While waiting on the storm to get here and leave, I decided to do something constructive toward fishing.  As one of my men once wisely said ” Grease is a whole lot cheaper than iron”. Changing the oil in your lower unit is one of the things you can do when you can’t do anything else. I ruined the top plug gasket doing mine and, when I went to get a new one, the “expert” I got it from told me some things about the process that may be good to know . When I changed mine last I just put in one tube of oil. Some bubbles and a little oil came out the top hole so I figured that was enough. When I drained my oil this time some looked a little milky which I thought might be water.  It was , I was told, air bubbles because the case was not completely full. Since I had just put in one tube of oil, I hightailed it out and got one more to completely fill the case. Another thing, any water that gets in will separate from the oil and be the first thing out when you take out the bottom plug. A few drops is nothing to get upset about. Indeed a few drops came out of mine but I thought they had come from someplace else. While I was lubricating I greased my trailer axles too.