If the gasoline in your area contains either methanol (methyl alcohol) or ethanol
(ethyl alcohol), you should be aware of certain adverse effects that can occur.
These adverse effects are more severe with methanol. Increasing the
percentage of alcohol in the fuel can also worsen these adverse effects.
Some of these adverse effects are caused because the alcohol in the gasoline
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 Marine 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 boat's fuel system components (fuel tanks, fuel lines,
and fittings). Be aware that gasolines containing alcohol may cause increased:
• Corrosion of metal parts
• Deterioration of rubber or plastic parts
• Fuel permeation through rubber fuel lines
• Starting and operating difficulties
!
WARNING
Fuel leakage is a fire or explosion hazard, which can cause serious injury or
death. Periodically inspect all fuel system components for leaks, softening,
hardening, swelling, or corrosion, particularly after storage. Any sign of
leakage or deterioration requires replacement before further engine
operation.
Because of possible adverse effects of alcohol in gasoline, it is recommended
that only alcohol‑free gasoline 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.
IMPORTANT: When operating a Mercury Marine engine on gasoline containing
alcohol, storage of gasoline in the fuel tank for long periods should be avoided.
Long periods of storage, common to boats, create unique problems. In cars,
alcohol‑blend fuels normally are consumed before they can absorb enough
moisture to cause trouble, but 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.
Fuel Additives
To minimize carbon deposit buildup in the engine, add Mercury or Quicksilver
Quickleen Engine and Fuel System Cleaner to the engine's fuel at each tank
throughout the boating season. Use the additive as directed on the container.
Low Permeation Fuel Hose Requirement
Required for outboards manufactured for sale, sold, or offered for sale in the
United States.
FUEL AND OIL
42 eng
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