Hi All, I've got a newbie question for you. It's going to hit 28 degrees in the Lake Norman region this weekend on Friday and Saturday night. My boat is on a lift in a community slip, the water is still pretty warm. Unfortunately, the guy that's coming to winterize it won't be here until next week. I'm going to attach a magnetic engine block heater to the engine. Do I need to worry about this quick cold snap? Or do you think I'll be OK?