NGK Spark Plug Stock # 3722

The NGK Spark Plug Stock #3722 (BR5HS) is a standard-heat-range spark plug designed for small-displacement gasoline engines commonly found in motorcycles, ATVs, generators, lawn equipment, and marine applications. This reliable resistor-type plug ensures dependable cold-start ignition and consistent combustion performance across various operating conditions, making it an excellent OEM-equivalent replacement for both routine maintenance and emergency repairs.

Featuring a 14mm thread diameter and a reach of 0.5 inches, this NGK plug is designed to mount flush with a gasket seat, ensuring proper compression and sealing. The resistor core effectively suppresses radio frequency interference (RFI), which is crucial for modern small-engine equipment where EMI suppression impacts fuel economy and emissions control. NGK's precise manufacturing tolerances and electrode gap ensure consistent spark timing and minimize misfires compared to generic alternatives.

This spark plug is ideal for anyone maintaining small-displacement recreational or utility engines, including dirt bike riders changing plugs between seasons, ATV owners preparing for hunting trips, generator operators stocking spare parts, or marine technicians needing replacement inventory for outboard engines. Its standard heat range accommodates moderate to high-RPM operation, making it a versatile choice for various applications.