I would like to winterize my motor myself this year but the manual I have is not real specific. It's an mercruiser alpha 1 with the single point drain (blue hoses). Anyone familiar with this and have advice on how to get started doing this on my own.

Do a search. This topic has been discussed at length many times.

can't seem to find anything relating to my particular motor. May not be entering the right combination of key words in my search. Anyway, how about a web site where I can maybe purchase a shop manual for my specific needs?