I have been noticing a slight oil residue accumulating out of the secondary water pickup under the cavitation plate, as well as on the bolt direcltly below the base of the prop. I'm still in the break in process and running double oil. I'm wondering if this is excess 2 stroke oil that hasn't burt, or if it is lower unit oil that is leaking. Any tohatsu experts might be able to chime in since this is really a tohatsu with merc stickers. Pic 1 looking up under the cavitation plate. Notice the round secondary water pickup plate, it has the black ridges and single screw on the bottom of the cavitation plate. The residue is acccumulating here. Also notice the bolt directly under the base of the prop. There is a tiny slit in the lower unit by design. Oil residue is slowly coming from this space and accumulating at the bottom side of the bolt. Any help would be appreciated. I'm thinking it is not anything to worry about but I would rather get a definite answer before I go run it again.