Type of outdrive size and years
Mercruiser upper gearcase with eye hook	Square 4-1/2" x 4-1/2" 1972 thru 1983 and large 'eye' hook attached to cap Mercruiser parts help with tech drawings click here  for years 1972 thru 1983 upper-lower gearcase index page
Alpha One 1984 thru 1992 upper gear case drive	Mercruiser bell housing parts tech drawings Square 4-1/2" x 4-1/2" cap years 1984 thru 1992 Mercruiser Alpha 1 parts upper gearcase drawing outdrive parts main index page for upper and lower gearcase technical breakdown drawings
Alpha one generation 2 upper gearcase	Rectangular 4-1/2" x 6-1/2" cap •Alpha One Generation 2 outdrive years 1992 and up main index page for upper and lower gear case tech drawings
MerCruiser Bravo drive (picture)	1986 - up MerCruiser Bravo 1-2 parts website index page.

omcparts@rogers.com

Contact us ------- Return Policy ------- Core Return ------ About Us   Copyright 2013 ----Terms and Conditions ---- Credit card orders ---- Repairs International shipping rates ---- Boating/Fishing on the web