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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #1  
Old 11-18-2005
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Winterizing

Is there any reason why I couldn''t use windshield washer fluid to winterize the raw water side of my fresh water cooled Yanmar? It is a lot cheaper, and protects to very low temperatures. I''m in Virginia, where winter temperatures are normally moderate.
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Old 11-18-2005
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Winterizing

Windsheild washer fluid, although cheaper than non-toxic engine antifreeze and having anti-freeze characteristics, will not protect the iron components of the raw water section of your engine from corrosion.
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Old 11-19-2005
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Winterizing

This is my first year owning a diesel, so I used the good stuff to winterize my engine, but a lot of people use RV antifreeze. Is it any better than windshield washer fluid, or does it have the same deficiency?
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Old 11-19-2005
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Winterizing

Good question . . . I would suspect RV/Marine antifreeze to have a lower freeze point than washer fluid and is non-toxic, since it''s developed for use in pressurized onboard water systems . . . not that that matters any with a boat engine. However, all boaters should ensure that whatever is added to fill the engine block over the winter, is non-toxic. Good for the environment & safe for the critters & pets that may consume it.

Aside from that, there dosen''t appear to be any other advantages over washer fluid.

I only use marine engine, non-toxic stuff in my diesel''s raw water section, since it possesses anti-corrosion ingredients. The cost is only a couple dollars more per gallon . . . substitutes are false economy. Using anything else misses the point of adding anything at all. Just completely drain all the sea water if you''re that cheap.

Steve
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Old 11-24-2005
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Winterizing

Besides the other reasons mentioned (corrosion protection, et al), I wouldn''t use windshield washer fluid for another reason. Washer fluid typically contains methanol as its anti-freeze, and methanol deteriorates rubber. I see the potential for problems in hoses, impellers, etc.

FWIW,
Mark
Lake St. Clair, MI
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