Mercury - M-Icon 39mm Decal V12 Series High-Gloss Marine Finish 8M0179371. Overview. There's something about keeping your engine looking sharp that just feels right. When you walk down the dock and catch that familiar gleam from your Mercury cowling, you know you've taken care of the little things-those small details that say you truly respect your time on the water. The Mercury M-Icon 39mm Decal 8M0179371 keeps that confidence alive. It's a small piece, sure, but when your V12 Verado or SeaPro