e&a

hi i am a newbe here
my q' is :
i live in nj , the winter its preety cold .
if i Winterizing the jet ski and cover it , and leave in the back yard, can the cold harm it ? cause i see all the time in the classifides , pepole writeing "keeped in heated garage" or "garage kept" .
if so .... do u guys have any idea for me where and how to keep it in the winter, so nothing will go bad? i dont have a garage.
thanks