Throttle Rod; Removing And Installing The Intake Manifold - Stihl MS 240 Instruction Manual

Saw chain rotates at idle speed
– Turn the idle speed screw (LA)
counterclockwise until the chain
stops running, then turn it back
one quarter turn.
Erratic idling behavior, poor
acceleration
(although standard setting is
correct)
Idle setting too lean.
– Allow engine to warm up.
– Turn 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).
Adjustment for operation at high
altitude
A minor correction may be
necessary if engine power is not
satisfactory when operating at high
altitude.
– Check standard setting.
– Allow engine to warm up.
– Turn the high speed screw (H)
clockwise (leaner) – no further
than stop.
Turn the adjusting screws only very
slightly. Even minor adjustments
can noticeably affect engine running
behavior.
If the setting is made too lean there
is a risk of engine damage as a
result of lack of lubrication and
overheating.
94
If the adjustments produce no
improvement, see the
troubleshooting charts for the
ignition system, carburetor and
engine, b 4.5,
b 4.6 and b 4.7
14.6

Throttle Rod

1
2
– Remove the carburetor, b 14.2
: Turn the throttle trigger (1)
slightly and disconnect the
throttle rod (2).
– Check the throttle rod and
replace if necessary
– Reassemble in the reverse
sequence.
– Turn the throttle trigger (1)
slightly and attach the throttle rod
(2).
– Install the carburetor, b 14.2
– Reassemble all other parts in the
reverse sequence.
14.6.1 Removing and Installing
the Intake Manifold
A damaged intake manifold can
result in engine running problems.
– Troubleshooting, b 4.6 or
b 4.7
– Remove the shroud, b 8.4
– Remove the carburetor, b 14.2
– Take out the annular buffer/tank
housing mounting screws.
Annular buffer at ignition side,
b 11.3.
Annular buffer at clutch side,
b 11.2
1
: Remove the washer (1) and ring
(2).
MS 240, MS 260, MS 260 C
2