There are many brands of marine diesel engines available, each with its own advantages and disadvantages.   Some of the well-known brands of marine diesel engines include:

Man: German diesel engine manufacturer whose marine engines are known for their high power output and long service life.

Sulzer: A famous Swiss industrial engineering technology and machinery manufacturing company.

Wartsila: A power systems company from Finland with a history of nearly 180 years of providing land and offshore power systems and services.

Yanmar: Japanese brand of construction vehicles, agricultural machinery, diesel engines and small ships.

Caterpillar: A leading American manufacturer of diesel engines, its marine engines are known for their reliability, durability and fuel efficiency.

Cummins: American developer and manufacturer of diesel engines and gas-fuel engines.

Mitsubishi: A famous Japanese car manufacturer that also makes engines for maritime transport

Deutz: German diesel engine manufacturer whose marine engines are known for their reliability and fuel efficiency.

Daihautsu: Japanese engine manufacturer and automobile manufacturer.

Volvo Penta: Swedish marine and industrial engine manufacturer, part of the Volvo Group.

Perkins: British engine manufacturer and a subsidiary of Caterpillar.

Mtu: German diesel engine manufacturer whose marine engines are used on a variety of ships, including ferries and tankers.

Weichai: China's manufacturer of power systems, commercial vehicles, agricultural equipment, engineering machinery, smart logistics, and marine transportation equipment.

Quanchai: China's leader in diesel internal combustion engines.

Jichai: China’s earliest enterprise to independently develop and manufacture engines.

Yuchai: Chinese manufacturer engaged in engine manufacturing.

Zichai: China's key high-speed diesel engine manufacturing enterprise.

Guangchai: A professional manufacturer of medium-speed diesel engines and gas engines in China.

Hechai: China's research and development enterprise for light-duty, high-speed and high-power diesel engines.