Champion 821 - Copper Plus™ Spark Plug - Small Engine
$840
Package Price for 4 Units
@ $2.10 per unit
In stock
limited availability at this price!
Pay over 3-12 months with 
. Learn more
. Learn more
CHAMPION part description
Product Description
Copper Plus Small Engine Spark Plug L77JC4 Carton of 4
Application Summary
POWERSPORT
Features & Benefits
- Copper Plus - Dependable Performance and Durability
- OE type replacement plug
- Resists fouling
- Copper core center electrode allows for accurate control of heat range for longer life
- Superior corrosion resistance
- Built to ISO and SAE standards for proven performance
Product Attributes
| Ground Electrode Core Material | Nickel |
| Washer Included | Yes |
| Electrical Terminal Type | Non-Removable Nut |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | 0.030 IN |
| Ground Electrode Quantity | 1 |
| Hex Size | 0.813 IN |
| Manufacturer Heat Range | 77 |
| Seat Type | Flat |
| Reach | 0.5 IN |
| Thread Diameter | 0.551 IN |
| Resistor Type | No |
| 9507 | Hex |
| 9745 | Crush |
| 9746 | No |
| Center Electrode Diameter (inch) | 0.1 IN |
| Classification | Champion Copper Plus Small Engine |
| Ground Electrode Material | Nickel Copper Alloy |
| Installed Height (inch) | 2.24 IN |
| Part Description | Spark Plug |
| Plug Type | L77JC4 |
| Taper Diameter (inch) | 0.25 IN |
Additional Information
| Country of Origin (Primary) | MX |
| Harmonized Tariff Code (Schedule B) | 8511100000 |
| Harmonized Tariff Code (HTS) | 8511100000 |
| UPC | 00037551000678 |
| VMRS Code | 033003005 |
Part Interchanges
- Champion Spark Plug L77JC4
- DENSO W31FS
- NGK B10HS
- NGK B9HS
- NGK B9HS10
- NGK B9HV
- ACDelco M40FFX
- ACDelco M41FF
- Motorcraft AE091X
- Motorcraft AV091X4
- Bosch W4A
- Bosch W4A1
- Bosch W4A2
- Bosch W4A5
- Bosch W4AC
- Bosch W4AS
- Autolite 2634
- Bosch W3AC
- Champion Spark Plug L3G
- Champion Spark Plug L4G
- Champion Spark Plug L77J
- Champion Spark Plug L77J4
- Champion Spark Plug L77JC
- Motorcraft AE901Racing
- NGK 2721
- NGK 3626
- NGK 5810
- NGK B8HVX
- NGK B9HCS
- NGK B9HVX
- Beru Z37
- Mercury Marine 33821S
- Mercury Marine 33896329821
- DENSO 4065
Fits Vehicles
- Ski-Doo RV 250 (1976)
- Ski-Doo Olympique 300T (1978)
- Ski-Doo Citation 300 (1978)
- KTM 50 Mini Adventure (1998-1999)
- Cobra KING (1997)
- Kawasaki KX450 (1974)
- Kawasaki H1 Mach III (1972-1975)
- Kawasaki F7 (1971-1975)
- BMW R50/2 (1960-1969)
California Proposition 65 Warning
California Proposition 65 Warning
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov. (Read more)
Don't know your part number?
Take a photo and we'll identify it!
