The enclosed photo is the shaft on an Ocean Alexander 70 from 1983. Does anyone know what this thing is? Could this be a 2 piece shaft coupling where the 2 half’s of the shaft are threaded and actually screw together. That was one guess. Any other ideas? It even has stumped the yard manager here in San Diego.3594E35C-FE0E-45E0-B42F-C667E9FAEC0E.jpg