idle speed screw; The main metering rod adjustment is necessary on this design. Hold throttle valves Closed Measure bowl vent spec. 10" Thread diameter: . 780, but at that msmt the truck sputters. This essential step helps ensure proper fuel metering and engine perfo Apr 23, 2008 · 9 Jun 19, 2009 09:18 PM Tags 1bbl, accelerator, adjustment, carb, carbs, carburetor, carter, diagram, ford, lines, metering, pump, rebuilt, rod, vacuum, yf Back to Subforum View Next Unread. Here are photos of the installation. Carburetor tag E4TE AAA B4 B23. Under any operating condition, when the tension of the lower pump diaphragm spring overcomes the pull of vacuum under the diaphragm, the metering rod will move toward the wide open throttle or power posi tion. It runs well to about 12,000ft. 0935" would use a 75-1570 metering rod for 65 net flywheel hp. Air horn contains choke assembly, bowl vents, fuel inlet, float assembly, and solenoid (if equipped). You can find parts for this carburetor at Mike's The Carter YF and YFA carbuetors are made up of three main assemblies; air horn, main body, and throttle body. Wit throttle valve seated, press down on upper end of diaphragm shaft, Meter- ing rod should be seated in casting and metering rod arm flat against pump lifter link (C). Turning the Jun 29, 2018 · Master Carter Carburetor Repair Kit for Carter WO Complete with gaskets, small parts, linkage, metering rods and jets to rebuild your original Carter carburetor. c Oct 16, 2020 · 1967 - 1972 F-100 & Larger F-Series Trucks - Carter YF/YFA Jets & Metering Rods - Anyone out there know what the stock YF & YFA main jet and metering rods size was? I have seen . carter yf & yfa carburetor adjustment including float level, float drop, metering rod and pump adjustment. Jun 29, 2018 · To adjust the metering rod, back out throttle lever adjusting screw "C", Fig. The cut-sheet said adjust the float to . The use of three different setting tools is compared here. Learn how to properly adjust the idle mixture on a Carter YF carburetor in this step-by-step video. I've played around with the rods in quite a few Carters. Application: 4-134 L engine Helpful Guides and Illustrations: Fuel Servicing and Adjustment Fuel System Illustrations Fits: 41-45 MB 41-45 GPW 46-49 CJ-2A 49-53 CJ-3A 46-49 Truck 46-49 Station Wagon Station Springs - Carburetor Parts & Kits for Rochester, Carter, Holley, Edelbrock, Ford Motorcraft QJet, 4G, 2G, Mercarb Marine, AFB, AVS Thermo-Quad Carburetors YF, YFA Jets & Metering Rods - Carburetor Parts & Kits for Rochester, Carter, Holley, Edelbrock, Ford Motorcraft QJet, 4G, 2G, Mercarb Marine, AFB, AVS Thermo-Quad Carburetors BOTTOMS Q) BACK HOLD OUT THROTTLE IDLE ADJUSTMENT CONTACTS SCREW IN IN TURN ONE LIFTER METERING ROD ADJUSTMENT FIG, } ©To CHOKE ADJUST PISTON BEND LEVER Jan 2, 2011 · I live in Denver and frequent the mountains and I have read that there is are metering rods for the YF for elevations above 5,000'. The most obvious possibility was a bit of dirt lodged in the idle jet within the carb. ) While I had the carb apart, I also did the following: — replaced the float needle and seat with one having a larger inlet (again, it looked like it was set up for a smaller engine needing less fuel) Carter carburetor manuals, including 1, 2 and 4 barrel carburetors. Includes setting the float and metering rod settings. If the metering rod does not seat on the casting (check by pressing downward on metering rod) or seats before the metering rod arm makes flat contact with the pump lifter link, make adjustment by bending the lip on the metering rod arm. helpmycarb. Aug 8, 2021 · With the Carter WCD's, you leave the jets alone, and re-calibrate for altitude by simply changing metering rods, which may be accomplished without disassembly of the carburetor. 040 tip size metering rods on a few sites? Can not get on ford 6 site to ask question. Make sure to find out the correct clearance for your specific model. 9L / 300 - Metering Rod Adjustment on Carter Carb - I need help adjusting the metering rod on the Carter YFA 1-V carburetor on my 1984 full-size Bronco (300 cu in. Press down on diaphragm shaft until diaphragm bottoms. If it doesn't, you (ever so slightly and carefully) bend the thin metal between the main part of that metering rod bracket and the little portion that is holding the hoop of the upper metering rod. I have the manual available for you and have provided some photos from my own rebuild along with a few tips below. This is a diaphragm with manifold vacuum on bottom and fuel on the top side. 95 Specifications: Length: 1. In this tutorial, we'll guide you through the process of Oct 29, 2014 · Doug D's mob at The Slant Six forum has got all the 80 three step metering rods they commonly used, from the lean to rich, everything from the first year YF's from the early 50's in Willy's Jeeps to the YF common replacements. To adjust the metering rod, hold the diaphragm assembly then turn the rod adjustment screw until the metering rod just bottoms in the body casting. Please notice that this is a somewhat generic breakdown of the YF carburetor. 120, and close the throttle tight. I think it's running a little rich, so counter clockwise for lean Apr 13, 2022 · Carter BBD, 2 barrel carburetor adjustments. May 16, 2025 · Mike's - Carter YF/YFA idle vent adjustment This adjustment should be made after completing pump and metering rod adjustments. D2 prefix are all for 1972 engines; the only D2 carb showing for a 72 300 has a main jet of . asp?itemid=3140This video demonstrates how to install the metering rod spring on a Carter 1 barr The metering rod should now seat on casting with the metering ro:l arm flat against the pump lifter link. Install bowl cover and air horn assembly with gasket. After driving the truck some, I adjust the screw a turn or two, there are 10 turns in all. Aug 29, 2018 · (If anyone has a 75-1279 metering rod for a Carter YF they’d like to sell, or knows a good source or substitute for one, please let me know. Does Jun 29, 2018 · To adjust the metering rod, back out throttle lever adjusting screw "C", Fig. Running mixture is controlled by the metering rod. At idle, part throttle, or cruise conditions when manifold vacuum is high, the piston is drawn down into the vacuum cylinder, compressing the vacuum piston spring. ) Pump S asonal Setting - Standard setting is with pump connector rod engaged in center hole (Exc 3287SSA), inner hole (3287S. com/product. Apr 13, 2022 · The metering rod piston rides on a calibrated spring which attempts to keep the piston at the top of the cylinder. A secure, tight fitting power piston retainer will protect your primary metering rods from getting bent when installing the airhorn. The screw in the background raises and lowers the tapered rod in the jet. With throttle valve tightly closed in carburetor bore, there should be the clearance listed in your spec chart between idle vent valve and inside of bowl cover. 120, (supplied by Carter Carburetor Co. Carter Metering Rod Technology General What is "metering rod technology"? It is a method of changing the calibration of the carburetor in response to different stimuli by inserting a movable tapered rod through the main metering jet. We have jets available for most Carter carburetors. I soldered and redrilled my jet to a smaller size because it was too rich and wouldn't adjust, I would have to order new rods and jets, and I had to get it through emissions, but I have a heated O2 sensor and an air/fuel ratio monitor I built so I was able to monitor it closely and adjust it every couple Metering Rod Adjustment: Be sure flat of metering rod arm is parallel to flat of pump lifter link before proceeding with meterin rod adjustment. The carb is running rich, and the float is adjusted to . Gaskets Screws - YF &YFA Pump Diaphragm Parts Carter YF, YFA Metering Jets and Rods Check Balls and Weights Clips and Plugs - YF Filters and Hose And this is the adjustment About the only thing that will bite is the inclusion in some Ford YFA's of a Metering Rod Arm Plate, with a hole ID: . The effective calibration at any time would be the area of the jet less the area of the portion of the rod currently in the jet. Metering rod should Dec 28, 2008 · Ford Inline Six, 200, 250, 4. You can get a default Q2505-045 YF metering rod from the Quadrajet Parts Dec 23, 2011 · Comparing the metering rod setting tools In an effort to find the easiest or best way to set Apr 13, 2022 · Carter YF 1 barrel downdraft carburetor exploded view with parts list. It contains contact information at the top and then describes the various circuits that control fuel metering and delivery, including the float, low-speed, high-speed, choke, and accelerating pump circuits. Mostly these instructions are ignored on the assumption that if it was working May 21, 2017 · The 75-2189 was a valid metering rod on that table well. tied clearance Jun 29, 2018 · The metering rod should now seat on casting with the metering ro:l arm flat against the pump lifter link. I had the same problem running way too rich (I have the stock fuel pump). SEE PAGE 30 Jan 9, 2015 · The original rebuild guide from Mighty-Mo, RIP!http://mightymo. This should also not be confused with the Carter YFA carburetor. 105 - . I did not notice before disassembly that there were two different size springs on the accelerator pumps. YF, YFA Jets & Metering Rods - Carburetor Parts & Kits for Rochester, Carter, Holley, Edelbrock, Ford Motorcraft QJet, 4G, 2G, Mercarb Marine, AFB, AVS Thermo-Quad Carburetors BOTTOMS Q) BACK HOLD OUT THROTTLE IDLE ADJUSTMENT CONTACTS SCREW IN IN TURN ONE LIFTER METERING ROD ADJUSTMENT FIG, } ©To CHOKE ADJUST PISTON BEND LEVER Jan 2, 2011 · I live in Denver and frequent the mountains and I have read that there is are metering rods for the YF for elevations above 5,000'. Get parts here: https://www. Carter technical catalog. Turning this will change your mixture at idle only. Whilst following your adjustment instructions and when carrying out the metering rod adjustment,can you tell me if I should disconnect the link pump connector first. Aug 11, 2009 · I have had it back apart twice double checking the float adjustment and metering rod adjustment but still cannot get to run. Nov 16, 2012 · So which way makes it rich or lean? I rebuilt it and set it according to mike's carberator page, hold pump all he way down and turn unil the metering rod touches the floor of the carb, then turn an addition full turn clockwise. You can change a lot with just the metering rod adjustment. com is happy to provide you with a YF Carter carburetor rebuilding video. can someone explain how i do the metering rod adjustment for the YF, i just rebuilt it but dont know how to set it properly, the guide i had did it with the worst pictures couldnt see anything. Nov 23, 2008 · Thanks for reading! I drilled and tapped a hole above the metering rod adjustment so I can fiddle with it without pulling the carb off the manifold. Carter YF Carburetor Rebuild The rebuild of a Carter YF carburetor is actually fairly straightforward. The production model CJ-6 had the Carter YF-938SD carburetor superseding the earlier YF-938SC, YF-938SA, or YF-938S models. nq rod. Turning the idle adjustment May 12, 2025 · Mike's - Carter YF/YFA metering rod adjustment: With throttle valve seated in bore of carburetor, press down on upper end of diaphragm shaft until diaphragm bottoms in vacuum chamber. Carter BBD 2-BBL items fit too. REF# NOMENCLATURE PART# 66) IDLE NEEDLE CAP . With a rebuild kit you get a list of instructions on how to adjust the choke and metering rod. 9L / 300 - Help withCarter YF (Video) - Rebuilding my Carter YF 6425 today and I'm trying to get the metering rod assembled and adjusted. https://www. org/Proj_Carter_WO_Rebuild. Is this something that i should look into or since my system is more similar to fuel injection does it adjust all it needs to? Gasoline enters the idle wells through the main metering jets. All on-bench. It takes about 15 minutes to take apart, change jet, and reassemble. The YF design does have a weak accelerator pump system and needs regular rebuilds to avoid a big bog when you step on it. This clearance, shown as A in Fig. Rich warmup is probably a consequence of improper choke adjustment. 185" and overall length of 1. You can find parts for this carburetor at Mike's Jun 29, 2018 · To adjust the metering rod, back out throttle lever adjusting screw "C", Fig. ) loosen nut "B" and move pin until it seats in the notch of the gauge. Carter YF and YFA 1-Bbl. Most enthusiasts think that these rods differ in metering diameters only; but this is totally wrong. The carb does the metering, a hair on the rich side, and the controller fiddles the carb via that hated solenoid to make AFR be what I want. YF-series carburetors employ manual and vacuum control of the metering rod and accelerator pump. For these carburetors, Carter produced hundreds of different step-up rods. , straight 6 engine). BACK OUT ADJUSTMENT SCREW SO METERING ROD BOTTOMS IN METERING WELL. - T ADJUST TURN ADJUSTMEN SCREW IN UNTIL IT CONTACTS LIFTER LINK,THEN IN ONE ADDITIONAL TURN. Accelerator Pump (All GM & Checker Models) Bend Here to Aølust (Metering Rod AdluStment Metering Bend Connector Link to Adlust (Accelerator Pump Adlustment) Push Down on put-no Shatt (Accelerator Pump Adjustment) Metering Lift Link Support Lugs EARLY TYPE t Adjustrrmt made after adiustng accelerator pump and meter. Mike's Carburetor Parts is the number one carburetor parts & fuel injector supplier on the Internet. Gasoline enters the idle well through the metering rod jet. On a Jeep, a 120-166 main jet @ . Carter YF Service Manual Here is the Carter YF/YFA Service Manual #3608B, with explanation of how the various circuits work (theory of operation) including the only description of the operation of the feedback version of this carb I've ever seen (briefly Aug 29, 2018 · The metering rod moves up and down in the orifice of the jet, with the stepped thicknesses of the rod increasing or reducing the open area through which fuel can flow. Mar 16, 2009 · I have a M38A1 and are currently rebuilding the carb. Shows the assembly of the YF carburetor after it has b The Carter YFA is a fairly simple carburetor, which has one major weak point - the combination accelerator pump and metering rod control. Jan 13, 2021 · The early YF metering rods are adjusted by bending a tab on the rod top, the later YFA carbs have an adjusting screw to make the adjustment. Carter YF Carburetor Rebuild After a few false starts (such as rebuilding my vapor recovery canister) in figuring out why "Bob" was no longer idling properly (if at all), it became clear that a rebuild of the Carter YF carburetor was in order. We have carburetor kits, floats, choke thermostats and m Late Model YFA (aluminum base) How To Adjust Metering Rod The main metering rod adjustment is necessary on this design carburetor to ensure that the proper amount of fuel is allowed to enter the main well under various engine load conditions. Could anyone help? Carter YF Idle Mixture Adjustment Carter YF Carburetor Accelerator Pump Test Carter YF Common Flooding Causes How to Install the Metering Rod Spring – Carter YF Carburetor Sep 20, 2010 · The YF metering rod system is similiar to Carter's AFB design. Application: 4-134 L engine Helpful Guides and Illustrations: Fuel Servicing and Adjustment Fuel System Illustrations Fits: 41-45 MB 41-45 GPW 46-49 CJ-2A 49-53 CJ-3A 46-49 Truck 46-49 Station Wagon Station Springs - Carburetor Parts & Kits for Rochester, Carter, Holley, Edelbrock, Ford Motorcraft QJet, 4G, 2G, Mercarb Marine, AFB, AVS Thermo-Quad Carburetors Carter WD-0 2 Barrel Carburetor High Speed Circuit The intermediate and high speed circuit consists of the metering rod, main jet, nozzle, anti percolator, anti percolator arm assembly, vacuum piston & link assembly. Raising it will fatten up the part throttle mixture without fattening up the WOT mixture, which I suspect is not too lean anyway. The height of the metering rod in a Carter WO carburetor can be set by using a special tool designed for this purpose. Carter YF and YFA, 1-barrel carburetor metering jets. When I took the carb apart it was missing the spring so I had to order one. Jan 1, 2010 · I seem to remember those Carter YFs tended to run rich because the metering rod was not adjusted properly. Troubleshooting information for all Carter carburetors. Look in our YF carburetor manual and go over the metering rod adjustment. Carter YF & YFA Metering Rod Adjustment Late Model YFA (aluminum base) How To Adjust Metering Rod The main metering rod adjustment is necessary on this design I'm back on loving Carter YFs on rambler sixes, after my brush with the unreliable bureaucracy Apr 16, 2023 · Carter YF/YFA carburetor tuning: jets and rods (aka performance chipping) 16 apr 2023 Tuning the YF/YFA requires taking the top of the carb off, removing the metering rod assembly (don't let the spring or clip escape) and unscrewing the jet from it's well. Carter made 2 step, 3 step, and 4 step rods. Save your rods, replace your PP-retainer today! - The long answer: Carter made 505 different AFB carburetors (I don't count the imitations). You can do it on the car. thanks USA made power piston retainer bushing and power piston tuning spring kit are two of our most popular products. When similar gaskets or parts are included in the kit, compare with original parts, Carter Carburetor Model: YF DISASSEMBLY Rest the carburetor on a repair stand to avoid damage to the throttle plate during renew procedures. It has always fixed any YF mixture issues I've seen. 110", all the rest (four) are for 240's, Unlock the full potential of your engine with our comprehensive tutorial on metering rod adjustment for the Carter YH 1 barrel carburetor. May 12, 2025 · Mike's - Carter YF/YFA metering rod adjustment: With throttle valve seated in bore of carburetor, press down on upper end of diaphragm shaft until diaphragm bottoms in vacuum chamber. The two carbs seem very similar to one another although the top of the rod seems more accsessable on the WO. the Carter/Carter-Weber YF and YFA carburetors are: • Fewer moving parts-readily accessible and easy to service. This document provides information about servicing and adjusting a Carter YF carburetor. Using gauge T-109-26, Fig. Feb 14, 2016 · Before changing jets I would try the metering rod adjustment. YFA models have a choke hot air inlet adaptor and an externally-mounted choke pull-down diaphragm. What jet and rod should it have? will the metering rod adjustment efect the idle circuit? The idle bleed screw makes little difference from seated to removed. Whether you're fine-tuning for a smoother idle, better fu Carter YF & YFA Metering Rod Adjustment Late Model YFA (aluminum base) How To Adjust Metering Rod The main metering rod adjustment is necessary on this design Thanks frank and Joe!I found that you can at least guesstimate fairly well how much of a change, percentage Carter Carburetor Adjustment Screws. The air horn contains the choke plate, internal vent for fuel bowl, automatic choke control with electric assist (if equipped) and float assembly. com is happy to provide this informational video about the YFA metering rod adjustment. Carburetor shown is a Reproduction Carter WO 539S Buy this spring at: https://www. The low speed jets lI\ea sure the amount of fuel for idle and early part throttle operation. Carter YF Service Manual Here is the Carter YF/YFA Service Manual #3608B, with explanation of how the various circuits work (theory of operation) including the only description of the operation of the feedback version of this carb I've ever seen (briefly Apr 16, 2023 · The metering rod was not stamped with a part number, but is quite close in specs to the 74-2171 part. History As best I can determine Initial adjustments and checks of the WO Carburetor. Obtain a 10 x 32 machine screw and spring. • Compact idle system to provide smooth engine idle under all driving conditions. com is happy to provide this information video about the Carter WCD Carburetor. The metering rod does not fit tight. Metering rod should contact bottom of metering rod well, and metering arm should contact lifter link at the outer end nearest the springs and at supporting lug. The low-speed jet measures the amount of fuel for idle and early part throttle operation. Mar 28, 2003 · The metering rods are different, they work exactly the same but mount totally different. Your YF may differ in some places. Includes base gasket. A single diaphragm which controls both meterinl rod position and pump discharge provides not only instantaneous metering response through the high speed circuit but also controls pump discharge commensurate with the load and peed demands of the engine. Turning the idle adjustment Jan 27, 2014 · When I asked around the forum about jets, I kept getting the same answer: adjust the metering rod (mine is the "bent tab" type; apparently some YF's had an adjustment screw inside the carb. Run thin wire down the hole to clear out any ethanol Thanks frank and Joe!I found that you can at least guesstimate fairly well how much of a change, percentage Apr 16, 2023 · The metering rod was not stamped with a part number, but is quite close in specs to the 74-2171 part. drill through the dimple using a number 21 drill, and tap for a number 10 x 32 machine screw. com Parts are available at Jan 1, 2010 · I seem to remember those Carter YFs tended to run rich because the metering rod was not adjusted properly. com is providing this video about adjusting the metering rod on the YF & YFA carburetor. 123, can be measured by a gauge. Buy parts for the YFA here: https://www. This is on an Carter YF/YFA idle vent adjustment This adjustment should be made after completing pump and metering rod adjustments. The low-speed jet meas ures the amount of fuel for idle and early part throttle operation. carburetor- Apr 13, 2022 · Carter YF & YFA carburetor adjustment including float level, float drop, metering rod and pump adjustment. com Parts are available at the Carter/Carter-Weber YF and YFA carburetors are: • Fewer moving parts-readily accessible and easy to service. Carter Yf Metering Rod Adjustment. Percolating - Engine stops and gas boils over - After turning off the hot engine look down the carburetor to see if gas is still flowing into the bore. Access our complete technical catalog at www. Adjust float, choke and many other adjustments. https://www. How to adjust the metering rod on your Carter YF or YFA carburetor. The air by-pass passages, economizers and idle air bleeds are carefully calibrated and serve to break up the liqUid fuel and mix it with air as it moves through the passages to the idle ports and idle adjust ment screw ports. Rebuilding instructions, specifications and troubleshooting. Learn the correct method to install the metering rod spring in a Carter YF carburetor. This is normal for the Carter YF & YFA. • Diaphragm operated metering rod, both vacuum and mechanically controlled-compensates automatically for added road load requirements. SA) of throttle lever Mar 17, 2019 · Carter YF idle issues after recent adjustments « Prev 1 2 Next » Reply Quick Reply Guest Name: Apr 26, 2016 · 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - Carter Metering rod spring help - Hello I am rebuilding my carter yfa one barrel carburetor and I can't figure out how to orient the metering rod spring on the metering rod. Learn how to make proper adjustments to Carter YF and YFA carburetors, including float level, idle mixture, and choke settings for optimal performance. Carter yf & yfa carburetor adjustment including float level, float drop, metering rod and pump adjustment. htmlAnother Aug 27, 2021 · How to adjust the metering rod on your Carter YF or YFA carburetor. Install the carburetor air horn and a new gasket on the carburetor. carburetor-parts. Turning the Jan 30, 2002 · I was playing around with my YF carter 1 bbl, and was puzzled with the Metering Rod and Jet combination. Carter normally specifies that the metering rod be bottomed all the way down when the throttle is closed, but adjusting the rod higher than that will richen your light to medium throttle while leaving your heavy throttle and WOT A new innovation in method of metering rod and pump control is brought out in the model YF carbu etor. Available in a variety of sizes. I?ve successfully rebuilt the carb. Also, there is a great section on the Carter YF carburetor within the Truck Service Manual itself, in the Fuel System section. Form LZJW 98 to 110 are valid main jet sizes. Adjust the level by bending the float arm lip that contacts the needle (not the arm) to provide specified clearance between the float and cover. Jun 29, 2018 · Master Carter Carburetor Repair Kit for Carter WO Complete with gaskets, small parts, linkage, metering rods and jets to rebuild your original Carter carburetor. there is no exact adjustment of the idle mixture screws while the carburetor Carter YF Carburetors: Descriptions and repair procedures given in the following paragraphs apply equally to all YF-series carburetors. Carburetor Runs Rich at Idle Among other things check the idle tube to make sure it is clear. May 9, 2015 · If, say, the metering rod became unmoored from the pump lifter, it would presumably restrict the flow of gas to the carb in open throttle situations, while the low speed and idle circuits would still work as usual. The carburetor controls and vaporizes the fuel through five separate circuits: float circuit, low speed circuit, high-speed circuit, choke circuit, and BLUE ITALICISED PN's AVAILABLE ONLY IN STRIP KIT, OTHERS AVAILABLE SEPARATELY net areas of orifices in square inches x 105 Power Piston (APT) Metering Adjustment Screw $9. Turn the metering rod adjustment screw in (clockwise) one additional turn for the final adjustment. Jan 5, 2012 · Carl, I'm going to rebuild a Carter YF this winter and I hope to be able to use your method to set the metering rod. It is built to restrict a certain amount of fuel, not to shut if off. May 30, 2022 · The metering rod fits too loose in the main jet. 650. These are the air/fuel mixture screws. Still don't have the YF & YFA metering rod number & tip size? Jun 13, 2004 · The "air/fuel" screw is the idle mixture adustment. 110 main jet sizes & . 050" Feb 23, 2004 · I adjusted the Napa kit for my '73 Carter YF on a 258 to exactly the same point you are describing -- very near the inner end of the possible adjustment. The main body consists of metering rod and jet, accelerator pump assembly Jun 18, 2006 · Ford Inline Six, 200, 250, 4. How do they affect fuel delivery and could I gain performance with an adjustment? Also If you change the Jet do you need to change the Rod to match, or is the "one rod fits all" concept used. The rod assembly goes over the post (A) and https://www. The air by-pass, econo mizer, and idle air bleed are care fully calibrated and serve to break up the liquid fuel and mix it with air as it moves through the passage to the idle port and idle adjustment screw port. carburetors are made up of three major assemblies; air horn, main body and throttle body. Apr 10, 2016 · The adjustment below is for early Carter YF carburetors that don’t have an adjusting screw at the top of the metering rod. The picture above show the dimensions of correct metering rod (#75-1279) for the Carter YF carburetor (model #2467S) specified for use on the L6-226 Super Hurricane. This belief was further reinforced as I read the Jeep Forum posts Carter WO Carburetor Initial Adjustment And Checks G503 Willys MB CJ2a and Ford GPW, A1223 1981Jeep accelerator pump and choke circuit on Carter BBD carburetor. CARTER BBS SINGLE BARREL CARBURETORS (C nt. REASSEMBLE IN REVERSE ORDER OF DISASSEMBLY, NOTE: SPECIAL INSTRUCTIONS ANO FOLLOW NUMERICAL OUTLINE IN MAKING ADJUST MENTS NECESSARY FOR CARBURETOR BEING SERVICED. The air by-pass, economizer, and idle air bleed are care fully calibrated and serve to break up the liquid fuel and mix it with air as it moves through the passage to the idle port and idle adjustment screw port. rlto wul sbmg xmu myber rfukqeq kam ywlep pxumlz tetyy tqfg brn srw iemri uoq