Champion spark plug cross reference. Copper core center electrode allows for increased conductivity and heat control. 307") Hex Conventional spark plug with nickel alloy electrodes. 307") Hex Size5/8" (16mm) Terminal TypeSolid Gap. 1 mm or . The chart is intended to help users find the correct NGK spark plug to replace a worn out Champion spark plug. 6mm) Shell Thread Diameter14mm Thread Pitch1. Find the right Champion RJ19LM Spark Plug OEM Part for your small engines at LawnMowerPros. With thousands of spark plugs listed in our database, you can easily cross-reference spark plugs from various brands such as NGK, Bosch, Champion, Denso, and more. Dec 1, 2025 ยท The Champion Spark Plug Cross Reference Guide explains how to identify equivalent plugs across brands, interpret cross-reference numbers, and verify compatibility for engines in American vehicles. The Edelbrock web site states to use Champion RC12YC or equivalent.
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