Dutchprops Posted November 5, 2012 Share Posted November 5, 2012 Hi, Does anybody knows what type of modern sparkplugs you can use for the Continental R975 C4 engine. I can't find a reference table from the old types to the new ones. I am now using the Champion 63 S, but they are not available anymore. Kind regards Dutchprops Quote Link to comment Share on other sites More sharing options...
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