Quote Originally Posted by beast 496 View Post
We winterize over 300 boats a year, We always drain and then flush with a marine, non toxic antifreeze. We leave the blocks dry and plugs out. In the spring, we simply summerize, install the plugs, test run, and deliver. We have not had a frozen engine ever doing this process. Al
Just curious as to why you drain the anti-freeze. I know other people do it as well, but the marine stuff is good to -50*. From what I've read, the marine stuff will not expand. Just seems like a waste of anti-freeze if you're just going to drain it. I'm open to anything though!