[oldbluesplayer]

Do a google search on the following: winterizing an inboard outboard drive -

this will result in numerous good hits giving you the info you seek - I just ran this and found one specific to the mercruiser - scanned several others - all seemed accurate.

My two previous boats were I/O's, and I've always done my own - just remember that you have a car motor hooked to an outboard, essentially - the major difference will be whether you have closed circuit or raw water cooling for the motor.

Good luck!

Bill