How does one know all the water is out of a boat engine before the temperature drops below freezing? I have a 1960 Evinrude 40hp Lark. It is not running properly, as I can only keep going for no more than a minute by keeping the choke half way out. I had the engine in a garbage can full of water when I last ran it in September. I plan on taking it to a mechanic in early December, but am concerned that there may be water inside that could freeze and cause damage. I have the engine on a boat and it is in the down position, which the mechanic told me to do. Is this enough to be sure there will be no water in the engine? Thank You!