I have the Volvo
Penta MD17C in my 1976
Morgan 46'. It moved my boat fine for the first two years of my ownership(6.7 kts @ 2200 rpm) until it suddenly siezed a cylinder when an injector quit working. I'm DONE chasing my tail to find parts

and am in the process of building a custom 3.5:1
gear to retro fit a Toyota 22R inline four gas
motor, Parts cost a fraction of the
price and I can get them anywhere in the world, not to mention the HP boost from 36 hp WOT to 97 hp WOT! I am going to install a brand new
motor for under $3500 total out of pocket!
If anyone needs Md17C parts, I have them, PM me to let me know what you need.