Just did a complete once over on the '98 6hp I bought. Previous owner used it on his fishing boat so I wasn't to surprised when I took off the prop and found fishing line wrapped on the prop shaft.
I'm not sure how long its been since he changed the lower unit oil, but of course some water came out followed by milky oil. I sprayed a bunch of WD-40 in before refilling with some Volvo Penta synthetic lube that I use on the big boat.
What seals will I need to replace if this is an on going issue? I plan to drain the lube in a month or so to see how it looks.