+ applicable tax
Your Ford tractor won't start, idles rough, surges under load, or dumps fuel out of the throat. The original carburetor on your 172 cubic inch gas engine is worn out — the throttle shaft is sloppy, the float needle is leaking, and the accelerator pump diaphragm has cracked. You can spend $150+ on a rebuild kit and hope the casting isn't warped, or you can bolt on a brand new carburetor and be back in the field in 30 minutes.
The dealers and big-box retailers want $380 to $600+ for this carburetor. We sell the same direct replacement for $349 — saving you over $200. This is a complete, brand new carburetor that bolts directly onto the intake manifold of your Ford 172ci gas engine. Replaces Ford part numbers C0NN9510C and C0NN9510G.
This is the #1 mistake people make when ordering a Ford tractor carburetor. There are TWO different carburetors for Ford N-Series and Hundred-Series tractors, and they are NOT interchangeable:
How to check: Measure the distance between the center of the two mounting bolt holes on your intake manifold. If the distance is 2-11/16" (approximately 2.69 inches), this is the correct carburetor. If the distance is 2-3/8" (approximately 2.375 inches), you need the smaller Ford 600/700 carburetor — contact us.
Ford 172ci gas engines use a downdraft carburetor that was state-of-the-art in the 1950s and 1960s. These carburetors have been in service for 60–70+ years on tractors that are still working every day on farms, ranches, and small properties across America. Time takes its toll:
A rebuild kit can help if the casting is in good shape, but if the throttle shaft bores are egg-shaped or the casting is warped, no rebuild kit will fix it. A complete new carburetor is faster, more reliable, and often cheaper than a professional rebuild.
This is a complete, brand new replacement carburetor built to the same specifications as the original Ford C0NN9510C / C0NN9510G. Same 2-11/16" mounting bolt spacing, same 7/16" fuel inlet thread, same 1-5/16" throat diameter. It bolts directly onto the intake manifold of your Ford 172ci gas engine with no modifications, no adapters, and no machining. Remove the old carburetor, transfer the fuel line and throttle linkage, bolt on the new one, and you're running.
The C0NN9510C carburetor fits the following Ford tractor models equipped with the 172 cubic inch gas engine:
⚠️ The Ford 4000 was produced in different generations with different engines. Pre-1965 models used the 172ci gas engine. Later 4000 Series models used a 3-cylinder diesel or a different gas engine. Verify your engine displacement before ordering. If you see "172 CID" or "Red Tiger" on your engine data plate, this is the correct carburetor.
How do I know if I need the 2-11/16" or 2-3/8" carburetor?
Measure the distance between the center of the two mounting bolt holes on your intake manifold. The 172ci engine (Ford 800/900/4000) uses the 2-11/16" spacing. The 134ci engine (Ford 600/700/2000) uses the 2-3/8" spacing. You can also check the fuel inlet fitting — the 172ci carburetor uses a larger 7/16" thread, while the 134ci uses 3/8". If you're still unsure, contact us with your tractor model and engine serial number.
What is the difference between C0NN9510C and C0NN9510G?
These are the same carburetor. Ford revised the part number over the years, but the physical carburetor is identical. C0NN9510G supersedes C0NN9510C. This carburetor replaces both part numbers.
Does this carburetor need any adjustment out of the box?
Set the idle mixture screw to approximately 1-1/2 turns out from fully seated as a starting point. Start the engine, let it reach operating temperature, then fine-tune the idle mixture for smoothest idle. Adjust the idle speed screw for the correct idle RPM per your operator's manual. The float level is pre-set at the factory.
Will this work on a Ford 600 or 700?
No. The Ford 600 and 700 Series use the smaller 134ci gas engine with a carburetor that has 2-3/8" mounting bolt spacing and a 3/8" fuel inlet. This carburetor has 2-11/16" spacing and a 7/16" inlet — it will not bolt onto the 134ci intake manifold. Contact us for the correct 600/700 carburetor.
My tractor has been sitting for years and the carburetor is full of varnish. Should I rebuild or replace?
If the tractor has been sitting for many years, a complete replacement is almost always the better choice. Old fuel turns to varnish that clogs internal passages, the throttle shaft bushings wear egg-shaped (causing air leaks), and the aluminum casting can corrode. A rebuild kit cannot fix a worn casting. A new carburetor gives you a fresh start with correct tolerances and new internal components. It's also faster — 30 minutes to swap vs several hours to rebuild.
Direct replacement carburetor for Ford 800, 900, and 4000 Series tractors with the 172 cubic inch gas engine (Red Tiger). Critical 2-11/16" mounting bolt spacing and 7/16" fuel inlet — NOT the same as the smaller Ford 600 carburetor. Replaces Ford C0NN9510C and C0NN9510G. Save over $200 vs big-box retailers.
