I'm getting ready to winterize my '78 16' Starcraft SS and outboard ('95 60 HP Johnson) for the first time and I think I have everything I need to do it properly but I have a question about residual water left in the motor. I live in a cold climate and my boat will be stored in an unheated garage for the winter. Do I have to worry about any residual water left in the motor somewhere freezing and causing damage?