Show Quality Rebuilt Carter Carburetor
Fits 50-52 M38

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Show Quality Rebuilt Carter Carburetor
Fits 50-52 M38
Rebuilt Carter YS-637 Carburetor

Our rebuilt Carter carburetors are show quality and have a one-year factory warranty. They are color coded and calibrated and all linkage and hardware is replaced. You wont find a better rebuild anywhere. Guaranteed.

Carter YS-637 (side draft)

4-134 L engine

50-52 M38

Customer core must be sent in prior. Call for details.

Unsure of your Carter number? They are stamped directly into the metal bowl. Check on the middle body for a vertical tag next to the metal accelerator linkage.
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Questions: Hi, please send me the dimensions of the following carburettors as per your part numbers #923804-A; #647744, A17854 and #923806. I have built a 1953 CJ3B motor in a 1949 CJ3A chassis and body (Tub, fenders and grill)
Question By: Gerhard Genis on Aug 28 2022 4:31 PM
The F head engine will not allow you to close your hood. The carburetors will be too tall. Email to try to help.
Answer By: Willys Jeep Parts Tech on Aug 29 2022 5:36 AM
Questions: I just went through a YS and have a question about the port on the right side of the venturi with the float bowl facing away from you, not the one with the check ball and weight but across from it, there is a divit that looks like a question mark and a port, air does not blow thru it and I haven't seen where it comes into play downstream in the venturi,what am I missing. Thank you Aaron
Question By: Aaron on Oct 1 2021 4:47 PM
Email us a photo of yours and we can help out answer question.
Answer By: Willys Jeep Parts Tech on Oct 4 2021 5:29 AM
Questions: Hi Mike !!! I have a YS carb I purchased from K&W --- I can't get it to idol without the choke engaged and throttle out --- fuel pressure is good. Your thoughts ??? Regards Jerry
Question By: Gerald Jacyno on Jul 21 2021 12:33 PM
Your engine is probably generating poor vacuum. You should be 20 pounds of draw at idle once fully warm and no longer choked. RPM around 475. If you dont have this the carburetor can leak or die because fuel cannot discharge out of the carb properly. I would check your cold valve clearances and use a pressure gauge to check it too.
Answer By: Willys Jeep Parts Tech on Jul 21 2021 6:42 AM
Questions: First -- This is a GREAT service you provide ; so much easier to get answers about specific items -- thanks !!! Looking for a YS-637 w/o a core -- are they available ??
Question By: Gerald Jacyno on Oct 1 2020 4:17 PM
We probably can source you a core. Please email Thanks!
Answer By: Willys Jeep Parts Tech on Oct 1 2020 9:39 AM
Questions: hi i need a bench set carb to replace the one on my m38 1952 , its a carter YS similar to this but the number on it is 0- 548 will this one fit?
Question By: paul richards on Nov 12 2019 11:28 AM
If you have an M38 with a side draft then yours should be stamped 637 on it or have a tag that has those numbers. Please email to help. Thanks!
Answer By: Willys Jeep Parts Tech on Nov 12 2019 5:31 AM
Questions: Hi I live in Sweden and I have a nice M38 (flat fenders) with a Carter YS 637 carburetor.. The carburetor flood the manifold and I have tried everything. Can I send my carburetor by mail and have it rebild with "function guaranteed". I have had the M38 for 10 years. Last summer this problems started. The engine now starts fine run smooth for 30 seconds then start coffing and stops.. When I remove carb there is liquid petrol(gas) in bottom of manifold. Best regards Thomas Bjorkman Falun Sweden .
Question By: Thomas Bjorkman on Oct 8 2019 8:54 PM
Yes, send it into us and we can rebuild it for you. Make sure you contact information is in the box. You most likely have a vacuum leak.
Answer By: Willys Jeep Parts Tech on Oct 9 2019 6:12 AM
Questions: I have a 52 willys m38 jeep at idle it floods I took the carb off and ther was gas in the intake manifold do I need a new carb I was thinking of getting a solex carb would that work on my m38 thanks
Question By: Chet Mattox on Oct 3 2018 2:51 PM
I would check your timing and fuel pressure. The needle may be stuck open. Call us toll free. We can help you. Ask for Mike M.
Answer By: Willys Jeep Parts Tech on Oct 3 2018 10:54 AM
Questions: Hi, I have a CJ3A with maybe Solex type 32PICB, this carb will be fit on my jeep?
Question By: Josue Conti on Dec 15 2017 1:53 PM
923806 would be a good option for you. OR we can rebuild your Carter if you like. Call us toll free and we can go over options.
Answer By: Willys Jeep Parts Tech on Dec 15 2017 11:11 AM
Questions: I have a Carter WO core. Can I send in that for the YS carb?
Question By: Barry on Mar 17 2017 6:54 PM
Please call and ask for Mike M. We can see what we can do for you. Thanks!
Answer By: Willys Jeep Parts Tech on Mar 20 2017 5:53 AM