Spark Arresting Screen In Muffler - Stihl MS 461 Instruction Manual

English
Turn the high speed screw (H)
N
counterclockwise as far as possible
(max. 3/4 turn)
Turn the low speed screw (L)
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clockwise – as far as possible – then
back off 1/4 turn
Setting the idle speed
Engine stops when idling or saw chain
rotates at idle speed
Check the standard setting
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Turn the idle speed adjusting
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screw (LA) clockwise until the saw
chain begins to run – then turn it
back 1 1/2 turns.
If the saw chain continues to keep
rotating in idle even after adjustment,
have the chain saw checked by a
servicing dealer.
30
Speed erratic when idling; poor
acceleration (despite low speed
screw = 1/4)
Idle speed setting is too lean – turn
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the low speed screw (L)
counterclockwise until the engine
runs and accelerates smoothly
Whenever the low speed screw (L) has
been adjusted, it usually also necessary
to adjust the idle speed screw (LA).
Correcting the carburetor setting for use
at high altitudes
The setting may have to be marginally
corrected if engine performance is
unsatisfactory at high altitudes:
Check the standard setting
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Let the engine warm up
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Turn the high speed screw (H)
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slightly clockwise (leaner) – max. up
to the stop
After descending from a high altitude,
restore the carburetor setting to the
standard setting.
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
In some countries, the muffler is fitted
with a spark arresting screen.
If engine performance deteriorates,
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check the spark arresting screen in
the muffler
Let the muffler cool down
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1
3
2
Remove four screws
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Remove exhaust casing (1) of the
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muffler
Bend back the retaining lugs (2)
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Pull out spark arresting screen (3)
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Clean the dirty spark arresting
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screen, replace if damaged or
heavily carbonized
Refit the spark arresting screen in
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reverse order of steps
MS 461