Tensioning The Saw Chain (Quick Chain Tensioner); Checking Chain Tension - Stihl MS 251 C-Q Instruction Manual

turn the adjusting wheel (4) a little
N
until the chain sprocket cover can
be slid completely against the
engine housing
Swing grip (5) into position (until it
N
engages)
Fit wing nut and tighten lightly
N
Next step: see "Tensioning the Saw
N
Chain"
MS 251 C-Q
Tensioning the Saw Chain
(quick chain tensioner)
1
2
Retensioning during cutting work:
Shut off the engine.
N
Pull out the hinged clip and loosen
N
the wingnut.
Turn the adjusting wheel (1)
N
clockwise as far as stop.
Tighten down the wingnut (2) firmly
N
by hand.
Fold down the hinged clip.
N
Go to "Checking Chain Tension"
N
A new chain has to be retensioned more
often than one that has been in use for
some time.
Check chain tension frequently –
N
see chapter on "Operating
Instructions".

Checking Chain Tension

Switch off the engine
N
Put on protective gloves
N
Press the throttle trigger lockout to
N
release the chain brake
The saw chain must lie against the
N
bottom of the bar – and it must be
possible to pull it across the guide
bar by hand when the chain brake is
released
If necessary, retension saw chain
N
A new saw chain must be retensioned
more frequently than one that has been
in use already for an extended period.
Check chain tension frequently –
N
see "Operating Instructions"
English
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