Stihl FS 251 R Notice D'emploi page 24

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can be avoided by always using an ethanol-free
fuel or fuel with consistent ethanol levels.
STIHL MotoMix
STIHL MotoMix is ethanol-free, has a high
octane rating and ensures that you always use
the right gasoline/oil mix ratio.
STIHL MotoMix uses STIHL HP Ultra 2-Cycle
Engine Oil suited for high performance engines.
For further details, see www.STIHLusa.com/
ethanol.
STIHL recommends using MotoMix in your trim‐
mer / brushcutter. If not using MotoMix, use only
STIHL HP Ultra 2-Cycle Engine Oil or equivalent
high quality 2-cycle engine oils that are designed
for use in air cooled 2-cycle engines.
The use of non-seasonal gasoline blends may
increase the potential for pressure to build in the
fuel tank during operation. For example, using a
winter blend during the summer will increase
pressure in the fuel tank. Always use gasoline
blends appropriate to the season, altitude and
other environmental factors.
Do not use NMMA or TCW rated (2-cycle water
cooled) mix oils or other mix oils that state they
are for use in both water cooled and air cooled
engines (e.g., outboard motors, snowmobiles,
chain saws, mopeds, etc.).
Mixing Fuel
WARNING
■ Take care when handling gasoline. Avoid
direct contact with the skin and avoid inhaling
fuel vapor. Anytime you are filling a container
at the fuel pump, remove the container from
your vehicle and place it on the ground before
filling. To reduce the risk of sparks from static
discharge and resulting fire and/or explosion,
do not fill fuel containers that are sitting in or
on a vehicle or trailer.
24
10 Mixing Fuel and Refueling the Trimmer / Brushcutter
WARNING
■ Shaking fuel can cause pressure to build in
the fuel container. To reduce the risk of fire
and severe personal injury or property dam‐
age from fuel spraying, allow the fuel container
to sit for several minutes before opening.
Open the container slowly to release any
residual pressures. Never open the fuel con‐
tainer in the vicinity of any ignition source.
Read and follow all warnings and instructions
that accompany your fuel container.
To properly mix fuel:
► If not using STIHL MotoMix, only mix sufficient
fuel for a few days of work. Never mix more
than a 30-day supply of fuel.
► Store the fuel mix in an approved fuel con‐
tainer.
► Depending on the required amount of fuel,
determine the correct amounts of 2-cycle
engine oil and gasoline in a mix ratio of 50:1.
Examples for fuel mixes:
– 1 US gals of gasoline: 2.6 oz. of 2-cycle
engine oil
– 2.5 US gals of gasoline: 6.4 oz. of 2-cycle
engine oil
– 5 US gals of gasoline: 12.8 oz. of 2-cycle
engine oil
► When mixing, pour oil into the container first,
and then add gasoline. Close the container
and shake it by hand to ensure proper mix of
oil and gasoline.
► Dispose of empty mixing-oil containers only at
authorized disposal locations.
10.2 Refueling the Trimmer / Brush‐
cutter
WARNING
■ Removing the fuel cap on a pressurized fuel
tank can result in gasoline, vapors and fumes
being forcefully sprayed out from the tank in all
directions. The escaping gasoline, vapors or
fumes, sometimes referred to as fuel spraying
or "geysering," can cause serious personal
injury, including fire and burn injury, or prop‐
erty damage, 5.6.
0458-853-8201-A