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Champion 647 M76R Industrial Spark Plug


  • Solid Copper Gasket

This item has been discontinued.
  • Description

    Retracted tip push-pin designed to place the spark out of the mainstream air/fuel flow. This makes it difficult to initiate a good flame front, but is necessary when valve or piston clearance is not sufficient for conventional plugs, or when boost pressures and/or fuel type can cause excessive combustion chamber temperatures. Constructed with a nickel shell for faster heat dissipation and copper-cored center electrode for further heat removal.

  • Product Specifications
    • Shell
    • Thread Diameter18mm
    • Thread Pitch1.5mm
    • Seat TypeGasket
    • Reach12.7mm (1/2")
    • Hex Size7/8" (22mm)
    • Terminal TypeRemovable Nut
    • Gap.016" (0.4mm)
    • Center Electrode
    • MaterialNickel
    • TypeStandard
    • Size2.0mm
    • ProjectionRecessed
    • Ground Electrode
    • MaterialNickel
    • TypePush Wire
    • Quantity1
    • Specifications
    • ResistorNo
    • Heat Range76
    • Torque SpecsCast Iron: 32-38 lb. ft. Aluminum: 28-34 lb. ft.
    • Part Information
    • BrandChampion
    • Replacement GasketA-678
  • Fitment

    Verify Fitment


    Sorry, no automotive applications are associated with this part.


    Sorry, no powersports applications are associated with this part.


    Sorry, no non-automotive applications are associated with this part.