Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11636-00 0.50 Viewer:824 OEM No. : 679-11636-00-0.50 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 63D-11605-00-00 0.50 Piston Ring 656-11610-11 0.25 Gasket, Air Cleaner 6G5-14416-00-00 Gasket, Housing 52113-94300-000