MERCURY OEM STERNDRIVE, BRAVO XR SM (1.35:1 RATIO) (LONG - INTEGRATED TRANSOM SYSTEM) *{- NOTE: THE COMPLETE BRAVO I SPORTMASTER DRIVE UNITS ARE NO LONGER AVAILABLE. ORDER DRIVESHAFT HOUSING ASSEMBLY 1589-865440H73 AND LOWER GEAR HOUSING ASSEMBLY 1600-883608T31. SN# - 5F36911HH | boats.net