Saw chain runs continuously while engine is
idling
► Carry out the standard setting.
► Start the engine and disengage the chain
brake.
► Warm up the engine by opening and closing
the throttle for about 1 minute.
► Turn the idle speed screw (LA) counterclock‐
wise until the saw chain stops running.
► Turn the idle speed screw (LA) one full turn
counterclockwise.
18.4
Clearing the Combustion
Chamber
► Engage the chain brake.
2
1
0000-GXX-A379-A0
► Remove the filter cover (1).
► Pull off the spark plug boot (2).
► Unscrew the spark plug.
► Dry the spark plug.
WARNING
■ Unconfined sparks may occur if the starter grip
is pulled after the spark plug boot has been
removed. Sparks may cause a fire or an
explosion in an easily combustible or explo‐
sive environment. This can result in serious or
fatal injuries and damage to property.
► Move the Master Control lever to position
and hold it there before pulling the starter
grip.
► Move the Master Control lever to position
and hold it there.
► Pull the starter grip and guide it back several
times.
The combustion chamber is cleared.
► Insert and tighten down the spark plug.
2
0000-GXX-A380-A0
► Press the spark plug boot (2) firmly home.
► Fit the filter cover (1).
19 Specifications
19.1
STIHL MS 881 Chainsaw
–
Displacement: 121.6 cm³
–
Engine power to ISO 7293: 6.4 kW (8.7 bhp)
–
Idle speed to ISO 11681: 2800 ± 50 min
-1
–
Approved spark plug: Bosch WSR 6 F from
STIHL
–
Electrode gap of the spark plug: 0.5 mm
–
Dry weight without guide bar and saw chain
9.9 kg
–
Max. fuel tank capacity: 1300 cc (1.3 l)
–
Max. oil tank capacity: 700 cc (0.7 l)
19.2
Chain Sprockets and Chain
Speeds
The following chain sprockets may be used:
7-tooth for .404"
–
Maximum chain speed according to
ISO 11681: 27.1 m/s
–
Chain speed at maximum power: 23.9 m/s
19.3
Minimum Groove Depth of
Guide Bars
The minimum groove depth depends on the pitch
of the guide bar.
–
.404": 7 mm
19.4
Sound Values and Vibration
Values
–
Sound pressure level L
pA
measured according
to ISO 22868: 106 dB(A). The K value for the
sound pressure level is 2 dB(A).
–
Sound power level L
wA
measured according to
ISO 22868: 118 dB(A). K-value (uncertainty)
for sound power level is 2 dB(A).
–
Vibration level a
hv, eq
measured according to
ISO 22867
–
Handlebar: 8.9 m/s². The K value for the
vibration level is 2 m/s².
–
Control handle: 8.9 m/s². The K value for
the vibration level is 2 m/s².
English
19 Specifications
28
0458-890-8321-B. VA0.A21.
