That is the correct US spelling of the term "winterize" (make ready for colder weather).
The UK spelling is winterise.
winterize it only if you want it to work in the future
No.
The Willis Report - 2011 Winterize Your Car was released on: USA: 10 December 2013
2 bags of concrete
Follow the link for the steps.
you go to it and throw it away
Yes, it is recommended to winterize your sprinkler system before cold weather arrives to prevent damage from freezing temperatures.
winterize 2013 yamaha 4 stroke twin jet boat
http://www.ehow.com/how_2087098_winterize-jet-ski.html
At ASK.com revealed lots of possible answers.
Drain the water and put antifreeze in the pipes
My first instinct is to say "Your kidding me rite?". However, I'm curious, why do you fell you need to winterize your AC unit?. My second question is what type of AC unit do you have?