Practical Sailor has done a couple reviews regarding antifreezes. Some things I was unaware of, are that the -50° antifreezes can still get slushy at ~0°. The freeze/thaw cycles can stratafy the coolant and then leave you with pockets of water that can freeze. Also the -50° antifreeze may have ethanol and likely has only about 30% glycol. These -50° antifreezes can grow microbes so using them in the fresh water tanks has bad results. After all of this you should also factor in the fact that the antifreeze is guaranteed to be diluted by the stagnant fresh water already in the system. My personal take away from the articles was: Use the -100° glycols and check them for no ethanol.
I have found that a shop-vac can do a pretty good job of blowing the lines almost completely free of water. If you're still worried about loops or pools of water then you can still do all of the regular adding antifreeze and opening petcocks drains. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Nov 4, 2014 9:31 AM, "Bernard Toews via CnC-List" <[email protected]> wrote: > > I'm new to cnc. I should mention that I have never owned anything bigger > than a two man dinghy until I bought a 1979 34 C&C ( Hull No. 175) so I'm > in the unfortunate position of knowing very little about my boat and so I > have lots of questions and only a few answers. Websites, books and forums > are very important to me. I would classify myself as an inexperienced boat > owner although I am some experience sailing a keel boat. > > I am trying to learn to maintain the boat myself and I'm finding that the > learning curve is very steep. I am trying to get to know my boat and make > sure I do things right. > > > I am winterizing the boat myself for the first time. I live in an area > with a harsh winter climate (Winnipeg, Manitoba) where the temperature can > drop to 40 below Celcius in the winter (not counting wind chill factors). > The boat has a raw water cooled 30 hp Atomic 4 engine. I want to make sure > that I am doing everything correctly when winterizing my boat. I have > pumped RV 50 below anti-freeze into the engine until the anti-freeze ran > out of the exhaust. I didn't warm up the engine at the time since the boat > was on the hard and I had no water source. So, in order to be safe, I will > be taking out the thermostat and running anti-freeze through the engine > again. I will then open and leave open the three drain plugs or cocks ( > cylinder block drain cock located on the port side, drain plug located on > the port side near the water pump, and the manifold drain plug). I have > been told to drain the muffler in full for the winter but I don't know what > that means or how to drain the muffler or even where it is located. Also, I > have been told to loosen the water pump cover and drain it. I'm not sure > how to do this. I would welcome responses and comments about these matters > and also if there is anything else I should be doing to winterize the > engine or other parts of the boat. > > I welcome any suggestions about sea cocks as to where they are located and > which sea cocks should be open over the winter and which should be closed > during the winter. > > > I apologize for this lengthy message and will try to be brief in the > future. > > > Beyent > > > _______________________________________________ > This List is provided by the C&C Photo Album > > Email address: > [email protected] > To change your list preferences, including unsubscribing -- go bottom of > page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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