Chilly Weather coming

[Baydawg]

I splashed my boat saturday and now they are calling for 20's at the end of the week. This being my first I/O, even though it is a closed loop system, I am worried about the impending cold. Should I be worried or take precautions to keep the motor from freezing?

[Heavy Action]

I fished Saturday and I pulled my plugs in my IO yesterday due to the 20's coming. It's easy, just one plug on the block and one on the exhaust manifold. With a closed loop system I'm not sure about that. Probably not?