Shop by Brand Yamaha OutboardGasket/Gasket Kit Back Gasket, Valve Seat 6F5-13621-00-00/6F5-13621-A0-00 Viewer:687 OEM No.: 6F5-13621-00-00/6F5-13621-A0-00 For YAMAHA outboard 40 HP You May Also Be Interested In Gasket, Head Cover 61N-11193-00-00/61N-11193-01-00 Gasket 6G8-14198-A0-00 Piston Ring 39-19721A1/19721A 1 0.015 Thermostat 8M0117413