Fits most Briggs and Stratton Tecumseh side valve engines, equivalent to champion RJ17, RCJ8 & NGK BR4LM
21mm (13/16") hexigon
3/8" reach
Fits most Briggs and Stratton Tecumseh side valve engines, equivalent to champion RJ17, RCJ8 & NGK BR4LM
21mm (13/16") hexigon
3/8" reach
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