Well, I'm in Florida so witerizing is not necessary. But, what I do during the "slow" season is put the battery on a trickle charger and crank it up every week to make sure it doesn't stagnate. The old addage, "if you let it sit you have more problems" that applies to boats is the same for skis. You have to keep the moving parts moving. I have even gone so far to hook a hose to the flush kit and run it for 5 minutes just to make sure it stays lubricated. Fogging oil is a good idea too. I have owned many skis, and followed this protocol year after year, and they are always ready to run at any given time without any issues. Granted, the temp rarely drops below freezing here (but it does), so you colder climate guys may have to do some additional things to keep the ski in top shape.