Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11635-00 0.25 Viewer:853 OEM No. : 679-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 664-11631-00/664-11631-01 STD Piston Kit 689-11631-60 STD Shim 12-8M0050439/8M0050439 Gasket, Exhaust Pipe 3C8-02312-0/3C8023120M/3C8-02312-2/3C8023122M