the stuffing box is lubed-sealed with either water, flax, some type of new fancy-schmanchy (technical term) no stick-um packing that keeps it turning and the dry in, and the wet out. . There really should be no water ingress into the boat. period.
Some bronze bushing so do have a carbon/petroleum based lube imbedded in the bushing itself, but, this is not a sealing device, its a lube.
The cutlass bearing is a whole 'nother breed o'cat.
heres a really good link....
We are not primarily on earth to see through one another, but to see one another through
Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs