Spark Plug Stock 5122

The NGK Spark Plug Stock 5122 (BR7ES) is a resistor-type spark plug engineered for reliable ignition across a broad range of small engines and power equipment. This 14mm threaded plug with a 0.749-inch reach and gasket seat design delivers consistent spark performance in demanding operating conditions, making it a trusted choice for maintenance professionals and equipment operators who depend on dependable cold-start reliability and steady-state combustion.

Specified as part of NGK's standard-duty spark plug line, the BR7ES incorporates resistor technology to suppress electromagnetic interference and reduce radio frequency noise—critical in applications where clean ignition signals maintain fuel efficiency and engine responsiveness. The gasket seat design ensures a positive pressure seal without requiring a crush washer, simplifying installation and reducing the risk of over-torquing. The verified 0.749-inch reach matches OEM specifications for engines where this dimension is critical to proper piston-to-electrode clearance and combustion chamber function.

The NGK BR7ES serves lawn and garden equipment, small displacement motorcycles, ATVs, generators, and utility engines that operate in both high-temperature and variable-load scenarios. Users who maintain equipment in outdoor and off-season environments benefit from this plug's resistance to fouling and its proven longevity through repeated cold-start cycles. The resistor design also extends service intervals by protecting ignition electronics from voltage spikes.

NGK is recognized globally as a leading manufacturer of OEM and aftermarket spark plugs, with a reputation built on precision engineering and quality control. The BR7ES is a direct replacement or upgrade path for operators seeking a name-brand plug that meets or exceeds the ignition demands of legacy and current-generation small engines. Stock the Spark Plug Stock 5122 for routine maintenance, emergency repairs, or seasonal equipment preparation.