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Thread: Jump Start Procedure

  1. #1
    Registered User lcord's Avatar
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    Default Jump Start Procedure

    Hello


    First let me say, I'm a new owner. I need to jump start my 72' 240Z. Do you connect the red clamp to the positive post and and negative clamp to the negative post on these 240z's or do you just attach the red clamp to the positive post and the black clamp to a solid metal component. The Chilton book says to connect clamps to both posts but I normally do the latter. Just wondering if its different for these cars. Don't want to mess up.

    LC

  2. #2
    Mickey's Zpeedshop Garagegoon's Avatar
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    1972 Datsun 240Z
    HLS30-50836 (10/71)

    CZCC # 16889
    Dave

  3. #3
    Registered User Zealous's Avatar
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    Default

    I have previously jump started the old girl by connecting to both posts
    Cheers

    JC

    Current Project: 1971 Datsun 240z Series I - HLS30-14842
    Current drivers:
    1972 Datsun 240z - HLS30-69726
    2009 Kawasaki Ninja 250R
    2010 Mazdaspeed3

  4. #4
    Former frequent poster sblake01's Avatar
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    Default

    The reason you don't put the negative cable on the dead battery is because hydrogen gas, which forms as a battery discharges and loses its fluid is flammable, and a spark from the battery cables could, set it off. It's only a slight risk but it's more of a risk if the battery has been sitting for a long time with little or no air circulation.
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  5. #5
    Registered User lcord's Avatar
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    Default

    Thanks Guys!

    LC

  6. #6
    Supporting Member EScanlon's Avatar
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    Default

    Just make sure you CORRECTLY identify the Positive terminal.

    Some folks ass-u-me that it is automatically the one closest to the engine, when in fact the positive post is the one UNDER the fender (unless a PO bought a reverse pole battery). This presumes the car is a LHD car, since in RHD cars it's generally NOT a problem, the battery switches sides.

    FWIW
    E

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