Anti Freeze for Merc Closed cooling
 

Can someone help me locate the thread that was on here regarding anti freeze for merc closed cooling system like on the 496. I tried on the general and tech sections. Someone was asking for source for it other than merc.

I need some.

Thanks,
Rick

I use a standard automotive mixed at 50/50.

Thanks Cuda but I was looking for the same color as what was in there. It is kind of redish/orange color. Anyone know what brand that might be?

Rick

I don't know the name of it but it is the antifreeze that the newer vehicles use (GM trucks). There is not a brand name but it is a certain "type" of antifreeze. I have it home and I will look tonight for you. ET

Thanks, I will look at GM. Keep me posted on what you findout.

Rick

The new GM trucks use what they call, Dexcool (I think). They do say, that any Silicate free anti-freeze works. I don't know if that's what they use in the 496's or not. But, I think the coolant in my Tahoe is that orangeish color, so it could be the same.

I would expect (hope?) that ANY anti-freeze used in a boat is a non-toxic antifreeze. (Not to be confused with "low" tox antifreezes.) If there is any kind of leak into the bilge or between the raw water and closed cooling systems, the last thing you want going into the lake/ocean/river is regular automotive antifreeze. Very nasty stuff.

Here's a few links:

Peak RV/Marine antifreeze
Douglas antifreeze

From Mercury's Service Bulletin:
Manufacturers USA and Canada: Contact these companies direct

Monson Chemicals, Inc.
154 Pioneer Dr.
Leominster, MA 01453
Phone: (508) 534-1425
Product: Freeze Proof Engine Antifreeze

The Noble Company
614 Monroe St.
Grand Haven, MI 49417
Phone: (616) 842-7844
Product: Marine Antifreeze

Rule Industries, Inc.
70 Blanchard Rd.
Burlington, MA 01803
Phone: (617) 272-7400
Product: Winter gard

Sorry to say, non toxic is propylene glycol and is not suitable for use as a coolant. It is fine for winterizing. Good old ethylene glycol is what is needed. Silicate free is the key.