MS171 Spark Plug: CMR6H
Suitable for the following Stihl models: MS171, MS181, MS192, MS211, MS231, MS241, BG56, BG66, BG86, BR500, BR550, FC56, FC70, FR130, FS130, FS240, FS310, FS360, FS410, FS40, FS460, FS56, FS70, HT130, HT131, HT56, KM130, KM56, SH56 and Stihl 4 Mix engines
Replaces: CMR6H
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