Shop by Brand Yamaha OutboardRetainer Back Retainer Pinion Assy 66T-81857-00 Viewer:1030 OEM No.: 66T-81857-00 For YAMAHA outboard 40 HP You May Also Be Interested In Retainer Pinion Assy 66T-81857-00 Retainer 6H1-81857-00 Piston Ring 39-826293A12/826293A12 0.015 Water Pump Repair Kit 6B4-W0078-0A-00