I have a 1982 Mercruiser 5.7 MCM 260 serial 6817160. I installed Champion RV91MC plugs, based on the book at West Marine. After noticing the difference in tip length, I removed them and checked for signs of contact and saw nothing.
My Clymer manual shows AC MR43T and my Seloc shows Champion RBL8 or AC MR43T.
Should I yank them and what is the correct plug?
My Clymer manual shows AC MR43T and my Seloc shows Champion RBL8 or AC MR43T.
Should I yank them and what is the correct plug?
