Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 646-11631-01 STD Viewer:1299 OEM No. : 646-11631-01-STD For YAMAHA Outboard 2 HP You May Also Be Interested In Piston Ring 6D3-11603-00-00 STD Piston Ring 656-11610-11 0.25 Reverse Gear 6N0-G5571-00-00(27T) Gasket, Water Pump Housing Plate 27-16160/16160