Hi- I have had many boats and have two others now a larger Carver Aft Cabin that has a system that heats so I don't have to winterize it at all here and my ski boat an older (1st year actually) Tige with an indmar 351 carbureted so it's simple on the ski boat fog, pull hoses and pet cock plugs on exhaust manifolds, drain, change oil, pull batt, but I think the Formula with 6.2's and the other systems (AC/Generator)is going to be a bit more involved and any help or a simple outline procedure would be great, I have seen a few but very complicated. I am on lake Texoma and it rarely gets to the point here where damage can be done but it does, I have drained the block (removed the two blue plastic plugs on each motor) opened the strainers and added antifreeze and ran the AC and Gen for 20 secs, added a gallon of antifreeze to the fresh water tank and run it through, pumped out the holding tank and poured a couple of gallons of anti freeze in the vacu flush head and sink, what else? I drained the hot water heater nothing came out? is one of the strainers for the AC and one for the gen? Sorry new boat for me bought from a lady who didn't know much/ no help boat has 106 hours and is on a lift. I will have the outdrives pulled in spring before I use it to have them serviced, she tells me they have never done anything to the outdrives to service them or for winterization- wow almost 10 years only 106 hours looks new runs out very well but I want to do it right but not over kill... thanks in advance for any help!