Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 676-11631-00 STD Viewer:978 OEM No. : 676-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 688-11631-81 STD Piston Kit 6H4-11635-09 0.25 O-Ring 93210-24M79-00 Power Head Gasket Set 3F3-87121-1/3F3871211M