Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11636-00 0.50 Viewer:813 OEM No. : 679-11636-00-0.50 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 656-11610-00 STD Piston Kit 6J8-11631-02 STD Bolt 90101-12M37-00 Connecting Rod Kit 6G1-11650-00