I never bothered with pumping antifreeze into the AC unit. Too much work. I simply blow all the water out with my automotive tire pump. It has several tips for various uses such as this and one fits perfectly into the through hull fitting next to the unit. Just back blow the water out through the water pick up in the bilge. Make sure you open it first.

Done this for the last ten years and two boats with no issues. Should be all you need to do since you store in a heated garage.

Good idea on blowing out the a/c unit!
The garage (airplane hanger) is heated to a point where you can work with a t-shirt on.
Thanks for all the good idea guys!

Also a great way to flush the AC for those who boat in the salt. Just hold the hose up to the through hull next to the unit, open the sea cock in the bilge and let her rip. Way easier than tring to hook up a 'fake a lake'. OMG!

I do the same thing but use a jabsco pump to pump the pink through it versus air. Takes less than a gallon of pink and about 10-15 seconds. That and the generator take the least amount of time to do.

Great idea! I have one of those, but mine always has oil residue in it. Verbie, you want mine? Makes oil changes a breeze. Jabsco 5 gallon kit.

I'm going back to clip ons.

That's why I bought two jabsco pump kits, one for oil and one for pink. For the gen I just disconnect the hose from the output of the strainer and pump the pink down it to the gen, turn the gen on for 20-30 seconds and done.

Uh huh...you still deal with all that?

Retired - I have nothing else to worry about these days.

Thanks for the offer but I don't need one for this unit.
I have the little oil hose that is attached to the oil pan drain plug, I pull the hose through the hull drain plug, straight into a 5 gallon pail, and go have a beer.