Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-20 0.50 Viewer:758 OEM No. : 664-11610-20-0.50 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Ring 6H4-11601-10 0.25 Piston Pin 62T-11633-00-00 Cover Assembly 8M0047129 Impeller 47-F40065-2/F40065-2