1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

NOS Carter YF

Discussion in 'Early CJ5 and CJ6 Tech' started by Leathernek, Mar 22, 2013.

  1. Mar 22, 2013
    Leathernek

    Leathernek Member

    Northwest Georgia
    Joined:
    Mar 19, 2012
    Messages:
    110
    Hey guys,

    I made a major parts score yesterday and one of the items I picked up was a NOS Carter YF carb. Only thing is that is slightly different from the original one that was on my jeep in that the new one has some kind of plunger diaphragm on the side of it and does not have the tube at the top of the mouth of the carb. I'm at work so I don't have the model number but I do know that it is a YF. What are these weird accouterments and will it work on my F134? The guy I bought it from said they got it from an old Jeep dealership that went out of business so I know its Jeep but not sure what the year/application is. I'll post pics when I get home this evening.
     
  2. Mar 22, 2013
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,102
    The YF's were also used on AMC 6's & had emissions changes made to them. If your's has an extra air passage running up the same side that the throttle & choke shafts come out in place of the web with the part number cast into it then that's what you've got. These do not work at all well on F4's.

    H.
     
  3. Mar 22, 2013
    kamel

    kamel Senior Curmudgeon

    Erlanger, Kentucky
    Joined:
    Jun 10, 2003
    Messages:
    891
    It most likely was for a later model CJ with the F-134. I've got one in the shop with the dashpot and extra port that I removed from a '70 cj5 with the F-134. I think that it is a model 4002 or something like that. It oughta work in the earlier jeep engines; I would be concerned with the float valve -- not sure what that configuration was.
     
  4. Mar 22, 2013
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    9,754
    Carter YF was used on many vehicles over many years. You may need to check the jetting, etc to see if it's suitable.
     
  5. Mar 22, 2013
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    3,466
    The YF 938 SD was original on your 1963.
    You'll have to identify the specific Carter YF model to determine its correct application.
     
  6. Mar 22, 2013
    Leathernek

    Leathernek Member

    Northwest Georgia
    Joined:
    Mar 19, 2012
    Messages:
    110
    Here is the pic......the one on the left with the funny looking plunger is the carb in question. The model number on the new carb is 1899 and the old one that came on the jeep is 1538. What did each of these carbs originally go to?

    [​IMG]
     
  7. Mar 27, 2013
    Leathernek

    Leathernek Member

    Northwest Georgia
    Joined:
    Mar 19, 2012
    Messages:
    110
    Anyone know what this carter would have went on?
     
  8. Mar 27, 2013
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    9,754
    Take those numbers ands start googling....! Call the carb rebuild shops, etc.
     
  9. Mar 27, 2013
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    3,466
    Not Jeep stuff.
    The model numbers suggest original application was 1953 or 1954 vintage.
    That only narrows it down to a single barrel engine used in 53 or 54.
     
    Last edited: Mar 27, 2013
  10. Mar 27, 2013
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,102
    A Really BIG Briggs & Stratton?

    H. :twisted:
     
  11. Mar 27, 2013
    kamel

    kamel Senior Curmudgeon

    Erlanger, Kentucky
    Joined:
    Jun 10, 2003
    Messages:
    891
    I'm still voting for an emissions-controlled f-134.

    jeep went with a different yf model when they put the air pump and the air holes in the exhaust manifold. I have one that looks like it in my shop, although the one I have is in terrible shape.

    The Carter number is YF4002 and YF4002S. I don't know the difference between the two 4002's. They were jeep part numbers 939645 and 943193, respectively. They eliminated the hand throttle and put that little tube on the carb along with the dashpot. The needle valve and seats have a different part number from the "normal" YF, but I haven't compared them to see what is different about them.

    The repair kit for the 4002 is listed in the regular part manual (march, 1971). The carburetor itself is listed in the addendum for emissions controls.

    The one I have in the shop was from a 1970 cj5.

    I'd think that the 4002 should work on an earlier f-134 as long as you figured out what to do with the air tube and what the differences are in the needle valve and seat.
     
    Last edited: Mar 28, 2013
New Posts