I back flush the A/C unit with 100 below anti freeze until it runs out the inlet on the bottom of the boat. Then I test the anti freeze to see what the temp reading is. I have been using the purple 100 below for the last two years in everything including engines.

Thanks for all the input, much appreciated!
To those that store their boats in a heated garage, to what extent do you prepare your boats for the long winter months??

When I did store warm( before the price went out of sight ) I always drained the water system and put a light dose of anti freeze through it. Drained the blocks, ran antifreeze through just to lubricate. Backed flushed the A/C just to be safe. always changed oil before storing.

sorry to jump in, but since we are on the winterize topic, why start a new thread. After you guys run anti freeze through the motors, do you drain the blocks? My first year I did, second year I didn't. Both years no damage, yet am I ok to leave just anti freeze in the blocks without draining? Thanks

I have always left the anti freeze in, I have done this with my past boat for 8 winters and this boat for 6 winters with no issues, I figured leaving it in would prevent rusting internaly

Thanks for all the input guys!!

Thanks, and sorry for the Hijack verbi!

No, no need for appologies!! It is all related and good info!!

It's way too early for winterizing!! I prefer to ignore the fact the calendar is creeping towards the cooler WTX

I hear ya!
I wish I could go south for the winter!!