I just changed the oil in my lower unit for the winter. I noticed that it was not an oil color, but a lighter color almost the color of peanut butter. Does this mean that I have a seal that is leaking? Do I need to worry if I change it before I put it away for the winter each year?<br /><br />If I have seal that is leaking can I change it myself? I have the shop manual for the motor, but how difficult is it to change the seals? How long would it take? Do I need any special tools?<br /><br />Thanks and have a great day.