49
MS 260
English / USA
Chain runs when engine is idling
:
Carry out standard setting on low
speed screw (
L
).
:
Turn the idle speed screw (
LA
)
counterclockwise until chain begins
to run – then turn it another
1
/
4
turn
in the same direction.
Erratic idling behavior, poor
acceleration
(even though standard setting of low
speed screw is correct)
Idle setting is too lean.
:
Turn the low speed screw (
L
)
counterclockwise (no further than
stop) until 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
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 low on power, check the
spark arresting screen* in the muffler.
:
Take out 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 it down.
*
See "Guide to Using this Manual"
Spark Arresting Screen*
in Muffler
1
143BA036 KN
2
143BA037 KN
Summary of Contents for MS 260
Page 69: ...68 English USA MS 260 ...
Page 137: ...136 español EE UU MS 260 ...
