I have a 1989 Bravo 1 outdrive Ser # OC686895, that is leaking gear lube our of the area where you have the connection that attaches the drive to the shift cable for forward and reverse.
I have not have much luck attaining a blow up of the upper gear case to see what seal is gone causing the lube to leak out.
I tried to call it up at Mercruiser Parts.com BAM marine. And I could not seem to find it ?
I just replace the engine couplers on both motors, along with new splines and u joints or crosses as they call them.

I have a feeling it is the seal on the back of the outdrive 26-127091 and 23-861209A1 where the shaft goes through the case, that has failed but I can't seem to find it in a parts blow up ?

Thank You in advance for the replies !
Brian

Leaking oil from the Shift Linkage area of the housing is the Shift Shaft Seal, it can easily be changed by removing the rear & upper caps on the drive.