5HWHQVLRQLQJGXULQJFXWWLQJZRUN
•
Turn off the engine and then
slacken the nuts.
•
Hold the bar nose up and use
screwdriver to turn tensioning
screw
clockwise until chain fits
snugly against the underside of the
bar -
while still holding bar nose up,
tighten down the nuts
ILUPO\
A new chain has to be retensioned
more often than one that has been in
use for some time.
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•
Turn off the engine.
•
Wear work gloves to protect your
hands.
•
Pull the hand guard toward the
rear handle.
•
Press down throttle trigger interlock
to release the chain brake.
•
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.
•
Release the throttle trigger interlock.
•
If necessary, retension the chain.
A new chain has to be retensioned
more often than one that has been in
use for some time.
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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
FODVVLILFDWLRQ7&
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.
46
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