MerCruiser Scorpion 350, User Manual

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Section 4 - Specifications
Page 44 90-899883175 DECEMBER 2007
Fuel Requirements
NOTICE
Running out of fuel can damage catalyst components. Do not allow the fuel tanks to
become empty during operation.
IMPORTANT: Use of improper gasoline can damage your engine. Engine damage
resulting from the use of improper gasoline is considered misuse of the engine and
will not be covered under the limited warranty.
US and Canada
Fuel type Minimum posted octane
Unleaded 89 (R+M)/2
Outside the US and Canada
Fuel type Minimum posted octane
Unleaded 95 RON
Using Reformulated (Oxygenated) Gasoline (USA Only)
Reformulated gasoline is required in certain areas of the USA and is acceptable for use in
your Mercury MerCruiser engine. The two types of oxygenates used in these fuels are
alcohol (ethanol) and ether (MTBE or ETBE). If ethanol is the oxygenate that is used in the
gasoline in your area, refer to
Gasoline Containing Alcohol
.
Gasoline Containing Alcohol
If the gasoline in your area contains either methanol (methyl alcohol) or ethanol (ethyl
alcohol), be aware of possible adverse effects. These adverse effects are more severe with
methanol and worsen according to the percentage of alcohol in the fuel.
Alcohol in gasoline can absorb moisture from the air, causing the water and the alcohol to
separate from the gasoline in the fuel tank.
IMPORTANT: The fuel system components on your Mercury MerCruiser 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 your boat's fuel system components (fuel tanks, fuel lines, and
fittings).
Be aware that gasoline 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.
IMPORTANT: If you use gasoline that contains or might contain alcohol, you must increase
the frequency of inspection for leaks and abnormalities.