Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 646-11631-01 STD Viewer:1318 OEM No. : 646-11631-01-STD For YAMAHA Outboard 2 HP You May Also Be Interested In Piston Pin 6G5-11633-00 Piston Kit 644-11631-03 STD Outer Plate, Cartridge 61N-44323-00-00 Piston Ring 12140-96350-000 STD