@Ricardo: The first guy who sold me an inboard (1983 Ski Supreme, Pleasurecraft Marine/Ford 351 Windsor, carbureted), showed me how to change the oil, run Stabil through the fuel system, drain the block, tranny cooler and exhaust manifolds; then fog the engine. Twenty years later, the guys I was paying to winterize my inboard (1992 Mastercraft Prostar 190, Mastercraft Ford 351 Windsor, carbureted) put Stabil in the gas, changed the oil and filled the raw water cooling system with pink antifreeze, but never fogged the engine. Now I'm back on my own. Now I'm back to doing it myself for the first time in many moons with this Mercruiser. I know Stabil, draining the cooling system and oil change are mandatory. What about the rest? Fog or not? Antifreeze or not? Thanks for yr help.