Bearing carrier leak

[BOWTECH.JUSTICE]

2002 50hp TLDI. I had a little leak of gear oil coming out of the bearing carrier. Put in a new o-ring and now I see it is still sleeping out. Is there a simple fix to make a better seal around that o-ring?
Thanks

 

[pvanv]

After nearly 20 years, I would reseal the whole LU with a new kit. The prop shaft seal may be weeping. There is only the one o-ring that seals the prop shaft housing to the LU, so if that's new and everything is clean, that's not it.