I have a 2012 250 Pro XS serial #1B917625 that has had issues of being difficult to shift out of gear after a long run. I checked the LU lube and it was black although it had been changed 2-3 months ago. I changed the LU lube (Merc High Performance 90w) and after a few trips to the lake it's doing the same thing. I check the LU lube and it's very dark again. There's no glitter or milky look from water present. Running a Trophy 25P on my BassCat Cougar if that makes a difference. Any ideas before I have to take it in to be worked on again? I've had repeated issues with seals on this LU. Thanks for any advice you can share.