Stihl MS 441 - Page 126

125MS 441, MS 441 C
Complete system
The generator and heating element
are checked in the following test,
which should be performed at an
ambient temperature of at least
+20°C (68°F).
If the temperature is below + 13 °C
(55 °F), the thermostatic switch may
close and produce false readings.
Check the carburetor heating in
accordance with the
troubleshooting chart, carburetor
heating, b 15.2.
– Remove filter base, b 14.1.2.
– Set ohmmeter to measuring
range "Ω".
: Clip one of the two test leads onto
the carburetor and the other onto
a cylinder fin.
– If the system is in good condition,
the ohmmeter will indicate
about 8 ohm in the measuring
range "Ω".
100
50
30
20
10
5
0
20
10
5
1
2
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To ensure good electrical contact,
press the heating plate and heating
element against the carburetor
during the measurement.
If the reading obtained is outside
this tolerance, each component
must be tested separately.
Heating element
– Remove air filter, b 14.1.
: Pull wiring (1) out of retainers
(arrows).
– Remove filter base, b 14.1.2.
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1
– Push insulating tube towards the
heating element and unplug the
connectors.
: Remove heating element (1).
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1