where do i get vintage sears outboard parts?

[lathehand]

You might try these guys http://www.aomci.org/ if somebody don't have what your looking for they might know someone who does.They to are a great bunch of guys .Also they have a free classifides section where anyone can shop

[phatdaddy]

find out who made the ob for sears, they usually re- branded from another maker.

[THEFERMANATOR]

From what I could find it is an ESKA outboard rebadged and sold by SEARS. The engine is an air cooled TECUMSEH, but no idea whos lower unit. Sounds like your going to need to disassemble yours and take the pieces to a bearing and seal place and have them match them up for you.