Shop by Brand Mercury OutboardGasket/Gasket Kit Back Gasket Kit 27-78028A78 Viewer:98 OEM No.: 27-78028A78 For Mercury outboard 35, 40 HP You May Also Be Interested In Gasket, Water Pump Housing Plate 27-16160/16160 Powerhead Gasket Kit 27-815791A92 Gasket, Head Cover 61N-11193-00-00/61N-11193-01-00 Piston Ring 39-96170A4/96170A 4 0.030