i would say nothing hurt at this point. the main problem with water is if there is enough in there it will freeze and expand and crack the housing. we haven't had any real low temps at this point. and if there was just water at the hole that came out it probably wasn't enough to expand enough to crack the housing. did your drain screw have a seal on it? i would probably have the prop shaft seal replaced and use new seals on both the upper and lower screws. i would do this early next spring before the season starts.