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Tensioning the Saw Chain
(Quick chain tensioner)
1
2
Retensioning during cutting work:
:
Shut off the engine.
:
Pull out the hinged clip and loosen
the wingnut.
:
Turn the adjusting wheel (1)
clockwise as far as stop.
:
Tighten down the wingnut (2) firmly
by hand.
:
Fold down the hinged clip.
:
Follow instructions in "Checking
Chain Tension".
A new chain has to be retensioned more
often than one that has been in use for
some time.
:
Check chain tension frequently –
see "Operating Instructions".
30
Checking Chain Tension
:
Shut off the engine.
:
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.
:
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
"Operating Instructions".
Fuel
This engine is certified to operate on
unleaded gasoline and with the mix ratio
50:1.
Your engine requires a mixture of high-
quality premium gasoline and high-
quality two-stroke air-cooled engine oil.
Use premium branded unleaded
gasoline with a minimum octane rating
of 89 RON.
Note: Models equipped with a catalytic
converter require unleaded gasoline. A
few tankfuls of leaded gasoline can
reduce the efficiency of the catalytic
converter by more than 50%.
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 the 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
high-quality fuels!
MS 260
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