Shop by Brand Yamaha OutboardRetainer Back Retainer Pinion Assy 66T-81857-00 Viewer:983 OEM No.: 66T-81857-00 For YAMAHA outboard 40 HP You May Also Be Interested In Retainer 6N7-81857-00-00 Retainer 6E5-81857-00 Housing 816728 5 Oil Seal 345-00122-0/345001220M