Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 676-11610-10 0.25 Viewer:823 OEM No. : 676-11610-10-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 688-11631-81 STD Piston Kit 6L1-11642-11 STD Gasket, Valve Seat 6A1-13621-00-00/6A1-13621-A0-00 Gear, Reverse 318304/0318304(29T)