NGK Spark Plug Stock # 3365

The NGK Spark Plug Stock #3365 (CMR6H) is a resistor-type spark plug engineered for reliable ignition across a wide range of small-displacement engines. Featuring a 10mm thread with a 0.500-inch reach and gasket seat design, this NGK spark plug delivers consistent performance in both standard maintenance applications and field use where dependable starting and combustion are essential.

The CMR6H utilizes NGK's resistor technology, which suppresses radio frequency interference while maintaining proper electrode gap for clean, complete combustion. The gasket seat configuration ensures a secure seal in the cylinder head, preventing compression loss and eliminating the need for additional sealing washers. The 10mm thread diameter and 0.500-inch reach specification make this plug compatible with engines where these dimensions are specified, providing drop-in compatibility without modification.

Operators in marine, outdoor power equipment, and small engine maintenance rely on NGK spark plugs for consistent cold-start performance and longevity under varying load conditions. The CMR6H is particularly suited for equipment where OEM spark plug specifications call for this exact model number, ensuring your engine ignition system performs to factory standards. This is a single-unit plug sold individually.

NGK spark plugs are recognized in the small-engine and powersports markets for precise manufacturing and reliable operation across temperature extremes. Stock the CMR6H when direct OEM part matching is required, or as a replacement when your engine's performance shows signs of fouled or worn ignition.