If that is from an OMC and it’s bronze that was an optional housing that was for high wear conditions such as shallow water running in places with a sandy bottom. I bought a new old stock one years ago on eBay for a mid 50’s OMC big twin. Just to have it but not to use.
If that is from an OMC and it’s bronze that was an optional housing that was for high wear conditions such as shallow water running in places with a sandy bottom. I bought a new old stock one years ago on eBay for a mid 50’s OMC big twin. Just to have it but not to use.