Re: Installing Lower Unit Myself
referring to the diagram from the link posted here, "http://www.crowleymarine.com/brp_parts/diagrams/38555.cfm"
You will first need to screw in the 4 bolts, (2 port 2 starboard), identified as #72. Then there will be 1 large bolt, #70, just forward of the trim tab. Another bolt, #80, beneath the trim tab, with the trim tab getting installed on top of that, #60 and #65. If the trim tab was not marked, you may need to adjust this. The shift rod also needs to get installed, #57.
Before doing this, you may want to change the water pump, grease the splines of the drive shaft, flush the cooling system, and clean out the water intake.