Carburetors - Carter W0 |
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sean
Moderator Group Sponsor Member Joined: 20 July 2005 Location: North Idaho Status: Offline Points: 7388 |
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Posted: 02 Nov. 2007 at 2:07am |
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4 carburetors were used on CJ2A over the years:
Group 12-04 -- Carburetor p/n 640304: Carter WO, type 596s - up to s/n 69589The 596S would accommodate only King-Seeley and Monarch governors. The 636S/SA worked with the Novi as well. The 636S and 636SA are physically identical. The only difference of note is the nozzle and retainer plug inside. This is a 636. S or SA unknown at this time (click for enlarged versions): The throttle body casting number is "I-458". This is the same on all 3 CJ carbs. The base flange stamped number is "505" on a 636S/SA, and "458" on a 596S. This is only visible with the carb removed from intake manifold. The butterfly shaft link has 3 screw holes:
The Model 596S is virtually identical to the 636. The only functional difference is in the throttle linkages (thanks Mike G!): The arrows point out the 2 different links, and the governor screw hole: remove screw for use w/King-Seeley or Monarch governor. An MB carb has a distinctly different throttle linkage: Some documentation, all PDFs: Carter Factory Datasheet: CJ-2A W0 models 596/636 Sean
Edited by sean - 02 Feb. 2010 at 12:40am |
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Josh Roberson
Member Joined: 08 Dec. 2008 Status: Offline Points: 3 |
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I have a stamped 636s carb with a throttle body casting similiar to what is shown. The difference being that mine is stamped 13 versus the 16 that is shown above. Do you know what this # represents? It is shown in picture #5 above and to the right of I-458.
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dennisanvil
Member Joined: 07 June 2008 Location: ia Status: Offline Points: 1645 |
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somebody correct here was the w/o carter carb the only carb. use on the cj2a willys ? the solex carb has been talk about but i was wonder about the carter . thanks
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dennisanvil 1948 cj2a, maker of tailgate hooks & hand forge iron ware
there not any knowen cure for jeep fever. serial # 164136< |
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Josh Roberson
Member Joined: 08 Dec. 2008 Status: Offline Points: 3 |
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According to the mechanics manual published by Willys-Overland Motors, Copyright 1948, Carter Type 596S and Carter Type 636S is the carburetor for the CJ2A. Keeping in mind this was copyrighted in '48 it makes sense that the 636SA was introduced after the printing of this manual.
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Jus*Jack
Member Joined: 15 Mar. 2007 Location: so. Georgia Status: Offline Points: 1841 |
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Dennis: The Solex is an after-market change made by various Jeep owners for many reasons. I've got one on one of my Jeeps, and it runs great, but there are often problems with fuel pressure if the switch is made. A Solex requires a lower pressure, from what I understand, and some folks have had to install a pressure regulator to solve the problem. I don't have that on mine, but my fuel pump may well have a lower output pressure to begin with, since it's probably been changed out prior to my owning the Jeep.
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Seeya!
<Jack> '48 CJ2A 197207 "Junebug" '48 CJ2A 191237 "Turquoise" |
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dennisanvil
Member Joined: 07 June 2008 Location: ia Status: Offline Points: 1645 |
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thanks for all the help. when i rebuilt my w/o carter i brought a kit from napa.they was surpize to find one in stock and on the shelf . they tought that they was aother use for that kit so the was trying to cross check it but couldn`t. i was wonder if there was another carb. from a differant car that could be use on a l-134 engine.
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dennisanvil 1948 cj2a, maker of tailgate hooks & hand forge iron ware
there not any knowen cure for jeep fever. serial # 164136< |
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sean
Moderator Group Sponsor Member Joined: 20 July 2005 Location: North Idaho Status: Offline Points: 7388 |
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Josh:
Dennis: there are lots of discussions about "other" carbs that can be used on CJ-2A. Try a search, and/or post your questions over in the "Tech Q&A" section. Sean |
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dennisanvil
Member Joined: 07 June 2008 Location: ia Status: Offline Points: 1645 |
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thank for the head up
dennis
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dennisanvil 1948 cj2a, maker of tailgate hooks & hand forge iron ware
there not any knowen cure for jeep fever. serial # 164136< |
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Howard
Member Sponsor Member Joined: 17 Feb. 2006 Location: New Mexico Status: Offline Points: 976 |
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This is a 636sa that was in a box as a new one. I think it is more likely a rebuilt new one...Sean, for spotters guide purposes, What exactly is the difference in the 636s and sa models? Can we see it?measure it?
Edited by Howard - 31 Jan. 2010 at 4:29pm |
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Howard F Jewett
1946 CJ2A #23353 43 GPW 106505 USA #20366014 43 Bantam Trailer T3 #14844 52 M100 K1119 |
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sean
Moderator Group Sponsor Member Joined: 20 July 2005 Location: North Idaho Status: Offline Points: 7388 |
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Nice Howard! I'd have to say that's either an exceptionally well preserved NOS carb, or superbly restored.
Leaning more towards NOS - still has the ID tag which typically isn't reused on a rebuild, and throttle body not re-painted, still original black oxide, but degraded. 636S & 636SA changes are internal, so they can't be physically distinguished by external clues. The only different parts are the nozzle, retainer plug & gasket. Sean
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Howard
Member Sponsor Member Joined: 17 Feb. 2006 Location: New Mexico Status: Offline Points: 976 |
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Do you have the Carter Lists that distinguish these differences?
Or are you referring to the Willys Parts list by part number? It gets a little tedious to follow the CJ parts list for these carbs...
It would be cool to have the actual Carter Lists posted here for these carbs by Carter Model number....
This one actually came to me in a Sears box, probably 1970's vintage. I may still have the box....John, The Carb Shop, suggested a rebuilt on the one I show because of the use of aluminum plugs instead of brass. I do not know....
The triangular ID tags can be had...
Also, FWIW, there was a difference in the TPI count on one of the plugs also different compared to an earlier carb I have. And an aluminum one installed on this carb was the wrong TPI but forced into place into the threads on the body......minor damage only. But it suggests a reproduction or aftermarket part.
I have/had several WO carbs for comparison purposes and parts etc.
No worries.
Thanks. Edited by Howard - 01 Feb. 2010 at 9:51pm |
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Howard F Jewett
1946 CJ2A #23353 43 GPW 106505 USA #20366014 43 Bantam Trailer T3 #14844 52 M100 K1119 |
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sean
Moderator Group Sponsor Member Joined: 20 July 2005 Location: North Idaho Status: Offline Points: 7388 |
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Howard:
Regardless, if that's a "rebuild", someone went to great time & effort to get every little detail correct! That's far beyond the typical rebuild.
What does your tag read? I'm curious, cause I see no patent numbers on the bowl. From what I understand, the Zenith manufactured carbs didn't include patent numbers, but the tags read "Z636S" or "636Z", can't recall offhand. Sean |
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Howard
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Thank You, Those Carter Drawings are exactly what I was looking for! Now added to my library too! I don't care for this ID tag...it is stamped 1942 as well as 636SA...that can't be correct.(?) Another suspicious clue as to originality...I think Ron has the ID tags in one of his plastic small parts boxes...I can not remember...but they are/were out there
Edited by Howard - 02 Feb. 2010 at 3:00pm |
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Howard F Jewett
1946 CJ2A #23353 43 GPW 106505 USA #20366014 43 Bantam Trailer T3 #14844 52 M100 K1119 |
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Hamhog
Member Joined: 05 Jan. 2008 Location: Havelock NC Status: Offline Points: 1670 |
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I've got the same one, nos. It came with the original sales receipt with a date of May 1977.
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Dave
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ed1johnson
Member Joined: 13 Oct. 2009 Location: OHIO Status: Offline Points: 4 |
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The carb looks like a rebuild because it has a steel adjusting screw instead of the original brass.
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If I don't have it I will help find it.
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tbssic
Member Joined: 31 Oct. 2010 Location: P.A Status: Offline Points: 19 |
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Exactly what I was looking for.......... Thanks sooooooo much.........
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clark2334
Member Joined: 12 Mar. 2011 Location: Wyoming Status: Offline Points: 2 |
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Thanks for sharing these information SEAN! Just what I'm looking for.
By the way, where's the best place to get these carburetors?
Edited by clark2334 - 12 Mar. 2011 at 2:22am |
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fasilpereira
Member Joined: 06 Feb. 2024 Location: Brazil Status: Offline Points: 4 |
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Does anyone have a picture showing how to hook the throttle cable to the Carter 636 SA carburetor? Although it has the cable attachment clip on the upper part, it doesn't seems to have a place for the cable on the throttle arm like the 636S carbs does.
Thank you, Fabricio
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