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barmcd · 03-20-2016, 04:03 PM

It's an Onan 7500 quiet diesel generator. The owners manual specifies type of antifreeze, but not how much.

Thanks

BFlinn181 · 03-20-2016, 04:39 PM

Onan has changed their website, now owner's and service manuals are tough to find. I found one place that said the coolant capacity is 4 quarts. If you bought 2 gallons of 50/50 mix, I'd think you'd have enough to fill the system and use the extra to top it off.

barmcd · 03-20-2016, 05:22 PM

Quote:

Originally Posted by BFlinn181

Onan has changed their website, now owner's and service manuals are tough to find. I found one place that said the coolant capacity is 4 quarts. If you bought 2 gallons of 50/50 mix, I'd think you'd have enough to fill the system and use the extra to top it off.

Thanks Bob. I was thinking of using the extended change interval antifreeze like I use in the Cummins in my Dodge. The generator is in a 2000 Monaco and the change interval is currently 24 months. I'd like to extend it to 60 months, is there any problems with that?