Reply To: Correct spark plug?

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September 17, 2021 at 6:58 pm #246813
elgin2
Participant

    US Member

    I wish it was 3 cylinders. They’re about as rare as hens teeth. It’s a twin.

    Mumbles wrote:

    Two cylinder or three cylinder?

    Two cylinder call for Champion QL77JC4, QL82C, or L78V. NGK equivalents would be BZ7HS-10, BR7HS, or BUHW-2.

    Three cylinder motors use QL86C or BR6HS plugs.

    NGK plug numbers with a -10 suffix means the plug has been gapped at the factory to 1mm, or .040″.