Coolant

[Ken Osborne]

I have a 1995 29.5 Hunter with a 2GM20F diesel. I have heard rumors that Yanmar suggests changing the green colored coolant for another type of antifreeze. I'm wondering if this is recomended for my engine and why? If so, should I change the thermosat too? Since it's five years old now, I was thinking of doing this in the fall anyway. Thanks in advance for any info. Ken

 

[Ike Stephenson- Torresen Marine]

Coolant Info

Here's some coolant/anti freeze info:1. Yanmar reccomends changing coolant solution every 500 hours, or once year whichever is first.2. A couple of coolant/anti freezes that are approved are: Texaco Long Life Coolant Anti Freeze Product Codes 7997 & 7998. Havoline Extended Life Anti Freeze/Coolant Product Code Product Code 7994. You should drain and flush the cooling system before adding either of these products.The color issue may have to do with winterizing. We use a pink colored RV anti freeze when we winterize boats in Michigan. The chemical formualation is much less harmless, better for the water when you start up in the spring.