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1977 Johnson 115 spark plugs

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  • 1977 Johnson 115 spark plugs

    book shows it to use L77J4 , what is the difference between these and L77JC4

  • #2
    Re: 1977 Johnson 115 spark plugs

    this is the updated list.
    115 1973 - 1979 QL16V Surface Gap or QL77JC4 gapped @ .030

    recomendend the QL77JC4 C stands for copper, Q is quiet, for electronics.
    FLORIDA GATORS
    TEBOW Country



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    • #3
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      Re: 1977 Johnson 115 spark plugs

      so your saying the L77JC4 is the correct plug

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