NGK Spark Plug Stock # 3323

The NGK Spark Plug Stock # 3323 (AR6FS) is a standard resistor-type spark plug engineered for reliable ignition across small engines and powersports equipment. This 18mm thread spark plug features a 0.370-inch reach with a tapered seat design, making it a direct replacement for applications requiring precise fitment and consistent spark delivery across varying load conditions.

NGK's resistor-type design suppresses electromagnetic interference while maintaining stable combustion across the RPM range, a critical consideration in both small-displacement engines and high-frequency operating equipment. The 18mm thread diameter and tapered seat geometry ensure secure seating and proper thermal transfer to the cylinder head, preventing fouling and extending service intervals. The AR6FS designation indicates compatibility with a wide range of small-bore and mid-range engine platforms commonly found in portable power equipment, recreational vehicles, and compact machinery.

This spark plug is ideal for equipment operators and technicians who require OEM-equivalent performance without premium pricing. Replacement of worn spark plugs at factory-recommended intervals maintains fuel efficiency, cold-start reliability, and reduces harmful emissions. The compact form factor and standard specifications make the NGK AR6FS a cost-effective maintenance item for anyone managing multiple small engines or powersports gear that demand dependable ignition performance.

NGK spark plugs are recognized across industrial, agricultural, and consumer equipment sectors for consistent quality and long-term availability, ensuring parts availability and compatibility across engine platforms and model years.