Fuel - Stihl Fs 131 Notice D'emploi

English
► Remove cutting attachment and its mounting
hardware from the gearbox – but do not
remove the thrust plate (9).

12 Fuel

This engine is certified to operate on unleaded
gasoline and the STIHL two-stroke engine oil at
a mix ratio of 50:1.
Your engine requires a mixture of high-quality
gasoline and two-stroke air cooled engine oil.
Use mid-grade unleaded gasoline with a mini‐
mum octane rating of 89 ((R+M)/2) and no more
than 10% ethanol content.
Fuel with an octane rating below 89 may
increase engine temperatures. This, in turn,
increases the risk of piston seizure and damage
to the engine.
The chemical composition of the fuel is also
important. Some fuel additives not only detrimen‐
tally affect elastomers (carburetor diaphragms,
oil seals, fuel lines, etc.), but magnesium cast‐
ings and catalytic converters as well. This could
cause running problems or damage the engine.
For this reason STIHL recommends that you use
only quality unleaded gasoline.
Gasoline with an ethanol content of more than
10% can cause running problems and major
damage in engines and should not be used.
For further details, see
www.STIHLusa.com/ethanol
The ethanol content in gasoline affects engine
speed – it may be necessary to readjust the car‐
buretor if you use fuels with various ethanol con‐
tents.
WARNING
To reduce the risk of personal injury from loss of
control and / or contact with the running cutting
tool, do not use your unit with incorrect idle
adjustment. At correct idle speed, the cutting tool
should not move.
If your power tool´s idle speed is incorrectly
adjusted, have your authorized STIHL servicing
dealer check your machine and make the proper
adjustments and repairs.
The idle speed and maximum speed of the
engine change if you switch from a fuel with a
certain ethanol content to another fuel with a
much higher or lower ethanol content.
22
This problem can be avoided by always using
fuel with the same ethanol content.
To ensure the maximum performance of your
STIHL engine, use a high quality 2-cycle engine
oil, such as STIHL 2-cycle engine oils. STIHL 2-
cycle engine oils are specially designed for
STIHL engines. To help your engine run cleaner
and reduce harmful carbon deposits, STIHL rec‐
ommends using STIHL HP Ultra 2-cycle engine
oil, or use an equivalent high quality 2-cycle
engine oil.
To meet the requirements of EPA and CARB we
recommend to use STIHL HP Ultra oil or equiva‐
lent.
Do not use NMMA or TCW rated (two-stroke
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, snowmo‐
biles, chain saws, mopeds, etc.).
Take care when handling gasoline. Avoid direct
contact with the skin and avoid inhaling fuel
vapor. When filling at the pump, first remove the
container from your vehicle and place the con‐
tainer 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.
The container should be kept tightly closed in
order to limit the amount of moisture that gets
into the mixture.
The machine's fuel tank should be cleaned as
necessary.
12.1 STIHL MotoMix
STIHL recommends the use of STIHL MotoMix.
STIHL MotoMix has a high octane rating and
ensures that you always use the right gasoline/oil
mix ratio.
STIHL MotoMix uses STIHL HP Ultra two-stroke
engine oil suited for high performance engines.
For further details, see
www.STIHLusa.com/ethanol
12.2 Fuel mix ages
If not using STIHL MotoMix, only mix sufficient
fuel for a few days of work, not to exceed
30 days of storage. Store in approved fuel-con‐
tainers only. When mixing, pour oil into the con‐
tainer first, and then add gasoline. Close the con‐
tainer and shake it vigorously by hand to ensure
proper mix of oil and gasoline.
12 Fuel
0458-432-8221-B