[C320-list] What antifreeze/coolant?

[swampcreek42]

I finally found the Yanmar Ultra Life YG30 coolant locally. After 7 flushes I had clear water coming out of the engine. I replaced all the hoses and the thermostat, I let everything sit a day just to be sure the very thin layer of gasket dressing I applied had more than enough time to cure. Today after work the Yanmar YG30 goes in! 
Bruce Hunter Nauti Time #719 


Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Rod Boer <rod.boer1 at verizon.net> 
Date: 07/30/2015  4:45 PM  (GMT-05:00) 
To: C320-List at Catalina320.com 
Subject: Re: [C320-list] What antifreeze/coolant? 

Bruce,

My boat is around the same age as yours #688. I did quite a bit of research on the coolant a lot of years ago and determined that Prestone Prediluted Extended Life Antifreeze Coolant should work in my engine.  I can't tell you the first year that I changed it but it is safe to say it has been at least 7 or 8 years and there haven't been any issues. I also stayed away from the DEX COOl because of the controversies at that time. I don't always put too much stock in the information that Yanmar provides.  They are the ones that originally said to put the engine in reverse when sailing and now say put it in neutral since reverse might damage the transmission and they also said when measuring the fluid in the transmission make sure the dip stick is screwed all the way down and now they say just set the dipstick on top.

Rod 

-----Original Message-----
From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of swampcreek42
Sent: Saturday, July 18, 2015 6:30 PM
To: C320-List at Catalina320.com
Subject: [C320-list] What antifreeze/coolant?


    

Ok, I've read myself into a stupor. This is good followed by NO! NOT THAT! This shouldn't be an odessy! IT'S ENGINE COOLANT!Anyway I have a 3GM30F a 1999 engine in a 2000 boat (boat built in November 1999). It now has the green stuff, I was happy with it but read it might be a good idea to go to the extended life coolant  (ELC). Since I'm changing out the engine hoses and the thermostat which I believe to be original now 15 years old I think I'll flush the heck out of the engine and change to the red or orange stuff BUT all the information I'm seeing is at least 5 years old and is very contradictory. The local shop states DEX COOL but I've read there were problems and lawsuits over that stuff. Then Havoline ELC is recomend but I also read they make DEX COOL! This is nuts! I'm almost resolved to staying with the green stuff, but read with the green stuff you might need to add supplimental coolant additives which Yanmar doesn't recomend. I do see that Yanmar makes Yanmar Ultra Life YG30 but can't seem to see it advertised locally. Sooooo, what are you all runnimg?
Bruce Hunter Nauti Time #719 Pasadena MD 

Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Scott Thompson <surprise at thompson87.com> 
Date: 07/18/2015  12:45 PM  (GMT-05:00) 
To: C320-List at Catalina320.com 
Subject: Re: [C320-list] Wing vs Fin