C1At this point there is still some disassembly to do, but my workbench is covered in dirt, grime, and bits of old paint. Clean the shaft and lower body with the carburetor solvent. I pulled the pieces out a couple of times, to brush away loose paint and dirt. Any jet significantly larger than 0.050" is tossed in the trash.

E4Install the Main Nozzle with a gasket that looks similar to the one that went under the float seat, but slightly smaller.

A new seat will bind after a few turns, so take your time.

Most things like jets only need to be snugged down.

The original carbs seem to be much better in quality and it may be worth the cost to save it if possible.

The carburetor shaft often requires the most maintenance.

Most of the original or new aftermarket carbs sold for these engines can perform equally well, as long as they are properly checked-out, cleaned, and tuned. Sometimes the seals will be behind a metal retainer.

There are always tractors being parted-out on ebay, so that is the best way to get decent original carbs. Use solvents, scrapers, elbow grease, and compressed air in whatever quantity seems appropriate. Fits 2N, 8N, & 9N only.

Use your third hand to do that.

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E3Install the new float seat with the correct gasket (usually red color).

A4Next remove the linkage and air tube. Hold the screwdriver squarely in the slot. Check the venturi again making sure the tapered part is still on top. After recording the settings to the nearest 1/4 turn, remove the adjusting screws and springs completely.

Here, we will look at the choke shaft, the neoprene shaft seals, and the float valve seat, among other things. These seals are responsible for preventing leaks around the crankshaft. All rights reserved. Copyright 1995-2022 eBay Inc. All Rights Reserved.

You can easily remove the air filter housing from your tractor by unbolting two bolts and loosening the clamps on the air pipe. If its too short, it is time to replace it. If not, make sure it isn't broken off and wadded up inside the carb. One bit of gum, varnish, or crud left in those passages WILL prevent the rebuilt carb from performing properly. The fan belt should have at least a half-inch of flex at its mid-point.

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9Air Compressor or perhaps canned compressed air to blow out and dry passages.

Using the proper size screwdriver, I did manage to coax all four body screws out, without damaging the heads. In most cases, even the basic kit will have more parts than needed. is found in the carburetor or if it has been taken apart.

Pay close attention to how the venturi (round thing in the middle) is installed in the carb top through the gasket. Hey guys we'er talking the 1940's here!!

The choke shaft seal is a felt washer. Each passage must be larger than the jet that goes in there, or the passage will restrict flow more than the jet.

I don't have drill bits in 64ths, but a 9/32" is right in the middle.

That may be true for an original carb that was built to specifications, but completely false for many replacements.

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If its D252, then it was made after April 25th, 1952. E2Install the correct jet into each hole.

Might need them for the next carb. The air filter is a very common problem in Ford tractors, but it is an easy fix. The first thing you need to know when looking at replacement carburetors is that there are two kinds: electric and manual. This may be due to not understanding how the idle mixture screw works on these carbs.

The 241B spec for idle jet is definitely a minimum size to make sure the engine can pull sufficient fuel thru the idle passages.

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If you have a good eye, a piece of 1/4" dowel rod makes a great gauge to roll across and measure with. Please be patient during this time. Pick a new, sharp or specially ground screwdriver that fits tightly in the screw slot.

The rear lift arms were also beefed up.

Soaking in solvent will loosen some deposits then a combination of rodding-out and air pressure should thoroughly clean the passages. The idea is to remove the jet without having to drill and tap the remains out after wringing the top off.

Make sure to note your carburetors settings so you can make future adjustments if necessary. The inside does not look any better.

Some damaged parts can be salvaged. 4Pin ViseA very small drill bit holder. This fitting is soft and easily bent.

You can also clean the air tube with sandpaper.

All Tradenames and Trademarks referred to on these web pages are the property of their respective trademark holders. if this adjustment seems way off STOP, and make sure the seat for the float valve is screwed all the way in.

Does anyone have any experience with the Zenith? I've found this is usually nearly impossible to get wrong.

A2Remove the fuel line at the carb fitting.

I consider the two bold values as minimum and maximum sizes for each jet. 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.

Remove the carb drain bolt and let it drain into the can.

A new neoprene shaft oil seal will improve performance, but it wont last long. I keep all of the old parts until I'm done and don't throw away any parts that appear usable, even if I'm sure they will be replaced. Catch it before it hits concrete.

Anything will seem like an upgrade when it replaced any dirty, worn-out carb with a clean one. If these components are damaged, you can replace them with the appropriate parts.

Look down in there first to see if your carb even has this jet. The inside diameter should be 1.5 inches.

KEEP THE OLD JETS!

A friend suggested soaking carbs in vinegar for a few days, then soaking in mineral spirits for a few days.

With those installed, that leaves only the Power jet which goes in the lower half of the carb under the Main Nozzle. They go in a few threads and then get difficult. Early models had a prone-to-break linkage, and early 8Ns still had holes for the Ferguson System badges on the grille. A set of flare-nut wrenches may save you from rounding off those soft fuel line fittings.

The castings and finishing are often mis-aligned.

Please use a flare nut type wrench, so you don't immediately round off the corners of the nut. If you cant find the carburetor solvent, you can use compressed air to clean the castings. 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.

Put the wrench inboard as close to the carb as you can get it. We will continue to ship your packages, but due to the recent COVID-19 pandemic, your packages may not arrive as scheduled. What kind of performance increase would there be? 8N-9510 TSX-241A = 8N 276116 - 313111 If that isn't an option, Loctite, or even a dab of epoxy, might be used for insurance. Make sure you have seen the horses ready so you can put the hood on securely. The serial number of the tractor you are working on should indicate the year it was built.

In this case, count turns OUT until the throttle plate is completely closed.

Clean up sorting good parts from stuff that will be replaced. Notify me of follow-up comments by email. Come join the discussion about farming, lawn maintenance, restoration, modifications, classifieds, troubleshooting, maintenance, and more!

The carburetor shaft may be loose and you may need to install new bushings.

There are several components that make up a tractors carburetor, so choosing the best one is essential for the tractors engine.

Please make sure you have clean fuel. This special tool needs to be wide enough to catch both slots in the Float Valve Seat.

I usually end up straightening any bending the previous rebuilder may have done.

All N-Series TractorsFord-Ferguson 9N, 2N, and Ford 8N.

Your email address will not be published. You may need to tap the hole in the top plate to accept the econ jet. If its not overheating, you have another issue.

3Pick ToolsPointy Steel Picks with various bends at the end. Carburetors are limited to replacement only, no refunds or replacement will be given if rust, dirt, etc. 8N-9510 TSX-241B = 8N 313112 and up. You should not be making new threads, just cleaning out threads that are already there.

What we want to do is thoroughly clean the carb, and fix anything that may have been wrong. When the fuel stops, this should confirm that your fuel valve at the tank actually closes off the fuel completely.

recommended by Ford. Electric ones are more expensive but easier to use and maintain. C5Removing the Main Nozzle is a bit obvious. D5Jet Info - Some rebuilders are convinced that specific sizes for jets work better, but the simple fact is that these carbs had a wide variety of "standard" jet sizes over the many years these tractors were built, and all carbs are basically interchangeable for all 9N, 2N, and 8N tractors. It's also nice if it has a pin to keep it centered.

Sort of like setting a rivet, Pinch the screw so that last thread is slightly deformed.

Finally, install the shaft adjustment screws.

The shop manual says not to use anything harder than copper wire to clean passages. You should also check the fuel filter to ensure that it is clean. This is an idle "air" adjustment, so it works backwards from practically any other carb on the planet. Select or grind a screwdriver that fits snug in the slot and hold it in place firmly so you don't damage the screws. The new design had enlarged pistons and reverse idler gears.

This is still good advice for any carb work.

If the screws are too short to crimp, I start rummaging in my spare parts for replacements that are longer. Alternatively, you can purchase separate bushings.

You may need a neighbors help to disconnect the fuel line and the light wire. Maybe not so good when many rebuild kits are now "universal" and may not have the proper size jets. 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.

Some screwdriver shafts are 1/4" or you could use a 9/32" drill bit.

8Precision measuring tool to measure bit and wire sizes.

C2Before taking them back to the workbench, get the carb halves and other parts as clean as you can inside and out. None of the jets would come out either.

9N-9510 TSX-33 = 9N carb used on all 9N,2N,8N tractors prior to serial number 8N 260596.

These changes improved the tractors overall strength. A5Remove two nuts at the manifold and the carb should drop right off in your hand. Start with a small bit, and work up to the tap bit size indicated for that hole. If your tractor wont start, it might be time to replace the float valve seat. Guitar string is my first choice.

All of the individual gaskets and parts are available for purchase separately. Then, you can install the idle adjusting needle.

Manual ones are cheaper, but they have more moving parts and require more maintenance than electric ones do.

Flip the throttle or choke plate open.

Fits 2N, 8N, & 9N only.

The Marvel/Schebler carbs were VERY successful. Sounds like your carb. Replace the filter in the same manner.

Make sure the seat is all the way in and tight on it's gasket.

This requires drilling the casting out to accept the new bushings. C7The other two jets are in the carb top.

Among many places that I have seen that carry them, Wilson Tractor Parts has them on sale. If your fuel is contaminated, you cannot fix the problem with a new carburetor. Next, remove the upper body and the float from the carburetor.

I did some checking and believe this is another of those issues caused by replacement parts from China that just don't fit. This is usually caused by a worn shaft.

The photos can save a lot of head-scratching later. Don't under-size the idle jet or fail to rod out and open the idle fuel passages.

Alternatively, you can replace the seals with genuine Ford tractor oil and grease.

Fasteners such as carb body screws may have been stripped and drilled out for oversize hardware.

Required fields are marked *. Too big is much better than too small.

B7Flip the top over and remove the float hinge pin, float, venturi, and peel the gasket off.

B4Carefully pry the shaft seals out of the holes with a Pick Tool.

A 3/8" 6-point 1/4" drive, deep well socket should be long enough, and thin enough to get on the 3/8" hex.

We sell fuel tank sealer,NR1251&NR1259.

Ford soon issued Service Bulletin 118 with instructions to re-install the econ jet and restore the "241C" carbs back to "241B" specifications.

An old flat file or a very big screwdriver is a good start for this tool.

Soak the area in PB Blaster first.

I ended up reworking the original carb and it worked fine. E6Once you have that figured out place the top cover on and start a couple of screws. This will ensure that the engine runs properly and efficiently.

Now the screws cannot back out on their own.

For the most effective results, replace the neoprene shaft oil seals before tackling the other components of the seals. The new aftermarket M/S types that I have seen are poor quality.

After that, youre ready to use your tractor. for the 9N and the last TSC-241B spec.

Don't worry about it too much. Once you have the throttle plates centered and screws tight. B6Time to remove the carb top.

The mm size eqivalent is 0.5 to 1.5 in 1/10 mm increments.

Then drop the float needle into the seat, set the top gasket on, and hang the float in place with the pivot pin. The main complaint with these carbs seems to be an idle adjuster that has no effect on the engine, even with the idle screw completely out! We sell fuel tank sealer, NR1251& NR1259.

If you don't have access to shop equipment like that, these carb parts can be carefully drilled-out by hand. Your email address will not be published.

The entire top surface of the float should be parallel with and approximately 1/4" away from the gasket surface. Carburetors are limited to replacement only, no refunds or replacement will be given if rust, dirt, etc.

If you want to know how to replace the choke shaft on an 8n Ford tractor, you have come to the right place.

Many of the replacement carbs may not have been made for a Ford tractor.

Is there a performance difference among the replacement carbs? Changes made to the 241C that were intended to maximize efficiency caused too many problems. Put the economizer jet in and snug it in place.

New shafts can usually be obtained in kit kits.

You can also replace the bushings separately if the shaft is in poor condition. You can purchase replacement bushings separately, but you may need to drill and install new ones, as well. Try to replace the seat by hand, if youre unsure about its thickness.

The actual fractional dimensions closest to the decimal tolerances are 17/64" and 19/64". The shaft and blade should fit snugly in the hole and in the jet slots. The 8N Ford tractor is a classic, and its a great choice for someone who wants to get into farming. Toss them in the jar of small parts and give it another swirl.

These tractors are identifiable by their flathead engine wihich has the carburetor mounted on right hand side of engine. If a kit has new jets, verify that the new jets have the correct size hole before discarding any old jets. The chart below is provided in the event something did not come apart as it should.

This would suggest that our fuel jets need to be getting a little bigger as alcohol percentage increases. If the seat is tight, with the correct seal under it, the carb float should not require bending to get the correct height. If the hole is noticably oval, new bushings are required.

Occasionally, things will be so corroded the only option is to drill out the old material, and pick threads clear.

Start with the top cover.

Loosen the air tube hose clamp at the carb and pull the air tube off.

The rebuild kits have introduced even more variations. Murphy can really test your patience sometimes. That is not a fair test, but I was still pleased with the result.

If your fuel is contaminated, you cannot fix the problem with a new carburetor. This way, you can avoid having to spend money on buying a new one.

7A selection of wire strands in various sizes that can be threaded through passages to clean them out. Hold the screwdriver firmly and squarely in the slot and apply just enough force to break the screws loose.

Some floats and valves will use a small clip to help the float pull the valve out of the seat. A special tool, such as a flat file, can be used. The tapered part should be at the top when the carb is assembled. We also offer a new fuel tank,9N9002.

The flutes mess me up. If you are looking for a new or replacement carb for any of the Ford N-Series Tractors, the Marvel/Schebler TSX-241B was the best that Ford engineers came up with for these tractors. To replace the oil seals, the first step is to remove the lubricant from the oil filter and clean it. It needs to be wide enough to catch both slots.

All of the new float seats I've installed seemed very hard to get all the way down. About quart size should do it.

The proper screwdriver will have a flat blade no wider than the shaft.

Make sure the new seat is firmly seated in the gasket and that the pin is securely hung on the float with a pivot pin. This one is missing the choke shaft, and judging by the hole where the shaft should be, it will need new shaft bushings. Almost all M/S carbs can be rebuilt to match the TSX-241B. There is a Basic Kit that should sell for around half what the complete kit costs.

Make sure the float pivot pin hasn't slid off one side. The pump base on the 8N was cast iron.

It may be best to assume the carb you are working on has already been rebuilt several times with a wide variety of skill or care.

You may need to loosen more of the clamps or even cut the hoses if they are really old.

You should then disassemble the intake parts and clean them thoroughly. If the old neoprene seal has deep scratches, it will eat into the new neoprene seal and leak more than ever. TIP:This is something that is more likely to be a problem with other vehicles, where the carb mounts on top of the engine.

Four corner screws secure the top. Nearly all of the M/S type carbs can be rebuilt to the TSX-241B specifications. C9If the shafts were very loose you may need to drill and install new bushings.

The hydraulic pump was also changed to the new style, which was installed on the new Jubilee. Drop all the small parts into a glass jar, add some carb cleaner and cap it. E3Check the float adjustment while holding the top of carb upside 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}}. After youve installed the top cover, install the shaft seals and plates.

It helps that the material being removed is usually softer than the casting around it. No need to remove them unless they are damaged and need to be replaced. The shafts may have oval holes. Pull the end and rod in opposite directions, the socket should then come right off the ball stud.

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Ford tractors were first built in 1947 and were sold as 1948 models. Next, remove the lift arm bracket and inspect the cylinders cavity for damage. E5Place the venturi into the top cover gasket.

If you cut your own gaskets, make sure you take any change of gasket thickness into account. Spray some carb cleaner in the carb halves and place them where they can soak a bit. There is no substitute for a screwdriver specially-ground to fit.

Our new carburetor includes the mounting gasket. Some skip it, but it's impossible to get all those little passages completely clean without removing the Main Nozzle and jets. Check for low coolant, loose fan belt, debris in the radiator fins, and a stuck thermostat.

What's left of the choke plate assembly was rattling around inside the carb.

If so, it only takes a second to crimp the screws with a pair of pliers.

Then you can unscrew the shaft and plate, and remove the shaft.

That is good, there are plenty of used carbs, and replacement parts available. You may need to pry around the edge a bit to separate the bottom half of the carb from the gasket material. Before you begin, make sure to drain the gas from the tank on your 8N tractor. 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.

To replace the shaft of the carburetor, you must first remove the idle screw and then insert the throttle plate. 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.

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