Here's a partial answer..
Hey Mike, I went to the sailboat show out here in Jack London Square last month and spoke with a local rep that deals with new/replacement diesel engines. It'll cost around $5,000 for the new engine. Sorry I can't remember exactly which model or company, but I have that info at the boat. I was told that the new engine fits perfectly where the Petter sits, bolt-for-bolt.I too have a Petter diesel and it works well on my '77 Cat 27. Except for the fact that I would love to get more speed out of it (hate being the last one out of the marina) it's fine and reliable. All I know is there isn't many boats out there with Petters anymore.. I'll have more info when I get back to the boat.