Stihl MS 311, Руководство пользователя, Страница: 82 / 94

81 MS 311, MS 391
Standard Setting
– Shut off the engine.
– Turn the high speed screw ( H )
slowly counterclockwise as far as
stop, but not more than a 3/4 turn.
– Turn the low speed screw ( L )
slowly clockwise as far as stop,
then turn it back 1 full turn.
Adjusting engine idle speed
– Carry out standard setting.
– Warm up the engine.
Engine stops while idling
– Turn the idle speed screw ( LA )
clockwise until the chain begins
to run, then turn it back 1/2 a turn.
Saw chain runs while engine is
idling
– Turn the idle speed screw ( LA )
counterclockwise until the chain
stops running, then turn it back
1/2 a turn.
Erratic idling behavior, poor
acceleration
(although standard setting is
correct)
Idle setting too lean.
– Warm up the engine.
– 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 (
L )
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.
– Warm up the engine.
– 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.
12.8 Carburetor Carrier
– Remove the carburetor, b 12.5
: Take out the sleeve (2) and
washer (1).
– Disconnect fuel suction hose
from the carburetor carrier.
: Push the manifold flanges (1) out
of the carburetor carrier (2) in the
direction of the cylinder.
– Remove the carburetor
carrier (2).
4903RA230 TG
1
2
4903RA231 TG
1
1
2