Uh oh...worried about winterizing

[Glasplyer]

Pulled my 1975 glasply 21 fter 302 mercruiser i/o out of salt water last weekend. Have been working on winterizing. Ran some salt-a-way with muffs couple of days ago. Has a closed loop fresh water system. Pulled the plug on the bottom part of the heat exchanger and tubes to/fro the H/E...did not get a drop of raw water. Should i have? Certainly want to drain raw water. Read a post that the risers have a plug...i see a large allen wrench type of plug on the side...would i find raw water there? I'm reluctant to pop that plug...have to head into town and get a much larger allen wrench...and if it isn't what it looks to be. Help!

 

[Haut Medoc]

Re: Uh oh...worried about winterizing

I have the exact set-up as you......
Pull the hose that enters the H/E at bottom starboard side, (the one that comes from the transom).......
Since you have that plug out, note that it should have a 'pencil' looking sacrificial anode, if it does not, get one, they screw into that plug & should be replaced yearly......
Make sure no water sits in the hose that 'T's' to the risers.....
My riser plugs are 1/2" square, so they are easy to remove......
Be sure to check the freezing temp of your closed side, if you are running 50/50 like you are supposed to, you will be fine......