Defender Home Page
Phone: 800-628-8225 Fax: 800-654-1616 Int'l.: 860-701-3400 Email: Contact Us
Follow us on Facebook
Shipping Info
Defender Home Page
Your Cart
null View Cart View Shopping Cart
null Check My Order(s)
null Track My Package(s)
Conversion Chart
Shopping Areas
Boats & Motors
null Defender Seal null
promo A
promo B
promo C
promo D
Champion L77JC4 / BRP 502194 / 821 Spark Plug

Champion L77JC4 / BRP 502194 / 821 Spark Plug

  • Applications: Evinrude, Johnson, OMC Outboards and Inboards (See Models Below)
  • Copper Electrode, Non-Resistor
  • Check Your Owner's Manual For Proper Fit
  • Item #: 
    Model #: 


    Shipping Weight: 
    0.10 Lbs.
    List Price: 
    Our Price:
    Status:  null In Stock



    • Champion Copper Plus® spark plug technology began as an automotive OE plug, and today is widely used in a variety of power equipment applications
    • The nickel alloy center and ground electrode provide good wear characteristics and the extrusion of copper into the center electrode allows for an increase in conductivity and heat control
    • Champion Copper Plus® spark plugs are a great choice for OE-replacement on older automotive engines, lawn and garden applications and similar engines
    • Provides dependable performance and durability
    • The Copper core center electrode allows accurate control of heat range, optimizing plug performance and longevity


    • Thread diameter: 14 mm
    • Thread reach: 12.7 mm
    • Seat type: Flat
    • Hex size: 21 mm (13/16")
    • Tip configuration: Non-Projected
    • Construction: Standard construction
    • Terminal type: Solid

    Marine Applications:

    • Bombardier 3 HP, 4 HP, 6 HP, 8 HP, 9.9 HP and 15 HP 2-Stroke Outboards 1977 and Newer
    • Bombardier 20 HP and 25 HP 2-Stroke Outboards 1978 and Newer
    • Yamaha 225 (EFI) V76, SW, VMAX (1999-98) 225 HP
    • Yamaha 225, 225SW, L225, 3.1L, V76X (1999-94) 225 HP
    • Yamaha 250 (EFI) V76, SW, VMAX (1999-98) 250 HP
    • Yamaha LX225 (EFI) (2000) 225 HP
    • Yamaha LX250 (EFI) (2000) 250 HP
    • Yamaha SX225 (EFI) (2000) 225 HP
    • Yamaha SX250 (EFI) (2000) 250 HP
    • Yamaha V Max (EFI) OX66 (2002) 250 HP

    Note: There are more outboard motor applications for this spark plug that are not listed here. See your Owner's Manual to confirm compatibility.

    Cross Reference for Champion L77JC4:

    • AC Delco M41FF
    • AC Delco S40F
    • AC Delco M40FFX
    • Accel 156
    • Autolite 2634
    • Autolite 4092
    • Beck Arnley 176-5006
    • Bosch W280S1S
    • Bosch W340S1S
    • Bosch WO8AS
    • Bosch W250T1
    • Bosch W4AC
    • Bosch W3AC
    • Bosch W280T13S
    • Bosch W3AS
    • Brisk N14C-1
    • Champion L4G
    • Champion L77JC
    • Champion L77J4
    • Champion Stock 821
    • Denso W31FS
    • Denso TR22-10
    • Denso IWF27
    • Denso W27FS-U
    • Denso W27FS-GU
    • Denso W31FS-GU
    • Denso W27FSU10
    • Denso W27FS-U10
    • Denso W27FC
    • Denso Stock 6052
    • Denso Stock 4052
    • Denso Stock 6028
    • General Motors 5613452
    • General Motors 5613574
    • Motorcraft AE901Z
    • Motorcraft AV701CU10
    • Motorcraft AV901X-4
    • Motorcraft AV091X4
    • Motorcraft AV091X-4
    • Motorcraft AV901X4
    • Motorcraft AV91X-4
    • Motorcraft Stock 116
    • Newstar E12C
    • NGK B9HS-10
    • NGK B10HS
    • NGK B9HV
    • NGK B9HS
    • NGK B10H
    • NGK B9HCS
    • NGK B9HVX
    • NGK B7HS10
    • NGK B7HS-10
    • NGK Stock 5810
    • NGK Stock 2129
    • NGK Stock 3626
    • Splitfire SF263D
    • Torch E7C-10

    IMPORTANT: This chart is furnished as a guide only. Certain design differences may exist between this spark plug and another manufacturers and heat ratings can also vary. Always refer to the Manufacturer's application data to select the recommended spark plug for your specific engine



    Have A Suggestion?

    Help us make our site better for everyone! Let us know you've found something wrong or frustrating on this page and we will improve it. Please mark each that apply.

    Product has been improperly categorized
    Page loads too slowly
    Product information is incorrect
    Page has errors or bugs
    Site is frustrating or difficult to use
    Product image is missing or wrong
    Cannot find my size
    Spelling errors on page
    Not enough product information

    Comments or Examples:
    Examples: Missing information such as dimensions and model number, typos, inaccuracies, etc...

    Please include your e-mail address below if you would like us to respond to your comments or questions.             

    Join Our Email List And Receive our Monthly Promotions
    Defender Email Specials
    Click Here For Our Privacy Policy