10-25-2018, 12:21 PM
I don't have an I/O but I do face a lot of those questions with irrigation pumps and such around the farm that needs to be drained to avoid block breakage... What I've found over the years is you're usually okay to about 27 degrees F over night... Then there is a fuzzy zone of maybe and maybe not and by the time you get to 23 and down then you are definitely at risk of freezing and problems, then you need look at maybe putting an old electric blanket over it and plugging it in or putting some RV antifreeze into it... and it's all going to depend on cold duration and wind chill and water section thickness and engine retained heat... But the nights are long this time of year and the engine heat won't last through the night till morning if it gets very cold... Those low 20's is my cutoff to where I expect problems.... Too bad you can't figure out how to put compressed air to it to blow it out... Might make them usable all winter... Good luck and I hope it will work for you... Later J
[signature]
[signature]