Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 66T-11605-00 0.50 Viewer:823 OEM No. : 66T-11605-00-0.50 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 696-11631-00 STD Piston Kit 6E7-11636-00-00 0.50 Bearing 93332-00005-00 Gear 61N-45560-00-00(27T)