Is water in diesel fuel considered a major issue for marine engines?

Water in diesel fuel is indeed considered a major issue for marine engines, making the assertion that it is not a problem inaccurate. When water contaminates diesel fuel, it can lead to several detrimental effects on engine performance and reliability.

Water does not combust in the same way that diesel does, which means that its presence in the fuel can cause incomplete combustion, leading to poor engine performance. It can result in knocking, reduced power output, and increased emissions. Furthermore, water in the fuel can lead to rust and corrosion in the fuel system, including the injectors, fuel pump, and tank. This can result in expensive repairs and potential engine failure.

Additionally, the presence of water can promote the growth of microorganisms, such as bacteria and fungi, which thrive in the water-fuel interface. These organisms can clog fuel filters and damage fuel systems, further complicating maintenance and operational efficiency.

In summary, the presence of water in diesel fuel is indeed a significant issue for marine engines, as it can adversely affect performance, cause mechanical damage, and lead to fuel system failures.