Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-20 0.50 Viewer:745 OEM No. : 664-11610-20-0.50 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 6L1-11642-11 STD Piston Ring 682-11610-00-00/682-11610-01-00 STD Bearing 93306-306V2-00 Gasket, Starter 6E5-14979-00-00