Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11635-01 0.25 Viewer:544 OEM No. : 6H4-11635-01-STD For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Ring 688-11610-10 0.25 Piston Kit 6F6-11636-00 0.05 Primary Pump Assy 6AW-24360-01 Bolt 97095-06016-00