I was doing my routine maintenance on my motor today and noticed that the drain screw on my lower unit had some oil residue around the screw it has not been dripping it is parked on pavement. I drained all oil it was a little milky. Once it drained all out I pumped in fresh oil from the top hole to flush anymore water out an when I shined a flash light on it I could see small Metal flakes like glitter in oil. I am replacing all drain screws what else should I do to make sure my lower unit don’t go out on me.