1957 McCulloch/Firestone 3.6hp boat motor

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  • May 15, 2015 at 3:24 am #1495
    davef57
    Participant

      Can someone tell me what spark plug and gap that I will need for my 1957 McCulloch/Firestone Tire &Rubber 3.6hp boat motor? It is a model 133-7-1075.

      May 15, 2015 at 5:19 am #16014
      retiredoz
      Participant

        The book says Champion H10J (H10C nowadays) or equivalent, gapped at .035.

        May 16, 2015 at 2:27 am #16082
        davef57
        Participant

          Thank you for the information.

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