Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11631-00 STD Viewer:780 OEM No. : 679-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Pin 634-11633-00-00 Piston Kit 6R5-11646-01 0.50 Check Valve Assembly 646-11370-00-00 Piston Kit 435546/0435546 STD