Fueling - Stihl MS 261 C-M Instruction Manual

Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
with a manually adjustable carburetor
and should not be used in such engines.
Engines equipped with M-Tronic can be
run on gasoline with an ethanol content
of up to 25% (E25).
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke air-
cooled engine oils for mixing.
We recommend STIHL 50:1 two-stroke
engine oil since it is specially formulated
for use in STIHL engines.
Do not use BIA or TCW (two-stroke
water cooled) mix oils!
Use only STIHL 50:1 heavy-duty engine
oil or an equivalent quality two-stroke
engine oil for the fuel mix in models
equipped with a catalytic converter.
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapour.
The canister should be kept tightly
closed in order to avoid any moisture
getting into the mixture.
The fuel tank and the canister in which
fuel mix is stored should be cleaned
from time to time.
Fuel mix ratio
Only mix sufficient fuel for a few days
work, not to exceed 30 days of storage.
Store in approved safety fuel-canisters
only. When mixing, pour oil into the
canister first, and then add gasoline.
MS 261 C-M
Examples
Gasoline Oil (STIHL 50:1 or equiva-
lent high-quality oils)
liters liters
1 0.02
5 0.10
10 0.20
15 0.30
20 0.40
25 0.50
Dispose of empty mixing-oil canisters
only at authorized disposal locations.

Fueling

(ml)
(20)
(100)
(200)
Preparing the machine
(300)
(400)
(500)
Before fueling, clean the cap and
N
the area around it to ensure that no
dirt falls into the fuel tank
Always position the machine so that
N
the cap is facing upwards
Opening
Raise the grip until it is upright.
N
English
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