2007 ZX190 winter usage?

[glasscat]

I bought this boat four years ago. I store it in an unheated barn, here in northwest Missouri. The first winter I found ice formed in the bilge discharge fittings on the transom. When the weather warmed and it melted, I shoved a flexible tube down the fittings and blew out with air. This year the cold arrived before doing this. Is this a hose routing problem or check valves at bilge pumps? Either way, not safe to use during cold spells till corrected.

[SteezMacQueen]

My TZX190 does the same thing. It might be normal, but, yeh if they are frozen up I don’t see how it would work. Maybe the warmer water from the lake would clear out the frozen, but I wouldn’t chance it.