Well as I can’t remove this now, for some content, I wonder what this early RBM gear case ended up being used for? Its on eBay as “Vintage 1920s Brass Outboard Motor Lower Unit Johnson”. Don’t know what it came from but it wasn’t a Johnson. Only 2 screws so I suspect its early
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.