Evinrude E25DELSES, Operator'S Manual, Page: 21 / 80

18
Using Your E-TEC Outboard
FUEL REQUIREMENTS
IMPORTANT: Always use fresh gasoline.
Gasoline will oxidize; the result is loss of oc-
tane, volatile compounds, and the production
of gum and varnish deposits which can de-
grade the fuel system.
Minimum Octane
Your outboard is certified to operate on un-
leaded automotive gasoline with an octane
rating equal to or higher than:
• 87 (R+M)/2 AKI — Inside the U.S.
• 90 RON — Outside the U.S.
Using unleaded gasoline that contains methyl
tertiary butyl ether (MTBE) is acceptable
ONLY if the MTBE content does not exceed
15% by volume.
Alcohol Fuels
Your outboard has been designed to operate
using the specified fuels; however, be aware
of the following:
• The boat’s fuel system may have different
requirements regarding the use of alcohol
fuels. Refer to the boat’s owner guide.
• Alcohol attracts and holds moisture that can
cause corrosion of metallic parts in the fuel
system.
• Alcohol blended fuel may cause engine per-
formance problems.
WARNING
Gasoline is extremely flammable and
highly explosive under certain condi-
tions. Follow the instructions in this
section explicitly. Improper handling of
fuel could result in property damage,
serious injury or death.
Leaking fuel is a fire and explosion haz-
ard. All parts in the fuel system should
be inspected frequently and replaced if
signs of deterioration or leakage are
found. Inspect the fuel system each
time you refuel, each time you remove
the engine cover and annually.
Follow these instructions to ensure
safety when handing fuel:
• Always turn off the engine before fuel-
ing.
• Never permit anyone other than an
adult to refill the fuel tank.
• Do not fill the fuel tank all the way to
the top or fuel may overflow when it
expands due to heating by the sun.
• Remove portable fuel tanks from the
boat before fueling.
• Always wipe off any fuel spillage.
• Do not smoke, or allow open flames,
or sparks or use electrical devices
such as cellular phones in the vicinity
of a fuel leak or while fueling.
• Always work in a well ventilated area.
Using alcohol-extended fuels is acceptable
ONLY if the alcohol content does not exceed:
• 10% ethanol by volume; or
• 5% methanol with 5% cosolvents by volume.