Yanmar 4jh 30hp at 1500 rpm 38.5 at 1800 rpm four cylinder diesel engine. Engine came from a 20kw gen set from a yacht with 435 hours on it. Removed the generator and had a machine shop make the drive plate on the flywheel. It has a 1 1/4 inch keyed output shaft that can be connected to just about anything you want. Turbo charged and after cooled, heat exchanger cooling Runs great. The fuel injection pump has been overhauled and the starter is new