Champion 828 828M BM50 CM50 RV 250 Olympique 300T 230R Marine Spark Plug QL77JC4

Small Engine Copper Plus Spark Plug
Copper core center electrodes allow for increased conductivity and heat control.
Conventional spark plug with nickel alloy electrodes
Shell
- Thread Diameter: 14mm
- Thread Pitch: 1.25mm
- Seat Type: Gasket
- Reach: 12.7mm (1/2" in.)
- Hex Size: 13/16" in. (21mm)
- Terminal Type: Solid
- Gap: .039" in. (1.0mm)
Center Electrode / Ground Electrode
- Material: Nickel
- Type: Standard
- Size: 2.5mm
- Projection: Non-Projected
Resistor: Yes
Resistor Type: Inductive
Heat Range: 77
Torque Specs: Cast Iron: 26-30 lb. ft. Aluminum: 18-22 lb. ft.
Manufacturer: Champion
Part Number: 828, 828M
Also Known As: QL77JC4
For use with:
1960 - 2000
Powersports
- Cobra
  - CM50 Base
  - BM50 Base
- Ski-Doo
  - Olympique 300T Base
  - RV 250 Base
- Kawasaki
  - H1 Mach III Base
- BMW
  - R50/2 Base
Snowmobile Engines
- Hirth
  - 230R
  - 231R
- Kohler
  - K440-2SS, 429cc, 1/2" Reach
  - K440-3RS, 429cc, 1/2" Reach
  - K645-3RS, 644cc, 1/2" Reach
  - K645-3SS, 644cc, 1/2" Reach
- Sachs
  - SA290R
  - SA290SS
  - SA340C
  - SA340R