Spark Plug ACDelco MR43T Each, Quicksilver Part# 84-863656A03, Mercruiser OEM Service Part, Includes Wire set and Coil Wire, Quicksilver 84-863656A03 Mercruiser spark plug wire set. Fits Black Scorpion Tow Sports & MX 6. 2L Black Scorpion Tow Sports (S/N 0M391599 and up),