Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-20 0.50 Viewer:768 OEM No. : 664-11610-20-0.50 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 6F5-11635-00 0.25 Piston Ring 688-11605-A0-00 0.50 Piston Kit 12110-94300-000 STD Crank 677-11412-00