Greetings. Our 1975 E27 is on the hard to have some much needed maintenance done. We just purchased her in May 2020 and there were a few things we knew we'd need to do; replacing the engine was not one of them. Our mechanic (very trusted Marine company) just called and said they no longer make a shaft coupling for this engine along with a lot of other parts. (2000 Volvo MB10A 15hp gasoline engine). To me it sounds like at the end of things we may be rebuilding this engine piece by piece, gasket by gasket from here to eternity. Can anyone suggest some alternatives? We would love to go with a small diesel like a Yanmar or something but would also go with another gasoline engine if there is a decent one out there. We are relatively new to boating and so I don't really know where to start looking. Can anyone give advice? I thought BOAT was "Break Out Another Thousand".... not "Break Out Another Tenthousand!" lol crying through the pain does seem to help. Thank you in advance!!