NGK 3722 BR5HS Standard Spark Plug
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Precision spark plug for smooth combustion
The NGK 3722 BR5HS Standard Spark Plug delivers reliable ignition for smooth combustion and stable engine performance. It is a standard nickel resistor spark plug designed for smaller 2-stroke outboard motors. Commonly used in Mariner and Yamaha 2 HP (2A/2B/2M) models, it is also compatible with select vintage Chrysler and Suzuki 2-stroke engines.
NGK 3722 BR5HS Standard Spark Plug Features:
- Built to NGK standards for long life and consistent performance
- High-quality OEM replacement
- Trivalent metal plating for strong anti-corrosion and anti-seizing protection
- Corrugated ribs help prevent flashover
- Pure alumina silicate ceramic insulator for strength and efficient heat transfer
- Copper core aids heat dissipation
- Triple seals help prevent gas leakage
- Designed for smaller 2-stroke outboard motors
NGK 3722 BR5HS Standard Spark Plug Specifications:
Shell:
- Model Number: BR5HS
- Part Number: 3722
- Thread Diameter: 14 mm
- Thread Pitch: 1.25 mm
- Seat Type: Gasket
- Reach: 12.7 mm (1/2")
- Hex Size: 21 mm (13/16")
- Terminal Type: Removable Nut
- Overall Height: ISO
- Gap: 0.6 mm (0.024")
Centre Electrode:
- Material: Nickel
- Type: Standard
- Size: 2.5 mm
- Design: Non-Projected
Ground Electrode:
- Material: Nickel
- Type: Standard
- Quantity: 1
Electrical Performance:
- Resistor: Yes (5k Ohm)
- Heat Range: 5
Installation:
- Torque (Aluminium): 25-30 Nm (18-21.6 lb-ft)
- Torque (Cast iron): 25-34 Nm (18-25.3 lb-ft)
Compatible Outboards:
- Yamaha: Various small 2-stroke engines, including 2A and 2B models
- Mariner: 2 HP and 2.5 HP 2-stroke outboards
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