Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11636-00 0.05 Viewer:1124 OEM No. : 6F6-11636-00-0.50 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 676-11610-00 STD Piston Kit 61A-11646-00 0.50 Bushing 647-45316-09 O-Ring 345-65015-0/345650150M