30
English
FS 120, FS 200, FS 250
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 3 months of storage. 
Store in approved safety fuel-canisters 
only. When mixing, pour oil into the 
canister first, and then add gasoline.
Examples
Dispose of empty mixing-oil canisters 
only at authorized disposal locations.
Before fueling, clean the filler cap and 
the area around it to ensure that no dirt 
falls into the tank.
Always thoroughly shake the mixture in 
the can before fueling your machine.
In order to reduce the risk of burns 
or other personal injury from 
escaping gas vapor and fumes, 
remove the fuel filler cap carefully 
so as to allow any pressure build-up 
in the tank to release slowly..
After fueling, tighten down the filler 
cap by hand as securely as 
possible.
Gasoline Oil (STIHL 50:1 or 
equivalent high-quality 
oils)
liters liters (cm
3
)
10.02  (20)
5 0.10 (100)
10 0.20 (200)
15 0.30 (300)
20 0.40 (400)
25 0.50 (500)
Fueling
256BA060 KN