Fuel specifically formulated for use in boats and other watercraft often excludes ethanol. This exclusion is due to ethanol’s potential to cause damage to marine engines and fuel systems. For example, small engine components and fiberglass fuel tanks can degrade when exposed to ethanol blends.
The absence of ethanol in marine fuel is vital for preserving engine performance and longevity. Ethanol can absorb water, leading to phase separation and corrosion within the fuel system. These issues translate into reduced fuel efficiency, engine stalling, and costly repairs. Historically, traditional gasoline formulations were used universally; however, the introduction of ethanol as a fuel additive necessitated the development of ethanol-free alternatives for marine applications.
