Stihl MS 461 R Product Instruction Manual - Page 45

Spark Arresting Screen, in Muffler - tuning

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English / USA Spark Arresting Screen in Muffler* Adjusting idle speed H 3/4 L 1/4 L LA Engine stops while idling : Open the low speed screw (L) counterclockwise one quarter of a turn from max. lean setting. : Turn the idle speed adjusting screw (LA) clockwise until chain begins to run - then back off the screw one quarter of a turn. Chain runs when engine is idling : Open the low speed screw (L) counterclockwise one quarter of a turn from max. lean setting. : Turn the idle speed adjusting screw (LA) counterclockwise until chain stops running - then turn screw another quarter 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. 176BA012 KN 176BA010 KN Erratic idling behavior, poor acceleration (even though you have opened low speed screw one quarter of a turn) Idle setting is too lean. : Turn the low speed adjusting screw (L) counterclockwise until engine runs and accelerates smoothly. It is usually necessary to change the setting of the idle speed adjusting screw (LA) after every correction to the low speed adjusting screw (L). Fine Tuning for Operation at High Altitude A slight correction of the setting may be necessary if engine power is not satisfactory when operating at high altitude: : Check the standard setting. : Warm up the engine. : Turn high speed screw (H) slightly clockwise (leaner). On models with H = 3/4 , turn no further than stop. If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating. 3 2 11 If the engine is down on power, check the spark arresting screen in the muffler : Allow muffler to cool down. MS 460 Magnum only: : Take out the screws (1) : Remove the cover plate (2). : Remove the spark arresting screen (3). : Clean spark arresting screen. If screen is damaged or heavily carbonized, fit a new one. : Refit the spark arresting screen in the reverse sequence. * see „Guide to Using this Manual" 44 MS 460, MS 460 R

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44
English / USA
MS 460, MS 460 R
Adjusting idle speed
Engine stops while idling
:
Open the low speed screw
(L)
counterclockwise one quarter of a
turn from max. lean setting.
:
Turn the idle speed adjusting screw
(LA)
clockwise until chain begins to
run –
then back off the screw one
quarter of a turn.
Chain runs when engine is idling
:
Open the low speed screw
(L)
counterclockwise one quarter of a
turn from max. lean setting.
:
Turn the idle speed adjusting screw
(LA)
counterclockwise until chain
stops running – then turn screw
another quarter 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.
Erratic idling behavior, poor
acceleration
(even though you have opened low
speed screw one quarter of a turn)
Idle setting is too lean.
:
Turn the low speed adjusting screw
(L)
counterclockwise until engine
runs and accelerates smoothly.
It is usually necessary to change the
setting of the idle speed adjusting screw
(LA)
after every correction to the low
speed adjusting screw
(L)
.
Fine Tuning for Operation at High
Altitude
A slight correction of the setting may be
necessary if engine power is not
satisfactory when operating at high
altitude:
:
Check the standard setting.
:
Warm up the engine.
:
Turn high speed screw (
H
) slightly
clockwise (leaner). On models with
H
=
3
/
4
, turn no further than stop.
If the
setting is too lean
there is
a
risk of engine damage
due to
insufficient lubrication and
overheating.
If the engine is down on power, check
the spark arresting screen in the muffler
:
Allow muffler to cool down.
MS 460 Magnum only:
:
Take out the screws
(1)
:
Remove the cover plate
(2)
.
:
Remove the spark arresting
screen
(3)
.
:
Clean spark arresting screen.
If screen is damaged or heavily
carbonized, fit a new one.
:
Refit the spark arresting screen in
the reverse sequence.
*
see „Guide to Using this Manual“
LA
L
176BA012 KN
4
L
H
3
1
/
4
/
Spark Arresting Screen
in Muffler*
176BA010 KN
3
2
1
1