Owner's Manual

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Turn off the engine.
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Wear work gloves.
Chain must fit snugly against the
underside of the bar - and, with the
chain brake disengaged, it must still be
possible to pull the chain along the bar
by hand.
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If necessary, retension the chain.
A new chain has to be retensioned
more often than one that has been in
use for some time -
Check chain tension frequently -
see section “During Operation”.
Fuel Mix
This engine is certified to operate on
unleaded gasoline and oil with the
mix ratio 50:1.
Your two-stroke engine requires a
mixture of brand-name gasoline and
quality two-stroke engine oil with the
classification TC.
Use regular branded unleaded gasoline
with a minimum octane rating of
90 ROZ (U.S.A./Canada: pump octane
min. 89!). If the octane number of the
regular grade gasoline in your area is
lower, use premium unleaded fuel.
Fuel with a lower octane rating may
result in preignition (causing “pinging”)
which is accompanied by an increase in
engine temperature. 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
(carburetor diaphragms, oil seals, fuel
lines etc.), but magnesium castings as
well. This could cause running problems
or even damage the engine. For this
reason it is essential that you use only
branded fuels!
Use only STIHL two-stroke engine oil or
equivalent branded two-stroke air-
cooled engine oils with the classification
TC for mixing.
Checking Chain Tension
All Versions
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!
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapour
(see “Safety Precautions”).
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 ages:
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.
Gaso- Oil (STIHL 50:1 or
line equivalent branded TC oils)
US gal. US fl.oz
1 2.6
2 1/2 6.4
512.8
Dispose empty mixing-oil canisters only
at authorized disposal locations.
143BA007 KN
017, 018 29