NGK CMR7H-10 Spark Plug

This is a short cold spark plug, suitable for engines such as, Zenoah, Chung Yang, Feulie, Dynamic and similar. The shaft length is 13 mm. Especially suitable for, among others, the FG Marder and Baja because of its short length, but fits any type of engine type indicated. This spark plug is more suitable for tuned engines, which have a higher compression ratio.

This CMR7H-10  version is a colder spark plug, so suitable for stock and tuned engines. When "Carbon Fowling" occurs (the darkening or blackening of the ceramic core), this forms a conductive layer, which means that the spark plug can normally spark outside the engine, but under pressure inside the engine it jumps to the edge, and therefore starts poorly or not at all. In that case, you can opt for the "hotter" version, the CMR6H-10, which is also ideal for use during engine break-in.

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