Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 689-11631-00 STD Viewer:942 OEM No. : 689-11631-00-STD For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 6D0-11631-00 STD Piston Kit 6E7-11635-00-00 0.25 Cover, Water Inlet 6P2-45215-00-00 Piston Ring Set 12140-91J10-000