Arnold E3 13/16 x .75 Spark Plug E3.18

The E3.18 lawn and garden spark plug is designed to optimize performance for 4-cycle, overhead valve small engines, making it the ideal choice for a wide variety of lawn and garden applications. It features a 14 mm. thread diameter and 0.750" reach with a gasket seat. The patented DiamondFIRE ground electrode delivers enhanced power, improved fuel efficiency, and a significant reduction in hydrocarbon emissions. Its innovative design helps to create an edge-to-edge spark path, promoting more complete combustion and better overall engine performance. Its proven ability to increase power by 6% to 12% (depending on engine class), improve fuel efficiency by 4% to 13%, and reduce CO and hydrocarbon emissions makes the E3.18 an eco-friendly option.