Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-00 STD Viewer:793 OEM No. : 664-11610-00-STD For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Ring 63D-11605-00-00 0.50 Piston Ring 6R5-11603-00-00 STD Insert 161572 Cover, Water Inlet 6P2-45215-00-00