Pump, Pump, Pump, Pump, Pump........Starting problems

Discussion in 'General IH Tech' started by Shannon 73 Scout, Oct 25, 2019.


  1. Shannon 73 Scout

    Shannon 73 Scout Farmall Cub

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    Good afternoon!

    '73 Scout II. 304 v8. Stock carb.

    I am overwhelmed when it comes to carbs. I will hopefully understand them much better in the future but for now, I just know the basics of how they work. With that being said, I live in Wisconsin and winter is coming (insert Game of Thrones jokes here lol) and I'm concerned that my baby will leave me stranded in the cold of winter.
    In the morning when I first start the engine, I have to pump the gas pedal 40 times or so and then continue to pump as I start the vehicle and get it to sustain a rough idle. After it warms up, it runs great. When I shut it off, I can re-start the engine with one turn, usually by pressing the gas pedal to the floor and just touching the ignition.
    The engine is running rich as I can smell the sweet smell of money, er I mean gasoline, constantly whilst driving.
    I know that Scouts often have cold start troubles, but pumping the accelerator 40 times seems a bit excessive. Could someone offer me some suggestions as to why this is occurring?

    Thank you in advance for your help!
     
  2. RDC279

    RDC279 Farmall Cub

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    Is the choke hooked up.
     
  3. Shannon 73 Scout

    Shannon 73 Scout Farmall Cub

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    The dash has a spot labeled for a choke but nothing installed.
     
  4. RDC279

    RDC279 Farmall Cub

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    Can you take a picture of your CARB. If you cant limit the cold air going in it will always start that way
     
  5. Shannon 73 Scout

    Shannon 73 Scout Farmall Cub

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    Here you go!
     

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  6. kevingweq

    kevingweq Y-Block King

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    Looks like you just need to install a choke cable , either an oem version or your choice of the many universal aftermarket cables available
     
  7. Patrick Morris

    Patrick Morris Lives in an IH Dealership

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    Not the stock carb. That is a later aftermarket Holley 2300. #7448. Good carb but could use a cleanup or rebuild, and definitely a choke cable.
     
  8. mallen

    mallen High Wheeler

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    Pumping 40 times should flood you out so bad it won't start at all. The fact that it does not suggests the accelerator pump may be bad. With the engine OFF , look down into the carb and move the throttle linkage through it's entire range,bad if you had just stomped the pedal. You should see nice streams of fuel squirt into both barrels. If you don't, there's a problem with the accelerator pump.
     
  9. RinTX

    RinTX High Wheeler

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    Start with a choke cable.
     
  10. RDC279

    RDC279 Farmall Cub

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    Is it just me or does the choke linkage look wrong?
     
  11. Patrick Morris

    Patrick Morris Lives in an IH Dealership

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    I noticed that long 'arm' coming off the front. Never seen anything like that before. I can't imagine why someone would swap out that part for something longer. But it shouldn't affect the choke operation anyway.
     
  12. Patrick Morris

    Patrick Morris Lives in an IH Dealership

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    That's a good point. If the pump was working, this would probably drain the bowl into the intake manifold.

    Also, did anyone else notice that vacuum line on the carb base, on the passenger side. The one with no hose attached? That can't be helping. I'm actually not familiar with that fitting. My 7448 does not have it.

    EDIT: According to this diagram, if the carb has that vac port on the base, it's actually a #4412 model, the 500 CFM version! Some would disagree, but this is probably too much carb for the 304 V8.

    [​IMG]
     
    Last edited: Oct 26, 2019
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  13. RDC279

    RDC279 Farmall Cub

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    I think that arm maybe holding it open
     
  14. INT77345

    INT77345 Farmall Cub

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    as others have said, get that choke hooked up, cable or an auto choke of some kind. it will never run good cold with out some kind of choke.
    dont get discouraged.... scouts will run just fine in the cold. i lived a year in Gunninson colorado winter temps were 20-30 below every night and the scout never let me down. started and drove it every morning.
     
  15. Patrick Morris

    Patrick Morris Lives in an IH Dealership

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    Based on what I know of the manual clutch linkage, I'm not sure how it could be doing that. Doesn't contact the critical components that I can see. It's completely Jerry rigged, whatever it is.

    This is why we always insist on seeing pics. One other thing about the setup. I'm spotting a possible issue we with the base gasket. Definitely not using the correct type. Should look like this, but I don't see any insulator projecting under the float bowl:

    [​IMG]
     
  16. scoutboy74

    scoutboy74 Lives in an IH Dealership

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    Should check the list number on the front of the airhorn on this carb. If it's a 4412, then it should be replaced anyway, functional choke or not.
     
  17. Patrick Morris

    Patrick Morris Lives in an IH Dealership

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    Good idea to verify it for sure.

    To the OP, illustrating what Scoutboy said, look here for that number:

    [​IMG]
     
  18. 1975IH200

    1975IH200 High Wheeler

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    What happened to your post from Oct. 4th?
    Fuel leaking from carb onto intake manifold
    No feedback from you at all on that one.
    What did you do, if anything?
     
  19. Patrick Morris

    Patrick Morris Lives in an IH Dealership

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    Hah. That's a good question. I knew that avatar looked familiar. Shannon, WTH?
     
  20. scoutboy74

    scoutboy74 Lives in an IH Dealership

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    Oh, snap!
     

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