Quote Originally Posted by Mxmark4 View Post
Thank you! Good to know where yhe ballast pumps are gonna get them winterized too, water meter key worked like a charm to loosen the center drain plug.
Not much to winterize on the ballast pumps.

I ran mine until nothing came out. Pulled the rear bags and dumped what I could then left them out of the boat.
Once you change ballast impellers there is nothing to freeze. The center tanks holds 500# of water in your Mondo. That is a lot of room for expansion if you have it drained. I cranked my trailer nose high and ran the center/front ballast pump until nothing came out. Just check your bow bag if you are not pulling it, to make sure it is actually empty. I disconnect mine so the fittings don't crack, but I didn't remove it. No need for anti-freeze in these boats with closed loop cooling.