Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F5-11635-00 0.25 Viewer:1299 OEM No. : 6F5-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 664-11610-20 0.50 Piston Kit 66T-11631-00 STD Power Head Gasket Set 27-898101A06/898101A06 Bolt 90119-08M14-00