Only machines with high speed screw (H)
Operation at High Altitude
A slight correction of the setting may be necessary if engine power is not satisfactory:
:Check the standard setting.
:Warm up the engine.
:Turn high speed screw (H) slightly clockwise (leaner) – no further than stop.
If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating.
MS 270, MS 270 C, MS 280, MS 280 C
Machines with Intelligent Engine Management
The carburetor adjusts automatically to any change in operating conditions (e.g. cutting at high altitude).
The automatic adjustment process can be speeded up as follows:
:Run the engine for about 10 seconds at full throttle – with the chain and bar mounted.
:Perform five uniform cross cuts at full throttle.
English / USA
Spark Arresting Screen* in Muffler
:If the engine is low on power, check the spark arresting screen in the muffler.
:Allow muffler to cool down.
2
1
146BA008 KN
Remove the screw (1).
Pull out spark arresting screen (2).
:Clean spark arresting screen if necessary – if screen is damaged or coked up, fit a new one.
:Refit the spark arresting screen.
:Insert screw and tighten down.
*see “Guide to Using this Manual”
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