There are obvious differences between Marine main engine and auxiliary engine in function, size, weight and installation position.

First of all, the function of the Marine main engine is mainly to provide the main driving force for the ship to push the ship forward. It is the most important power equipment of the ship, by driving the propeller rotation of the stern, as the propulsion power of the ship. Marine auxilaries provide power supply for various auxiliary functions of the ship, such as sea pumps, compressors, generators and so on.

Secondly, the Marine main engine is usually relatively large, the diameter can reach several meters, and the height can also reach more than ten meters. It is also very heavy and needs to support the operation of the entire hull. In contrast, Marine auxilaries are much smaller in volume and relatively light in weight, mainly used for the operation of various auxiliary equipment on board.

In addition, the installation position of the Marine main engine is usually in the center of the ship to ensure a stable output of the driving force. Marine auxiliary machines can be set up in each workshop.

Main engines consume more fuel than auxiliary engines because of their greater power output. Ships often have multiple auxiliary engines as backup in case of engine failure, while they may only have one or two main engines because they are more reliable and less likely to fail.

In general, the differences between Marine main engine and auxiliary engine in function, size, weight and installation position are to ensure the safe and stable operation of the ship.

Besqo Marine offers various brands of auxiliaries and spare parts. For more information, please email to sales@besqo.com