Motor is a 2005 Yamaha HPDI 200. Very low hours. Used it only 4 times this season for MAYBE a total of 5 hours. I fish more electric only lakes and the motor is tilted up when I'm in the water.
I drained the gear case for the winter change and noticed these swirls in it, (the big white areas are shadows from the sky above). The motor was cold and had not been in the water for 3 weeks. This is the first time I am changing my own gear oil. Anything to be concerned about? It looks like it could be traces of water?