MS 270, MS 270 C, MS 280, MS 280 C
English
31
N Check the standard setting
N Let the engine warm up
N Turn the high speed screw (H)
slightly clockwise (leaner) – max. up
to the stop
Only machines with intelligent engine
management
When working under altered conditions
(e.g., at high altitudes), adaptation to the
new conditions takes place
automatically.
The automatic adaptation can be
speeded up as follows:
N Open the throttle fully for approx.
10 seconds – the chain and guide
bar must be fitted
N Carry out five uniform cuts to length
under full load.
In some countries, the muffler is fitted
with a spark arresting screen.
N If engine performance deteriorates,
check the spark arresting screen in
the muffler
N Let the muffler cool down
N Remove screw (1)
N Pull out spark arresting screen (2)
N Clean the dirty spark arresting
screen, replace if damaged or
heavily carbonized
N Refit the spark arresting screen
N Insert and tighten down the screw
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Remove the spark plug
N Move the Master Control lever to the
stop position 0
N Turn the knob (1) above the rear
handle in the direction of the arrow
and remove the carburetor box
cover (2)
If you make the setting too lean it
will increase the risk of engine
damage through lack of
lubrication and overheating.
Spark Arresting Screen in
Muffler
146BA008 KN
1
2
Spark Plug
1
146BA010 KN
2
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