SPARK PLUG
NGK6422 BPR7HS
FOR VOLVO PENTA, MERCURY/MERCRUISER AND EVINRUDE/JOHNSON

Thread Size: 14 mm
Thread Pitch: 1.25 mm
Resistor Value: 5K Ohm
Reach: 12.7 mm (1/2″)
Hex Size: 13/16″ (21 mm)

Center Electrode
Material: Nickel

Ground Electrode
Material: Nickel