Does anyone have a recommendation for a replacement carb for the original Marvel on a '47 8N? E3Check the float adjustment while holding the top of carb upside down. With those installed, that leaves only the Power jet which goes in the lower half of the carb under the Main Nozzle. Then, the idle screw must be backed off until the throttle plate is tight. 9Air Compressor or perhaps canned compressed air to blow out and dry passages. The shaft and blade should fit snugly in the hole and in the jet slots. Rubber gloves may be needed depending on what you use for solvents/cleaners, skin sensitivity, and how hands-on you tend to get with that stuff. Alcohol blended fuel throws another wrench into the works because the alcohol part is only about half as volatile as gasoline. Something went wrong. D2Some of the passages in these carbs may never have been completely drilled out and many of the jets being provided in kits are the wrong size for a Ford tractor. Soak the area in PB Blaster first. All of the new float seats I've installed seemed very hard to get all the way down. There seems to be a problem serving the request at this time, {"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}. Once youve removed the float, remove the seat. The air filter is a very common problem in Ford tractors, but it is an easy fix. Our new carburetor includes the mounting gasket. C2Before taking them back to the workbench, get the carb halves and other parts as clean as you can inside and out. Pick a new, sharp or specially ground screwdriver that fits tightly in the screw slot. If the screws are too short to crimp, I start rummaging in my spare parts for replacements that are longer. The actual fractional dimensions closest to the decimal tolerances are 17/64" and 19/64". The engine will still start, adjust, and run well. If you cant find a replacement shaft, you can purchase a new one. Idle Jet = 9N/8N 9596 M/S #49-165 #10-32 Thread The new design had enlarged pistons and reverse idler gears. It will come out using the proper size screwdriver. Cleaning is absolutely the most critical part of any carb rebuild, and where most failures occur. The tapered part should be at the top when the carb is assembled. This is an idle "air" adjustment, so it works backwards from practically any other carb on the planet. Make sure the float pivot pin hasn't slid off one side. Bending a slight turn in the leading end of the wire will help get it around corners. You may need to tap the hole in the top plate to accept the econ jet. Fuel Limiting Jet fits Marvel Schebler Carburetors for Ford Models 9N, 2N and 8N, Choke Retainer Spring for Ford Models 9N, 2N and 8N, Choke Lever and Shaft for Ford Models 9N, 2N and 8N, Main Adjusting Needle fits Marvel Schebler Carburetors for Ford 9N, 2N and 8N, Throttle Shaft & Lever fits Marvel Schebler Carburetors for Ford 9N, 2N and 8N, Idle Jet fits Marvel Schebler Carburetors for Ford 9N, 2N, 8N and More, Idle Jet for Marvel Schebler Carburetors for Ford Model 8N, Main Carb Nozzle Washer for Ford Models 9N, 2N and 8N with Marvel Schebler, Economizer Jet for Marvel Schebler Carburetors for Ford Models 9N, 2N and 8N, Venturi for Massey Harris 101 Jr, Ford 9N, 2N, 8N, John Deere L, LI and More, Choke Poppet Valve Spring for Ford Models 9N, NAA and More, Main Needle Spring fits Marvel Schebler Carburetors for Ford 9N, 601, 821 and More, Throttle Shaft Seal fits Marvel Schebler Carburetors for Ford 9N, 700, 940 and More, Choke Shaft Felt Packing Retainer for Ford Models 9N and More, Idle Adjusting Needle fits Marvel Schebler Carburetors for Ford 9N and More, Float Valve Seat Gasket fits Marvel Schebler Carburetors for Ford 9N, 611 and More, Throttle Shaft Brass Retainer fits Marvel Schebler Carburetors for Ford 9N, 501 and More, Carburetor Mounting Stud Kit for Ford Models 9N, NAA, 600, 1801 Industrial, 4140 and More, Carburetor Stud Only for Ford Models 9N, 2N, NAA, 1801 Industrial, 4040 and More, Throttle Body To Bowl Gasket fits Ford Tractors with Small Bowl Marvel Schebler Carburetors, Address : 3715 Highway 71 Coushatta, LA 71019. B3Check the choke and throttle shafts for side play in the carb body. The throttle shaft should have a neoprene seal. Does anyone have any experience with the Zenith? Some floats and valves will use a small clip to help the float pull the valve out of the seat. Never assume the carb was right to begin with, especially with aftermarket replacements. We sell fuel tank sealer, NR1251& NR1259. It was definitely NOT worth the $162 I paid for it. Please be patient during this time. We will see why in a minute. If not, make sure it isn't broken off and wadded up inside the carb. We sell fuel tank sealer,NR1251&NR1259. None of the jets would come out either. If its too short, it is time to replace it. Monday-Friday 7:30 AM - 5:00 PM | Saturday 7:30 AM - 12:00 PM | Sunday CLOSED. Occasionally, things will be so corroded the only option is to drill out the old material, and pick threads clear. 6Set of Taps8-32 UNC, 10-32 UNF, 12-24 UNC, 1/4-28 UNF, 1/4-40 UNS, 1/8-27 NPTF, 1/8-27 NPS All of the passages need to be checked, cleaned and possibly drilled out to a size that is larger than the jet. D1Repeat the entire cleaning process. It may take a little prying to free the manifold gasket. The choke shaft should be accessible once you remove the gas tank. B4Carefully pry the shaft seals out of the holes with a Pick Tool. The photos can save a lot of head-scratching later. The inside does not look any better. To replace the shaft of the carburetor, you must first remove the idle screw and then insert the throttle plate. D4A selection of old wire guitar string in various thicknesses comes in handy for cleaning out passages. You can also replace the bushings separately if the shaft is in poor condition. If a kit has new jets, verify that the new jets have the correct size hole before discarding any old jets. E2Install the correct jet into each hole. Some skip it, but it's impossible to get all those little passages completely clean without removing the Main Nozzle and jets. Usually found at hobby supply stores. 8Precision measuring tool to measure bit and wire sizes. Ford soon issued Service Bulletin 118 with instructions to re-install the econ jet and restore the "241C" carbs back to "241B" specifications. Any jet smaller than the minimum sizes listed in bold can be drilled out using a pin vise and the appropriate bit. Remove the carb drain bolt and let it drain into the can. Alternatively, you can purchase separate bushings. I've never had one of those little screws in the throttle plates come loose, but I have seen what a small screw like that can do to the inside of a cylinder. However, new shafts may be all you need. The carburetor shaft often requires the most maintenance. However, the carburetor can wear out over time, which means youll have to replace it. The N is known to overheat and the problem is typically caused by an overfilled radiator. If the hole is noticably oval, new bushings are required. C7The other two jets are in the carb top. recommended by Ford. This fitting is soft and easily bent. Unfortunately, this carburetor willnotfit overhead valve engines or Ferguson tractors. B5Carefully unscrew the fuel elbow fitting. Finally, install the shaft adjustment screws. After that, youre ready to use your tractor. Don't force them, but make sure you are at the limit of travel. After way too many hours researching jet sizes, then rebuilding and testing a few carbs, it seems that almost any size jets can be used. Murphy can really test your patience sometimes. Remove the washer seal where the main mixture screw went into the carb. I find it easiest to use a smooth dowel and estimate that last 1/32". is found in the carburetor or if it has been taken apart. You can easily remove the air filter housing from your tractor by unbolting two bolts and loosening the clamps on the air pipe. Bushings are not provided in kits, but are available separately. Nearly all of the M/S type carbs can be rebuilt to the TSX-241B specifications. You should now have a saw horse ready to place on the hood. E7If you took the shafts out, reassemble shafts, plates, shaft seals, and finally install the mixture adjustment screws. Putting new parts in a dirty carb often does not have the desired results. Some people claim the Zenith is an upgrade. This isn't a huge issue. Come join the discussion about farming, lawn maintenance, restoration, modifications, classifieds, troubleshooting, maintenance, and more! The pump base on the 8N was cast iron. This rebuild is based on the original type Marvel/Schebler Carburetor. A large screwdriver or even a dime gripped in vice grips, can work as well. You can purchase replacement bushings separately, but you may need to drill and install new ones, as well. A tight-fitting open-end wrench may work ok, as long as the nut wasn't previously tightened by a gorilla. A friend suggested soaking carbs in vinegar for a few days, then soaking in mineral spirits for a few days. To replace the oil seals, the first step is to remove the lubricant from the oil filter and clean it. Required fields are marked *. There is a Basic Kit that should sell for around half what the complete kit costs. In this case, count turns OUT until the throttle plate is completely closed. for the 9N and the last TSC-241B spec. This one is missing the choke shaft, and judging by the hole where the shaft should be, it will need new shaft bushings. This is especially true when mission creep sets in, and it's over a year later that you are putting things back together (hint hint). Hopefully the screws have at least one thread out past the back side of the shaft. 4Pin ViseA very small drill bit holder. If you want to know how to replace the choke shaft on an 8n Ford tractor, you have come to the right place. These are pressure-balanced type carbs, so the engine draws what it needs at the ratio you adjust using the Idle Mixture and Main Mixture screws. The 241B spec for idle jet is definitely a minimum size to make sure the engine can pull sufficient fuel thru the idle passages. The hydraulic pump was also changed to the new style, which was installed on the new Jubilee. Some damaged parts can be salvaged. We also offer a new fuel tank,9N9002. If you cant find the carburetor solvent, you can use compressed air to clean the castings. Carefully remove two screws that hold each plate to the shaft. Most of the wear is often in the shaft, so new shafts and seals might be all you need. Hey guys we'er talking the 1940's here!! A forum community dedicated to all tractor owners and enthusiasts. KEEP THE OLD JETS! Look down in the hole with a brite light and make sure there is a jet installed. The studs should stay in the carb. is in dyer straights but do you think you may be able to take it to a machine shop and see if they can remove the easy out and insert? Careful even pressure will release the soft metal jet from the threads in the carb casting without damage. B2Check the idle speed screw. Mission creep strikes again. JavaScript seems to be disabled in your browser. There are several components that make up a tractors carburetor, so choosing the best one is essential for the tractors engine. When the fuel stops, this should confirm that your fuel valve at the tank actually closes off the fuel completely. If your tractor wont start, it might be time to replace the float valve seat. There is no substitute for a screwdriver specially-ground to fit. You can also clean the air tube with sandpaper. Aftermarket carburetors are available, but they are often in poor condition. A4Next remove the linkage and air tube. The rebuild kits have introduced even more variations. I believe the new seats are being made with a thread spec that is "close" but not exactly right. That may be true for an original carb that was built to specifications, but completely false for many replacements. D3Some people find it necessary to remove the casting plugs to clean and check some passages. That is good, there are plenty of used carbs, and replacement parts available. If these components are damaged, you can replace them with the appropriate parts. If you don't have access to shop equipment like that, these carb parts can be carefully drilled-out by hand. 138 product ratings - New Carburetor For Ford Tractor 2N 8N 9N Heavy Duty 8N9510C-HD Marvel Schebler, 7 product ratings - Brand New Carburetor w/ Gasket For Ford Tractor 2N 8N 9N Heavy Duty 8N9510C-HD, 12 product ratings - HEAVY DUTY CARBURETOR FOR FORD TRACTOR 2N 8N 9N TSX33 8N9510C-HD MARVEL SCHEBLER, 1 product ratings - Carb Screen Carburetor Fuel Elbow Strainer Fits Ford Tractor 2N 8N 9N NAA NAB 60, 1 product ratings - Carburetor Rebuild Kit for Ford 2N 8N 9N IH Farmall 100 130 140 200 230. Replace the filter in the same manner. You may substitute gasoline. The Idle Jet is easily visible near the float seat. If the old neoprene seal has deep scratches, it will eat into the new neoprene seal and leak more than ever. Most of the ones on ebay look like generic imports. Many of the replacement carbs may not have been made for a Ford tractor. Don't worry about it too much. Often, the new seat wont fit properly, so be sure to follow the manufacturers instructions. The sizes listed in bold text above are the original TSX-33 spec. Once this is done, you can install the new air tube. I keep a few old fuel line fitting nuts around so I can twist one in the elbow to help support the fitting before putting a wrench on it. E5Place the venturi into the top cover gasket. The serial number of the tractor you are working on should indicate the year it was built. All Tradenames and Trademarks referred to on these web pages are the property of their respective trademark holders. View cart for details. The idea is to remove the jet without having to drill and tap the remains out after wringing the top off. 2GrinderAny type that you can use to make special tools. Hold the screwdriver squarely in the slot. C1At this point there is still some disassembly to do, but my workbench is covered in dirt, grime, and bits of old paint. The screws for this part are usually located in the shaft and can be easily removed with a screwdriver. If your tank is rusting then this will contaminate your fuel. Many of these tractors have new aftermarket M/S type or replacement Zenith Carbs. You may need a neighbors help to disconnect the fuel line and the light wire. JavaScript is disabled. The inside diameter should be 1.5 inches. 1Special ScrewdriversCollect 2 or 3 old useless straight blade screwdrivers and an old dull flat file about 1/2" wide. Sizes Found = 0.026 [0.043] 0.046 (TSX-241B 0.050) 0.051 0.053 0.073. Snug the Main Nozzle down with the deep socket. Too big is much better than too small. The throttle plate and shaft are brass, so those came out easy. This requires drilling the casting out to accept the new bushings. Fits 2N, 8N, & 9N only. TIP:This is something that is more likely to be a problem with other vehicles, where the carb mounts on top of the engine. If that isn't an option, Loctite, or even a dab of epoxy, might be used for insurance. Start with the top cover. Alternatively, you can replace the seals with genuine Ford tractor oil and grease. Once screws are out, remove the plates, and slide the shafts out. Marvel Schebler Style Carburetor for Ford Models 9N, 2N and 8N, Skip to the beginning of the images gallery. I've found this is usually nearly impossible to get wrong.

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