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F 134 Fuel Pump

Discussion in 'Early CJ5 and CJ6 Tech' started by Primer Coat, Sep 13, 2023.

  1. Sep 13, 2023
    Primer Coat

    Primer Coat New Member

    Ohio
    Joined:
    Jul 17, 2017
    Messages:
    32
    Quick couple of questions about a 62 CJ5 F 134 engine fuel pump.

    It is a double action and I want to know what fuel pressure it operates at with the spacer, and without the
    and without the spacer. Also would a single action pump deliver similar pressures.

    Also are the bolt holes deep enough to run without the spacer or would shorter bolts be needed.

    Thats all thanks
     
    Primer Coat, Sep 13, 2023
    #1
  2. Sep 14, 2023
    Rick Whitson

    Rick Whitson Detroit Area 2024 Sponsor 2022 Sponsor

    I live South of...
    Joined:
    Dec 2, 2014
    Messages:
    1,732
    Welcome from Michigan, You need the spacer, it is a shim to make the fuel pump arm sit on the right spot of the cam for the right stroke of the fuel pump. If you don't put the spacer on it might over pump fuel and flood the carb. I have a single stage pump on my motor, I have electric wipers and don't need the vacuum pump that is on the factory fuel pump.
     
    Rick Whitson, Sep 14, 2023
    #2
  3. Sep 14, 2023
    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:
    9,834
    The Carter YF carb on an F-head wants about 2.5 or 3 psi delivered pressure.
     
    PeteL, Sep 14, 2023
    #3
    Rick Whitson likes this.
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