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Mercury 25 Jet 4-Stroke User Manual

Mercury 25 Jet 4-Stroke
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FUEL & OIL
32
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
FIRE AND EXPLOSION HAZARD: Fuel leakage from any part
of the fuel system can be a fire and explosion hazard which can
cause serious bodily injury or death. Careful periodic inspection
of entire fuel system is mandatory, particularly after storage. All
fuel components should be inspected for leakage, softening,
hardening, swelling or corrosion. 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.

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Mercury 25 Jet 4-Stroke Specifications

General IconGeneral
Horsepower25 HP
Engine Type4-Stroke
Full Throttle RPM Range5000-6000 RPM
Fuel Induction SystemElectronic Fuel Injection (EFI)
Shaft Length15" / 20"
Gear Ratio2.08:1
Recommended Fuel87 octane / up to 10% ethanol
StartingElectric
Weight71 kg / 157 lbs (Lightest Model Available)
SteeringTiller
WOT RPM5000-6000 RPM

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