23 Reo 221 #1 Posted April 18, 2017 I have a K301S, Spec 47147C which I think is a 1969 on my 68 Charger 12. What is the correct spark plug and gap for this motor? Share this post Link to post Share on other sites
953 nut 51,719 #2 Posted April 18, 2017 The correct spark plug is a Champion RH-10C with a gap of .035 presuming you have a battery ignition system, .025 with a magneto. Share this post Link to post Share on other sites
.thumb.jpg.e027905726836f41d35a27e60c2cb4f9.jpg)