D4A selection of old wire guitar string in various thicknesses comes in handy for cleaning out passages. This fitting is soft and easily bent. The rear lift arms were also beefed up. The Economizer jet and the Power jet are threaded the same, but the larger head on the Power jet should not allow it to drop into the hole in the top cover where the Economizer jet goes. I believe the new seats are being made with a thread spec that is "close" but not exactly right. If your tractor wont start, it might be time to replace the float valve seat. 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? You can also replace the bushings separately if the shaft is in poor condition. The shafts may have oval holes. WARNING Products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.For more information, visit www.P65Warnings.ca.gov. If not, make sure it isn't broken off and wadded up inside the carb. If you have a drill press, some have an accessory vise that can be used to clamp the carb body square to the bit. We apologize for the inconvenience, and we thank you for choosing Stevens Tractor. Pull the end and rod in opposite directions, the socket should then come right off the ball stud. Mission creep strikes again. This requires drilling the casting out to accept the new bushings. However, new shafts may be all you need. I've found this is usually nearly impossible to get wrong. There was once a gono-go float setting gauge, but I have not found one of those. Many of the replacement carbs may not have been made for a Ford tractor. C4The carb kits usually have a new float seat so remove that (Using special tool No.2). After draining the gas, disconnect the fuel line and light wire, remove the radiator cap, and unscrew the four bolts on the dash and doglegs. You should now have a saw horse ready to place on the hood. B2Check the idle speed screw. The choke shaft should be accessible once you remove the gas tank. Its easy to find a new air tube with the same inside diameter as the old one. If your tank is rusting then this will contaminate your fuel. Murphy can really test your patience sometimes. Most of the ones on ebay look like generic imports. A forum community dedicated to all tractor owners and enthusiasts. Catch it before it hits concrete. Once screws are out, remove the plates, and slide the shafts out. Remove the washer seal where the main mixture screw went into the carb. There are several components that make up a tractors carburetor, so choosing the best one is essential for the tractors engine. Snug the Main Nozzle down with the deep socket. Copyright 1995-2022 eBay Inc. All Rights Reserved. 8N-9510 TSX-241C = 8N tractors built late in 1952. Carburetors are limited to replacement only, no refunds or replacement will be given if rust, dirt, etc. Almost all M/S carbs can be rebuilt to match the TSX-241B. Similar to removing the Main Jet, you need to use the correct size screwdriver that will reach it. If so, it only takes a second to crimp the screws with a pair of pliers. Flip the throttle or choke plate open. These usually come out easy. A new neoprene shaft oil seal will improve performance, but it wont last long. Don't under-size the idle jet or fail to rod out and open the idle fuel passages. 2GrinderAny type that you can use to make special tools. A new seat will bind after a few turns, so take your time. If the screws are too short to crimp, I start rummaging in my spare parts for replacements that are longer. Sometimes the seals will be behind a metal retainer. To replace the shaft of the carburetor, you must first remove the idle screw and then insert the throttle plate. The main mixture screw is very long. The N is known to overheat and the problem is typically caused by an overfilled radiator. E4Install the Main Nozzle with a gasket that looks similar to the one that went under the float seat, but slightly smaller. Does anyone have a recommendation for a replacement carb for the original Marvel on a '47 8N? The next part is the hydraulic pump. The hydraulic pump was also changed to the new style, which was installed on the new Jubilee. We also offer a new fuel tank, 9N9002. The throttle shaft should have a neoprene seal. Then, you can install the idle adjusting needle. Another way to tell the age of your tractor is by looking at the hydraulic pump housing. 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). It may be easier to do this with a neighbor. I don't have drill bits in 64ths, but a 9/32" is right in the middle. 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. Now the screws cannot back out on their own. For example, if your serial number is G187, it means it was cast after July 18th, 1947. Some screwdriver shafts are 1/4" or you could use a 9/32" drill bit. Your email address will not be published. We also offer a new fuel tank,9N9002. 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. TIP:This is something that is more likely to be a problem with other vehicles, where the carb mounts on top of the engine. The chart below is provided in the event something did not come apart as it should. Holes that are not properly centered in the castings make the parts weak in critical areas. Try to replace the seat by hand, if youre unsure about its thickness. If you have a good eye, a piece of 1/4" dowel rod makes a great gauge to roll across and measure with. If its too short, it is time to replace it. If not, no problem, just run a #8-32 tap into the hole and make sure there are good clean threads for a new jet. Carefully remove two screws that hold each plate to the shaft. About quart size should do it. E7If you took the shafts out, reassemble shafts, plates, shaft seals, and finally install the mixture adjustment screws. Some people claim the Zenith is an upgrade. Clean the shaft and lower body with the carburetor solvent. To replace the oil seals, the first step is to remove the lubricant from the oil filter and clean it. Select or grind a screwdriver that fits snug in the slot and hold it in place firmly so you don't damage the screws. Welcome to Tractor Forum Bigfoot365! What kind of performance increase would there be? Speed and performance were not an issue!! If the neoprene shaft seal is in good condition and you only see faint scratches, go for the NAA piston. Required fields are marked *. E6Once you have that figured out place the top cover on and start a couple of screws. A bad water pump will squeak. Does anyone have any experience with the Zenith? We still need to stay completely square and perpendicular to the item being drilled. The carb I used to test this process was the really nasty one pictured above. Next, remove the upper body and the float from the carburetor. Monday-Friday 7:30 AM - 5:00 PM | Saturday 7:30 AM - 12:00 PM | Sunday CLOSED. None of these trademark holders are affiliated with this web site, nor is this site sponsored or endorsed by them in any way. The serial number of your 8N tractor can help you determine the date of manufacture. Ford tractors were first built in 1947 and were sold as 1948 models. The modern equivalent is a 1/8-27 NPS (national pipe straight). A5Remove two nuts at the manifold and the carb should drop right off in your hand. Each passage must be larger than the jet that goes in there, or the passage will restrict flow more than the jet. Among many places that I have seen that carry them, Wilson Tractor Parts has them on sale. Clean up sorting good parts from stuff that will be replaced. Something went wrong. 8N-9510 TSX-241B = 8N 313112 and up. You want the gasket to stay with the top of the carb if possible. Hold the screwdriver squarely in the slot. A tight-fitting open-end wrench may work ok, as long as the nut wasn't previously tightened by a gorilla. C5Removing the Main Nozzle is a bit obvious. The carb can be tuned to run ok with just about any size that isn't too small. The proper screwdriver will have a flat blade no wider than the shaft. I have used something as simple as a dime gripped in a pair of vice grips, but a properly-fitted special tool works much better. A2Remove the fuel line at the carb fitting. A3This is a good time to start snapping some photos. Many of these tractors have new aftermarket M/S type or replacement Zenith Carbs. I usually end up straightening any bending the previous rebuilder may have done. New shafts can usually be obtained in kit kits. If the old neoprene seal has deep scratches, it will eat into the new neoprene seal and leak more than ever. Using the proper size screwdriver, I did manage to coax all four body screws out, without damaging the heads. All N-Series TractorsFord-Ferguson 9N, 2N, and Ford 8N. There are always tractors being parted-out on ebay, so that is the best way to get decent original carbs. I did some checking and believe this is another of those issues caused by replacement parts from China that just don't fit. Once youve removed the float, remove the seat. Most 3/8" nut drivers will slip over the Nozzle, but may not provide enough leverage or control to remove the nozzle. Put the wrench inboard as close to the carb as you can get it. This will ensure that the engine runs properly and efficiently. Many carbs rebuilt by previous owners will not have been properly and completely cleaned. There is no way this one came off a "working tractor". Unfortunately, this carburetor willnotfit overhead valve engines or Ferguson tractors. Some replacement float valves are a little taller or shorter, so if everything else checks out ok, go ahead and bend the float to get the correct 9/32" height. The main mixture screw is frozen, and the carb body screws were rusted in place. The idea is to remove the jet without having to drill and tap the remains out after wringing the top off. I pulled the pieces out a couple of times, to brush away loose paint and dirt. Four corner screws secure the top. We are removing it now, so it won't get bent later. C3The remaining disassembly is necessary. Next, remove the lift arm bracket and inspect the cylinders cavity for damage. This may be due to not understanding how the idle mixture screw works on these carbs. All of the individual gaskets and parts are available for purchase separately. We sell fuel tank sealer, NR1251& NR1259. I ended up reworking the original carb and it worked fine. To do this, youll need a special tool to catch both slots of the float valve seat. The air filter is a very common problem in Ford tractors, but it is an easy fix. Might need them for the next carb. if this adjustment seems way off STOP, and make sure the seat for the float valve is screwed all the way in. If you don't have access to shop equipment like that, these carb parts can be carefully drilled-out by hand. Manual ones are cheaper, but they have more moving parts and require more maintenance than electric ones do. None of the jets would come out either. The serial number of the tractor you are working on should indicate the year it was built. With those installed, that leaves only the Power jet which goes in the lower half of the carb under the Main Nozzle. In most cases, even the basic kit will have more parts than needed. You may need a neighbors help to disconnect the fuel line and the light wire. B7Flip the top over and remove the float hinge pin, float, venturi, and peel the gasket off. Bushings are not provided in kits, but are available separately. After youve installed the top cover, install the shaft seals and plates. 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}}. I find it easiest to use a smooth dowel and estimate that last 1/32". for the 9N and the last TSC-241B spec. If your fuel is contaminated, you cannot fix the problem with a new carburetor. Watch for screw slots that have already been damaged by using the wrong size screwdriver. So if you raise the float (more clearance) this will actually be a lower float setting when you flip the top over and assemble the carb. The float assembly is mostly below the gasket, but it's hinged to the top, so there is less chance of bending something if it all comes out still attached to the carb top. However, if you are not comfortable with the idea of replacing a carburetor yourself, you can purchase an affordable and convenient rebuild kit. Changes made to the 241C that were intended to maximize efficiency caused too many problems. All of the passages need to be checked, cleaned and possibly drilled out to a size that is larger than the jet. Nearly all of the M/S type carbs can be rebuilt to the TSX-241B specifications. Most of the wear is often in the shaft, so new shafts and seals might be all you need. No need to be a gorilla and wring the threads out of something. Sizes Found = 0.026 0.027 0.029 0.037 (TSX-241B 0.038) 0.043 0.041 [0.046] 0.047 0.049, Power Jet = 9N 9533 M/S # 49-162 #8-32 Thread (large head) If you dont have a special tool, you can use an old flat file. Make sure you have seen the horses ready so you can put the hood on securely. I tried one of the generic imports on my Cub 154 Lo Boy years ago and was tremendously unimpressed with the quality and poor fit. E1Before we start putting things back together, these are soft brass parts going into a cast iron carb body. C6As mentioned, the Main Power Jet is under the Main Nozzle. Spray some carb cleaner in the carb halves and place them where they can soak a bit. Make sure to note your carburetors settings so you can make future adjustments if necessary. 9Air Compressor or perhaps canned compressed air to blow out and dry passages. These changes improved the tractors overall strength. Then, the idle screw must be backed off until the throttle plate is tight. It may be best to let the PB Blaster work overnight. This way, you can avoid having to spend money on buying a new one. Please use a flare nut type wrench, so you don't immediately round off the corners of the nut. The tapered part should be at the top when the carb is assembled. You should then disassemble the intake parts and clean them thoroughly. The mm size eqivalent is 0.5 to 1.5 in 1/10 mm increments. Any jet significantly larger than 0.050" is tossed in the trash. The entire top surface of the float should be parallel with and approximately 1/4" away from the gasket surface. The carburetor shaft may be loose and you may need to install new bushings. I usually run the correct size tap in each threaded hole as part of the cleaning process even when things come apart with no trouble. That is good, there are plenty of used carbs, and replacement parts available. The sizes listed in bold text above are the original TSX-33 spec. This is still good advice for any carb work. Marvel Schebler Style Carburetor for Ford Models 9N, 2N and 8N, Skip to the beginning of the images gallery. I consider the two bold values as minimum and maximum sizes for each jet. In this case, count turns OUT until the throttle plate is completely closed. The studs should stay in the carb. Some damaged parts can be salvaged. They were used on a wide variety of vehicles for many years. 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. You can purchase replacement bushings separately, but you may need to drill and install new ones, as well. B6Time to remove the carb top. There is a Basic Kit that should sell for around half what the complete kit costs. The actual fractional dimensions closest to the decimal tolerances are 17/64" and 19/64". If you have any questions, or problems with this site, please send me a message: When drilling out old jets or anything else in the carb, there is already a centering hole, so it is fairly easy to keep the drill centered. Current pump gas is only 10% ethanol, but it does make me lean towards the larger jet sizes. A4Next remove the linkage and air tube. Remove the carb drain bolt and let it drain into the can. The first thing you need to know when looking at replacement carburetors is that there are two kinds: electric and manual. Guitar string is my first choice. An old flat file or a very big screwdriver is a good start for this tool. Before you begin, make sure to drain the gas from the tank on your 8N tractor. Carburetors are limited to replacement only, no refunds or replacement will be given if rust, dirt, etc. They go in a few threads and then get difficult. JavaScript is disabled. A friend suggested soaking carbs in vinegar for a few days, then soaking in mineral spirits for a few days. Some skip it, but it's impossible to get all those little passages completely clean without removing the Main Nozzle and jets. It's also nice if it has a pin to keep it centered. The flutes mess me up. Electric ones are more expensive but easier to use and maintain. It helps that the material being removed is usually softer than the casting around it. If the shafts need to come out, snap photos to document how the plates, screws, and choke springs fit. Alternatively, you can purchase separate bushings. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Copyright 2017 - 2022 Justagric | Designed by Godwin Chibuike, Best Replacement Carburetor For 8n Ford Tractor. C8The Economizer Jet is located deep in a hole to one side of the Idle Jet. If the seat is tight, with the correct seal under it, the carb float should not require bending to get the correct height. Sizes Found = (TSX-241B 0.024) 0.025 0.027 0.028 [0.032] 0.033 0.035 0.046, Economizer Air Jet = 9N/9N 9914 M/S #49-161 #8-32 Thread (small head) Start with a small bit, and work up to the tap bit size indicated for that hole. Fits 2N, 8N, & 9N only. Absolutely no way do we want to give those screws any chance to rattle loose and get sucked into the engine! B5Carefully unscrew the fuel elbow fitting. This would suggest that our fuel jets need to be getting a little bigger as alcohol percentage increases. One bit of gum, varnish, or crud left in those passages WILL prevent the rebuilt carb from performing properly. This is where you will need Special Tool No.2 again. JavaScript seems to be disabled in your browser. B4Carefully pry the shaft seals out of the holes with a Pick Tool. Check for low coolant, loose fan belt, debris in the radiator fins, and a stuck thermostat. 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. Do rinse thoroughly, until all vinegar smell is completely gone, or the carb will immediately start rusting again. B1If you are certain the carb came off a working tractor, get a piece of paper and take some notes. Once you have the throttle plates centered and screws tight. 1Special ScrewdriversCollect 2 or 3 old useless straight blade screwdrivers and an old dull flat file about 1/2" wide. You may need to pry around the edge a bit to separate the bottom half of the carb from the gasket material. It will come out using the proper size screwdriver. This part is usually made from aluminum. Start with the top cover. The manual says the top of the float should be between 0.260" amd 0.297" from the gasket surface, using the standard thickness cork gasket. The pump base on the 8N was cast iron. So, without getting too excited about it, I always check jet hole sizes and try to make sure the Idle jet is at least 0.032", the Economizer Jet is at least 0.046", and the Power Jet is 0.050. What we want to do is thoroughly clean the carb, and fix anything that may have been wrong. It needs to be wide enough to catch both slots. Ford soon issued Service Bulletin 118 with instructions to re-install the econ jet and restore the "241C" carbs back to "241B" specifications. 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.