Shop by Brand Mercury OutboardBearing Back Needle Bearing 31-160521 Viewer:106 OEM No.:31-160521 For Mercury outboard 9.9, 15, 18 HP 2 & 4 Stroke You May Also Be Interested In Needle Bearing 31-803734/803734 Bearing 31-42647A1/42647A1 Propeller 6G1-45941-00-EL Drive Shaft Comp. 63P-45501-00-00