Pack of 6 Genuine NGK 4551 Spark Plugs BR9HS10 Mercury/Yamaha Marine Outboard

Stock Number: 4551
Part Number: BR9HS-10
Material Grade: Nickel/Copper
Resistance (Ohms): 5000.0
Ground Electrode Tip Design: Standard
Ground Configuration: J-Gap
Ground Electrode Core Material: Nickel
Washer Included: Yes
Electrical Terminal Type: Removable Nut
Center Electrode Core Material: Copper
Center Electrode Tip Material: Nickel
Pre-Gap Size (IN): .040
Pre-Gap Size (MM): 1.0
Ground Electrode Quantity: 1
Hex Size: 13/16"
Insulator Height (IN): 2.14
Insulator Height (MM): 54.3
Manufacturer Heat Range: 9
Seat Type: Flat
Reach (IN): 0.500
Reach (MM): 12.7
Thread Diameter (IN): 0.551
Thread Diameter (MM): 14.0
Insulator Material: Ceramic
Resistor Type: Yes
Ground Electrode Tip Material: Nickel
Skirt: No
Center Electrode Insulator Tip Projection (IN): 0.04
Center Electrode Insulator Tip Projection (MM): 1.0
Center Electrode Design: Standard
Washer Type: Crush
Center Electrode Projection: Non-Projected
Grade Type: Standard Replacement