Spark Plug # 5129

The NGK Spark Plug #5129 (DPR7EA-9) is a standard resistor-type spark plug engineered for reliable ignition performance in small engines and compact automotive applications. With a 12mm thread diameter and 0.749-inch reach, this plug is designed to seat precisely in engines requiring gasket-seat installation. NGK's resistor design suppresses electromagnetic interference while maintaining consistent firing characteristics across varying load conditions, making this spark plug suitable for both routine maintenance and performance tuning applications.

The DPR7EA-9 features NGK's proven electrode geometry and ceramic insulator construction, which work together to ensure stable combustion and extended service life. The gasket seat design provides a secure seal without requiring a crush washer, simplifying installation and reducing the risk of over-torquing. This spark plug is commonly specified for lawn equipment, generators, small recreational vehicles, and light-duty portable power tools where dependable ignition is essential for engine start-up and operational stability.

Buyers choosing the NGK DPR7EA-9 benefit from a manufacturer with over 80 years of ignition expertise and a track record of OEM specification across multiple equipment categories. Whether replacing a worn plug during seasonal maintenance or standardizing on a proven part for fleet equipment, this spark plug delivers the consistency and durability expected from NGK's catalog. The compact 0.09-pound weight and small profile make it easy to stock and manage across multiple engines and applications.