Before purchasing a boat out west I am having the motor started using the muffs, to make sure it runs. This motor, a 496, in a 2006 boat, has been winterized. I know it also has a 1/2 closed cooling system but the exhaust and risers are raw water cooled. Because of having the motor started it will no longer be winterized. This boat should be transported to Florida in the next week. Will I be risking damaging the motor during that travel period of time because of any residual water still in the exhaust and risers if my shipper experiences any below freezing weather? I am sure there are some valves that could be opened to drain off this residual water but I can't be sure that will take place.