Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11635-00 0.25 Viewer:870 OEM No. : 679-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 64D-11631-00 STD Piston Ring 66T-11605-00 0.50 Water Pump Repair Kit 6AW-W0078-00-00 Lower Unit Gasket Set 3B7-87321-2/3B7873212M