"Tony, I'm remembering 4 s
"Tony, I'm remembering 4 screws but may only be 3.
So with the prop off, and the screws removed, you put the thrust hub back on and press it in so that the (ears) on it mate up with the bearing carrier (kinda locking them together) - you can put the propeller back on to keep everything pressed into place. I then use a a socket on the splined nut to turn the who thing clockwise (the threads are left handed) to wind the bearing carrier out of the lower case.
Of course that is assuming that it has not "welded" itself into the case as is quite common on older units that have not been previously taken apart.
The reverse gear and the clutch will come out with the bearing carrier along with the prop shaft.
It's not rocket science, but you should really at least have a Seloc's manual if you are going to tear into the gearcase..."