Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 676-11631-00 STD Viewer:994 OEM No. : 676-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 656-11610-11 0.25 Piston Ring 61N-11605-00-00 0.50 Nut, Nylon 90185-05002-00 Gasket, Upper Casing 68F-45113-00-00