Winterizing HP525's
 

I have HP525's with Bravo XR drives with dual raw water pickups.. Factory installed fresh water flush T'd into the raw water hose from the outdrive. I saw this quote on another thread in Q&A. Is this the correct way to run antifreeze into the raw water system? Should you still drain the manifold risers first?

"I have a tee that I screw into the garden hose adapter for winterizing. 1 end water supply, other end to 5 gallon bucket full of antifreeze. Run the motors until up to temp, shut the supply leg off, open the antifreeze. Instantantly sucks the antifreeze down."