I am interested in a 50 ft trawler with a Scania DSI11 R82A engine, also known as a Waukesha Scania F673D series engine. The engine is original to the boat (1976). 11 liters (673 c.i.), turbocharged, intercooled, derated to 200 hp, with 3900 hours. My brief research shows these engines to be...