Reply To: Surface gap plugs L78v for a 4hp Merc

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January 9, 2022 at 9:10 pm #252691
JACQUES
Participant

    ok read Clymer again … 1969 Mercury mdl 40 4hp plug Champion L9J or AC-M45FF gapped at 0.030 ”

    another chart shows NGK B5HS or Champion L90 L90C L86C

    Joining AOMCI has priviledges 🙂

    • This reply was modified 4 years, 10 months ago by JACQUES.