We get lots of questions about preventing the headaches ethanol-enhanced fuels can potentially cause in boat engines. Here’s some background, and things you can do to help prevent any issues in your boat’s fuel system. Ethanol has hygroscopic solvency properties. That’s a fancy term for A) it attracts and absorbs water, and B) it loosens debris in your fuel system. To help combat the issues these properties may cause, follow these simple four steps:

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Fuel System Tips
Do not
Mix ethanol blended fuel with regular fuel

Do
Periodically rinse top of tank and tank compartment with fresh water

Annually conduct a detailed inspection of all fuel system components

Check access plates on fuel tank hatches for water leaks; replace o-rings as needed

Replace fuel filter/water separators on an annual basis

Keep tanks full during long-term storage

Add fuel additives to fuel that will not be used for 60-90 days

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