SPECIFICATIONS
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Some of these adverse effects are caused because the alcohol in
the fuel can absorb moisture from the air, resulting in a separation
of the water/alcohol from the gasoline in the fuel tank.
The fuel system components on your Mercury engine will
withstand up to 10% alcohol content in the gasoline. We do not
know what percentage your boat’s fuel system will withstand.
Contact your boat manufacturer for specific recommendations on
the boats fuel system components (fuel tanks, fuel lines, and
fittings).
Fuel containing alcohol may increase:
• Corrosion of metal parts.
• Deterioration of rubber or plastic parts.
• Fuel permeation through rubber fuel lines.
• Starting and operating difficulties.
!
CAUTION
When operating a Mercury engine with fuel containing alcohol,
avoid storing the fuel in the fuel tank for long periods of time. Long
storage periods, common to boats, create unique problems. In
cars, alcohol‑blend fuels are normally consumed before they can
absorb enough moisture to cause trouble. However, boats often
sit idle long enough for phase separation to take place. In
addition, internal corrosion may take place during storage if
alcohol has washed protective oil films from internal
components.
IMPORTANT: Because of possible adverse effects of alcohol in
gasoline, it is recommended that only alcohol‑free fuel be used
where possible.
If only fuel containing alcohol is available, or if the presence of
alcohol is unknown, increased inspection frequency for leaks and
abnormalities is required.
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