MERCURY OEM STERNDRIVE, BRAVO XR SM (1.35:1 RATIO) (SHORT - STANDARD) *{- NOTE: THE COMPLETE BRAVO I SPORTMASTER DRIVE UNITS ARE NO LONGER AVAILABLE. ORDER DRIVESHAFT HOUSING ASSEMBLY 1589-865440H56 AND LOWER GEAR HOUSING ASSEMBLY 1600-883608T32. SN# 0M955633 B - 5G36901HH | boats.net