I've looked through the past threads and can't seem to find the answer to my question. I have a new (to me) inboard/outboard 4.3l mercruiser that I keep on a trailer, that I want to use for the winter fishery. What do I need to do to keep the motor from freezing while on the trailer? I know what to do if it were to live on the trailer until spring, but I want to use to use it through the winter. I hope I don't need to winterize after each use! I was thinking of getting an engine compartment heater, as the boat is under cover. Looking to you old pro's for any info.