How cold before need to winterize?

[nipper]

Thanks, Spare. Did that, and the lowest plug on the starboard side was plugged pretty good. A LOT of water gushed out after I stuck a wire up in there. Did it again after it had all seemed to be drained and it was clear.

I have heard that some folks just pull the plugs on their I/O's, let the water drain, and just leave the plugs out all winter. I would not be comfortable with that unless the boat was stored indoors and there was no chance at all of having a tarp problem and getting the bilge filled up with water.