Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 676-11610-20 0.50 Viewer:819 OEM No. : 676-11610-20-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 689-11635-00 0.25 Piston Kit 689-11631-60 STD Gasket 318924/0318924 Gasket, Body 648-24434-00-00/648-24434-01-00