Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11636-00 0.50 Viewer:820 OEM No. : 679-11636-00-0.50 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 682-11636-00 0.50 Piston Ring 61N-11604-00-00 0.25 Gasket, Oil Pan 3H6-07402-0/3H6074020M Socket, Fuel Hose 65750-98505-000