Changed the lower unit oil at 52 hrs and had a little suprise. When I took the lower screw off a little water came out. Then when I took the top screw out what looked like normal oil came out. It was not very milky and felt and looked fine. When I took the prop off I found about 3 feet of fishing line around the base of the prop but the prop seal look good to me. I just had the upper seal changed about 100 hrs ago so I'm assuming it isn't that one leaking again. The line wasn't tightly wrapped and pulled right out. Anyway I changed the oil and now was wondering if that prop seal is leaking how much damage I will do running it? Can I just change the lower unit oil more frequently, say 25 hours. I want to be able to use the boat untill the end of the fishing season around Nov before I take it in to get it checked out. Thanks for any input.