No oil changes? Pull the dip and smell the oil at the end of the season and you'll easily notice the presence of contaminants..not a wives tale. Sure doesn't matter if you only have the boat for a few years but if you plan on keeping it long term, better to change it at the end of the season...
I agree with you, all I do is engine oil (don't want contaminants eating seals over the winter), gear oil (in case it's contaminated with water and always a good idea to have fresh lubrication), then winterize block and that's it for off season layup.
Absolutely these are all important items, but in all my 40 years of boating, this is not an annual maintenance routine. These items are tied to usage and time, so how many hours and or how old are the components since they were last inspected/changed? Also, there are signs before some of these...
I winterized an 06 4.3 L Mercruiser by removing the 5 drain plugs, draining and then filling backup via the water pump hose with antifreeze. My question is whether or not the power steering cooler is winterized now aswell?
Thanks