Spark Arresting Screen In Muffler - Stihl MS 260 Instruction Manual

English
H L
3/4 1
N Turn high speed screw (H)
counterclockwise as far as stop (no
more than 3/4 turn).
N Turn the low speed screw (L)
carefully clockwise as far as stop,
then turn it back 1 turn.
Adjusting Idle Speed
Engine stops while idling
N
Carry out standard setting on low
speed screw (L).
N Turn the idle speed screw (LA)
clockwise until the chain begins to
run – then back it off 1/4 turn.
Chain runs when engine is idling
N Carry out standard setting on low
speed screw (L).
N Turn the idle speed screw (LA)
counterclockwise until the chain
stops moving – then turn it another
1/4 turn in the same direction.
If the chain continues moving
when the engine is idling, have
your saw checked and repaired by
your servicing dealer.
32
Erratic idling behavior, poor
acceleration (even though standard
setting of low speed screw is correct)
N Idle setting is too lean: Turn the low
speed screw (L) counterclockwise
until the engine runs and
accelerates smoothly.
It is usually necessary to change the
setting of the idle speed screw (LA) after
every correction to the low speed
screw (L).
Fine tuning for operation at high
altitude or at sea level
A slight correction of the setting may be
necessary if engine does not run
satisfactorily:
N Check the standard setting.
N Warm up the engine.
N 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.
Spark Arresting Screen in
Muffler
In some countries the muffler is
equipped with a spark arresting screen.
N If the engine is down on power,
check the spark arresting screen in
the muffler.
N Wait for the muffler to cool down.
1
N Take out the screw (1).
2
N Pull out the spark arresting
screen (2).
N Clean the spark arresting screen. If
the screen is damaged or heavily
carbonized, fit a new one.
N Refit the spark arresting screen.
N Insert the screw and tighten it down.
MS 260, MS 260 C