Shop by Brand Mercury OutboardBearing Back Needle Bearing 31-160521 Viewer:112 OEM No.:31-160521 For Mercury outboard 9.9, 15, 18 HP 2 & 4 Stroke You May Also Be Interested In Bearing, Main Upper 31-855553/855553 Bearing 31-884325T01/884325T01 Propeller Shaft 41161-ZV5-000 Impeller 389576/0389576