Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-10 0.25 Viewer:670 OEM No. : 664-11610-10-0.25 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Ring 6R5-11603-00-00 STD Piston Ring 6E5-11610-10 0.25 Piston Kit 61A-11646-00 0.50 Drive Shaft Comp. 692-45501-21-00