Tensioning The Chain; Checking Chain Tension; Fuel - Stihl MS 261 C-M Instruction Manual

7 Tensioning the Chain

6.3 Fitting the chain
WARNING
Wear work gloves to protect your hands from the
sharp cutters.
► Fit the chain – start at the bar nose.
3
► Fit the guide bar over the studs (1) – the cut‐
ting edges on the top of the bar must point to
the right.
► Engage the peg of the tensioner slide in the
locating hole (2) –- place the chain over the
sprocket (3) at the same time.
► Turn the tensioning screw (4)clockwise until
there is very little chain sag on the underside
of the bar – and the drive link tangs are
engaged in the bar groove.
► Refit the sprocket cover and tighten the nuts
only moderately by hand (they are finally tight‐
ened after the saw chain is tensioned).
► Go to chapter on "Tensioning the Saw Chain"
0458-153-8221-C
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7 Tensioning the Chain
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Retensioning during cutting work:
► Shut off the engine.
► Loosen the nuts.
► Hold the bar nose up.
► Use a screwdriver to turn the tensioning
screw (1) clockwise until the chain fits snugly
against the underside of the bar.
► While still holding the bar nose up, tighten
down the nuts firmly.
► Go to "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 chapter
on "Operating Instructions".
8

Checking Chain Tension

► Shut off the engine.
► Wear work gloves to protect your hands.
► The chain must fit snugly against the under‐
side of the bar and 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 chapter
on "Operating Instructions".
9

Fuel

This engine is certified to operate on unleaded
gasoline and with the mix ratio 50:1.
English
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