I was looking at the Johnson common parts list and it says they are compatible.
This is the link for it in case you need it or future reference https://www.joeoutboard.com/resources/Manuals/Johnson/JohnsonCommonParts.pdf
Thanks M for posting that. I have a 1931 OA-55 that’s getting near the top of the list and it has some damaged and missing parts. Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.