Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 689-11631-00 STD Viewer:943 OEM No. : 689-11631-00-STD For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Ring 6E5-11610-10 0.25 Piston Ring 688-11604-A0-00 0.25 Seal 26-421021/421021 Piston Ring 351-00011-0/351000110M STD