I recently hit a sand bar due to low lake levels and drought. I ruined 3 out of 4 blades on my prop. I trimmed up as soon as I heard it hit. Changed to back up prop and ran the rest of day with no problems. I just got a new prop and was going to put it on when I noticed a little oil on the skeg. It was not enough to leak on ground, however, I could tell it was coming from behind the prop. Should this be enough to warrant a trip to dealer? Does this indicate a bad seal? I checked the lower unit oil and it was not contaminated and was full. I am not a mechanic and would appreciate any suggestions or help. Thanks I have a 2002 190 LS Stingray with a 4.3 L, volvo penta sx I/O. Thanks