Shop by Brand Mercury OutboardBearing Back Needle Bearing 31-160521 Viewer:122 OEM No.:31-160521 For Mercury outboard 9.9, 15, 18 HP 2 & 4 Stroke You May Also Be Interested In Bearing 31-12578T/12578T Bearing, Main Upper 31-855553/855553 Screw, Pan Head 98580-05016-00 Water Tube 42724A3