I had a guy at Cabelas tell me not to winterize as it was mostly just a way for shops to make money. I've also had folks tel me to make sure to winterize. One year, I drained the oils aand fogged the cylinders myself on my Merc 60. That was no problem. To have it done "professionally" on my 200HP & 9.9 Yamaha is pricey. SO.... YES OR NO? I have 80 gallons on non-eth fuel in the tank so that should limit to moisture to a degree. Your thoughts?