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#74990
Buccaneer
Participant

    US Member

    Thanks David and Westwind. Looks like both
    plugs are readily available too!
    Just bought the NGK AB-7.
    They’re exactly in the middle of the NGK heat range,
    as is the original specified Champion R-7

    The AB-7 specs show it as Non-Resistor, 1/2" reach and
    with a removable nut. Perfect!

    Shell
    Thread Size: 18mm
    Thread Pitch: 1.5mm
    Seat Type: Gasket
    Resistor: No
    Reach: 12mm (.472")
    Hex Size: 13/16" (21mm)
    Terminal Type: Removable Nut
    Overall Height: ISO
    Gap: .028" (0.7mm)
    Center Electrode
    Material: Nickel
    Type: Standard
    Size: 2.5mm
    Projection: Non-Projected
    Ground Electrode
    Material: Nickel
    Type: Standard
    Quantity: 1
    Specifications
    Torque Specs: Cast Iron: 25.3-32.5 lb. ft. Aluminum: 25.3-28.9 lb. ft.
    Brand: NGK
    Heat Range: 7
    Longevity: 30k

    Prepare to be boarded!