TS 480i, TS 500i
English
37
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 fresh, 
high-quality gasoline and two-stroke air 
cooled engine oil. Operators who are not 
using MotoMix should never use fuel 
that has been stored for more than thirty 
(30) days.
Use mid-grade unleaded gasoline with a 
minimum octane rating of 89 ((R+M)/2) 
and no more than 10% ethanol content.
NOTICE
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 detrimentally affect elastomers (oil 
seals, fuel lines, etc.), but magnesium 
castings and catalytic converters as 
well. This could cause running problems 
or damage the engine. For this reason 
STIHL recommends that you use only 
MotoMix or another quality unleaded 
gasoline.
NOTICE
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
WARNING
To reduce the risk of personal injury 
from loss of control and/or contact with 
the running wheel, do not use your unit 
with an incorrect idle adjustment. When 
the idle speed is properly adjusted, the 
wheel should not move while the 
machine is idling.
If your cut-off machine’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 to a fuel 
with a much higher or lower ethanol 
content.
This problem can be avoided by always 
using fuel with the same ethanol 
content, which should never exceed 
10%.
To ensure the maximum performance of 
your STIHL engine, use a fresh, high 
quality 2-cycle engine oil. To help your 
engine run cleaner and reduce harmful 
carbon deposits, STIHL recommends 
using STIHL HP Ultra 2-cycle engine oil 
or ask your dealer for an equivalent, fully 
synthetic 2-cycle engine oil if you are not 
using MotoMix.
We recommend using STIHL MotoMix 
or a fresh, high quality gasoline of at 
least 89 octane and STIHL HP Ultra oil.
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. It also contains no ethanol.
STIHL MotoMix uses STIHL HP Ultra 
two-stroke engine oil suited for high 
performance engines.
If not using MotoMix, use only STIHL 
two-stroke engine oil or equivalent high-
quality two-stroke engine oils that are 
designed for use in air cooled two-cycle 
engines.
Do not use BIA 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, snowmobiles, 
chain saws, mopeds, etc.).
WARNING
Take care when handling gasoline. It is 
extremely flammable. Avoid direct 
contact with the skin and avoid inhaling 
fuel vapor. Transport and store fuel only 
in approved containers. When filling at 
the pump, remove the fuel 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.
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.
Fuel