Shop by Brand Mercury OutboardGasket/Gasket Kit Back Gasket Kit 27-78028A78 Viewer:116 OEM No.: 27-78028A78 For Mercury outboard 35, 40 HP You May Also Be Interested In Gasket 27-8129398/812939 8 Gasket 27-96542-1/96542 1 Piston Ring 3F3-00011-2/3F3000112M STD Gasket, Float Chamber 676-14984-00-00