I have a new 90ETEC...have about 15hours on it. Bought it late this summer...I plan on going out duck hunting a few times this winter with it...it will be setting for about a week at a time outside in an unheated building...how should I care for this outboard and what should I do for keeping life of the engine...What if it is going to set for two weeks or so in a building that is 20-30 degrees...Thanks for help and insight...