Shop by Brand Mercury OutboardBearing Back Needle Bearing 31-160521 Viewer:131 OEM No.:31-160521 For Mercury outboard 9.9, 15, 18 HP 2 & 4 Stroke You May Also Be Interested In Needle Bearing 31-880856/880856 Roller Bearing 31-30956/30956 Power Head Gasket Set 27-898103A67/898103A67 Pin, Push 57632-98501-000