E3 E3.10 Spark Plug, 13/16 in Fill Gap, 14 mm Thread, 13/16 in Hex, For: Two-Cycle, Four-Cycle Engines

E3.10 is a 14 mm, 3/8 in reach plug with a gasket seat. It is used in multiple small engine applications, especially lawn and garden. The ground electrode is designed with E3's patented DiamondFIRE technology which is proven to improve power, increase fuel efficiency and dramatically lower hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance over an extended product life.