LP Series 191â233kW (260â315HP) In-cylinder Yanmar diesels, including sterndrive models. Overhead camshaft design develops maximum power at lower engine speeds, allowing smaller, smoother-running propellers. The water-cooled turbo with wastegate really makes things happen when the throttle lever is pushed forward hard. LP Series 6LPAM-STP (315HP/232kW) Four valves for each of the six cylinders on this high performing diesel engine. Turbocharged, aftercooled and direct injection. Supplied as bob-tail unit so that you can choose your transmission type.Specification: