Winterizing Mercruiser 5.0

[Jayesq]

In the past I have used the WM winterizing kit and muffs. After reading many of the comments I have decided to abandon that method and feed antifreeze directly into the block. After I pull off the hose from the T housing that goes to the circulator pump I understand I can pour AF into the hose and it will get to the block. I just wanted to make sure that I don't need to do anything additional to get the AF pass the circulator pump while the engine is off. Thanks for any comments or suggestions.

 

[Chris1956]

Re: Winterizing Mercruiser 5.0

To fill the block we normally pour the A-F into the large hose from the waterpump to the thermostat husing. That bypasses the thermostat, and it will pour directly into the block thru the waterpump.

Don't forget to fill the manifolds and risers.

You might repost any further questions in the I/O forum.