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Master Carburetor Repair Kit
Fits 41-53 Jeep & Willys with Carter WO carburetor

Part # 647745-MK

Master Carter Carburetor Repair Kit for Carter WO

Complete with gaskets, small parts, linkage, metering rods and jets to rebuild your original Carter carburetor. Includes base gasket.

4-134 L engine

Helpful Guides and Illustrations:
Fuel Servicing and Adjustment
Fuel System Illustrations

41-45 MB
41-45 GPW
46-49 CJ-2A
49-53 CJ-3A
46-49 Truck
46-49 Station Wagon

Station WagonNote:
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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I have an F engine in my 1949 3A Willys 4J491801 (3B Engine) with a WO Carter carburettor for the hood to close. The vehicle idles incorrectly and dies when revolutions are below 100 RPM. Local guys told me I have the incorrect Jets. How will I know the correct jets, or do I need to buy the entire kit to be sure? Gerhard Genis

Willys Jeep Parts Tech:
Probably not a jet issue. Email to help. Its most likely a vacuum issue.

You said that the master kit has exterior linkage. What does this include? (Throttle, Choke, Idle screw, etc.)

Willys Jeep Parts Tech:
It comes with everything that is shown in the photo.

I have the L-134 with the WO carter carburater. Can I purchase the fast idle lever?

Willys Jeep Parts Tech:
Sorry, i dont have that available just by itself.

Does this include shaft bushings?

Willys Jeep Parts Tech:
That you would have to send your carburetor into us to be re-bushed.

I have an L-134 engine with a WO Carter Carburator, do your rebuilding kits address newer gas mixtures that contain 10% ethanol? Also, are the kits made in the USA and direct from Carter?

Willys Jeep Parts Tech:
Yes, you can run modern fuel - but regardless you never want to use ethanol fuel. Only run Non-ethanol.

We are working on a 1946 Willys. We have a Carter carburetor on it. We purchased the Master Carburetor rebuild kit and have completed the rebuild. It is still running too lean, and when we hit gas the vehicle just goes blllaaah and wants to die. Is there something you do when you rebuild with the jetting or the accelerator pump as it is slow to respond. We originally were just going to send it off to you for rebuild, but my client cannot wait the time we were told it would take to turn it around. Myself and my shop foreman have 50+ years between us and are confident the rebuild has been done correctly, just looking for some tips on tweaking it. Thanks in advance for any help you can provide. Regards, Dave Norgord

Willys Jeep Parts Tech:
I would check your vacuum draw at idle once fully warm and no longer choked. Idle set to 475 rpm. You should have 20 inches of vacuum draw. I would also check your timing.

I’m new to this whole restoration thing. I have a 47 willys and need to replace some parts does this come with the float?

Willys Jeep Parts Tech:
668855 is the part number for the float.

I have rebuilt my CJ2A carburator with your master kit. Now the motor, at idle, only runs with the choke, even hot. Do you have any ideas what I did wrong? Thanks.

Willys Jeep Parts Tech:
I would check your vacuum. You should have 20 inches of draw at idle (approx 450 rpm).

hi,could you tell me if a carter wo rebuild kit will fit a zenith wo carb.,which you probably know is a identical copy many thanks bill rice

Willys Jeep Parts Tech:
No, the components are different.

Does this include the external springs?

Willys Jeep Parts Tech:
If your referring to the linkage retracting spring that is part number: 644067

Can not find any numbers how many variations does this kit cover?

Willys Jeep Parts Tech:
Just the Carter WO - it will say WO right ontop your bowl.

Will this work on a carter yf

Willys Jeep Parts Tech:
923800 is the part number for the repair kit for the YF.

I understand that the master kit for the Carter WO contains some additional linkage components. I don't know which components are involved. I can't see any difference in the pictures. Maybe it's my old eyes.

Willys Jeep Parts Tech:
I'll have to check the image. It has additional linkage for the outside.

What is the difference between the Carter rebuild kit and the Carter Master rebuild kit? Thanks.

Willys Jeep Parts Tech:
The master kit has some additional linkage for the outside of the carb.

Does it come with a metering rod adjustment tool? Please let me know. Thanks!

Willys Tech:
10926 is the part number for that item.

The carb on my truck is a Bendix Zenith 11275 D. Will this carburetor kit work on this carburetor?

Willys Tech:
No, you have an unoriginal Zenith carb on your vehicle. This is for Carter WO's only.

What are the carb setting for the carter wo

Willys Tech:
Not sure exactly which specs your looking for. Please call us toll free. Im sure we can help.

I have a 636 carburetor. Will this kit work?

Willys Tech:
Yes that is a WO. It should say it right on top of your bowl.

Do you deliver parts to Europe?

Willys Tech:
Sure. We ship daily UPS and USPS international.

Ordering #647745 Carb Kit. Will this kit tolorate 10% ethanol content blended into gasoline?

Willys Tech:
Yes it is make for modern day pump fuel.

The standard main jet metering rod (75-547)looks like it comes with the master kit. I live in the mountains of northern New Mexico, about 8000', is the 1 size leaner (75-548) needle available on special order? Thanks, Jim.

Willys Tech:
At high elevation you may have to have this made.

For the master carburator kit #647745 its hard to see the float pin assembly, I assume the pin and spring comes with the kit.

Willys Tech:
Yes that is correct.

What instructions if any are supplied with your 'Carter WO Master Carb Repair Kit,647745-MK'.

Willys Tech:
I believe it does come with instructions yes.

How do i know wich modle carb i have on my 51 cj-3a

Willys Tech:
You should have a WO. This will be proper. It will stamped WO on your bowl.

Does this kit come with all the parts of Item # 647745 plus the parts pictured above?

Willys Tech:
Yes that is correct.
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