I have a 30ft Boston Whaler with 2 2002 225 Optimax outboards. It is moored just north of Seattle. The boat will remain in the water over the winter and will be exposed to occasional freezing temperatures. I typically keep the boat with the engines raised out of the saltwater. My concern is that the engines don't drain when they are raised. So...how do I handle this situation? Is there a way to blow or drain the water out while in a raised position? Or, is it better to drop the motors into the water?