High Quality Water Cooled Boat Motor 400HP Nta855-M400 Turbocharged 4 Strokes 6 Cylinders Marine Diesel Engine

The accessories of the turbocharged diesel engine are fully installed, and the air cooler, fresh water heat exchanger, etc. are installed on the diesel engine to facilitate the layout of the engine compartment. The diesel engine cooling system adopts an internal and external dual circulation water cooling method. The internal circulation uses fresh water to cool the diesel engine, while the external circulation uses seawater to cool the fresh water through a sea fresh water heat exchanger, improving the service life of the diesel engine.

A turbocharged diesel engine directly drives the propeller, and in order to achieve high propulsion efficiency, a lower rotational speed is required. Medium and high-speed diesel engines drive propellers through gear reducers, which are generally equipped with reverse mechanisms to achieve propeller reversal. However, low-speed diesel engines and some medium speed diesel engines can reverse themselves. Medium and high-speed diesel engines also achieve electric transmission through generators, motors, and propellers. When high power is required, multiple engines can also be used in parallel. When sailing at low speeds, only one main engine can work, thereby improving operational efficiency and reliability. When installing two main engines on the same ship, they are divided into left engine and right engine based on the installation position and propeller rotation.