One of the first engines I had worked on as a kid, alongside my old man. We had two of these in an ex-military pacific landing craft. These were AWESOME engines compared to the tame Gardner 6LXC(?) engines that we had previously worked with.
Two Stroke Detroit Diesel's. Twin turbo. Noisey, smelly, thirsty bastards.
This one is running without it's turbos, naturally aspirated.
http://www.youtube.com/v/DSXKCG53zaA