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  1. July 5th, 2010, 06:39 PM #1
    TamsBoat
    [OP] TamsBoat is offline
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    Default 1983 70hp johnson spark plug?

    Hello All,
    I have a 1983 johnson 70hp outboard. I need to know what spark plug goes with this engine and if it requires a gap and the size of the gap? Please help Me?!!!
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  2. July 5th, 2010, 06:53 PM #2
    Dhadley
    Dhadley is offline
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    Default Re: 1983 70hp johnson spark plug?

    If I were changing the plugs I'd use the QL77JC4s gapped at .035 with todays 87 octane fuel.
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