Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-20 0.50 Viewer:766 OEM No. : 664-11610-20-0.50 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Ring 6R5-11604-00-00 0.25 Piston Kit 66T-11631-00 STD Crank 3 6K5-11432-00-00 Bearing 93315-43061-00