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Thread: 1904 questions

  1. #1
    Join Date
    Oct 2009
    Location
    upstate, NY
    Posts
    43

    Default 1904 questions

    Im having problems with the 1904 carb on my 196 4cyl. The engine will only run with the choke 3/4 of the way open, and is running at what sounds to be around 3000rpms. Nothing happens when i adjust the idle screw. I took the side cover off to reveal quite a bit of rust in there. The float and jet move good, but the horizontal "push rod" is stuck. I figure this carb had water in it at some point. Probably not worth rebuilding.

    I also have the carb off my 152, which i believe is also a 1904 series. However the base is different than the 196 carb. My question is, are the bases interchangable between these two carbs? Is the jetting the same?

    Lastly, I read somewhere that someone used a Rochester 2bbl carb on their 196. Does anyone have info on that? I have a Rochester 2G carb left over from a jeep build.

    Thanks in advance
    Joe
    Last edited by hillbilly4008; 11-09-2009 at 04:09 PM.

  2. #2
    Join Date
    Oct 2009
    Location
    Northern Indiana
    Posts
    60

    Default

    Hillbilly,

    I am no expert on carbs, but bought a 63 scout and had similar problems, it would only fire up when I primed it, and wouldn't even stay running. Anyway, I found a rebuild kit at autozone, $15.00 and cleaner with a basket to dip the carb/parts into (looks like a gallon of paint). NAPA had one too, but cost twice as much. Anyway, I cleaned and rebuilt it, it was very easy to do. If I can do it, anyone can. The engined fired right up and ran fine.

    I also replaced the fuel filter on the pump, and ran a line from a gallon of gas instead of hooking up the fuel line from the tank, which is really fouled up. Here is a link I found on the 1904 with detailed info on tear down and rebuild.
    http://www.tocmp.com/manuals/Carbs/H..._IHC_53B2.html

    Hopes this helps, I have read here that the Holley is not the best carb, but is sure simple to work on.

    Dan

  3. #3
    Join Date
    Oct 2009
    Location
    upstate, NY
    Posts
    43

    Default

    I traded a buddy of mine a Carter AFB for a Weber 32/36 today. Now i just have to get that adapter ordered.

    Im going to try it with stock jets, untill i can figure out the best combo for the 196.

    FWIW i swapped the carb bases from the two 1-bbl carbs today. The bore on the two carbs is an 1/8" different, but the bases worked. After i put it all togeather and put it back on the engine i still had the same problem. Fed up with the Holley carbs i decided the best route is definatly going to be Weber.

  4. #4
    Join Date
    Mar 2010
    Posts
    7

    Default another ?

    i've got a 220 engine with a 1904 on it. at about 1500 rpm it starts chugging like it's not getting fuel. Is there any way to adjust fuel in the top end?

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