- Dec 29, 2017
I have the standard engine on the Cat 310 and was wondering how much antifreeze others use for winterizing? The person that I bought the boat from gave me a rule of thumb guide, “have someone watch the exhaust area, when the pink starts coming out put another half gallon through and you are fine”, which has tended to be between about a gallon to a gallon and a half. Only reason that I ask is that my slip neighbor, who has a Hunter with a 50hp engine, uses over 5 gallons to winterize. I was surprised that he was using 5X the amount even though his engine was only 2x the size. Any thoughts and commentary from the community are greatly appreciated.