Stihl 034 Series

37034, 036, 036 QS
– The ohmmeter must now show a
reading of 0 Ω. If no reading is
obtained, check the connection
between the contact spring and
connector sleeve.
Checking short circuit wire and
STOP contact:
– Leave one test lead clipped to the
contact spring.
– On machines with carburetor
heating, pull the thermostatic
switch’s flag connector off the
contact spring.
– Move the Master Control lever
upwards to "STOP".
– Clip other lead to short circuit
wire’s terminal.
– The ohmmeter must again show
a reading of 0 Ω. If no reading is
obtained, check the connection
between the connector sleeve in
the switch shaft’s cam and the
contact spring.
– On machines with carburetor
heating, push the thermostatic
switch’s flag connector onto the
contact spring.
– Remove the air filter - see 12.1
– Remove the tank vent - see 12.6.
 The short circuit system is in
order if the short circuit wire
makes contact with the connector
sleeve when the Master Control
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lever is in the "STOP" position.
Replacing a bent or broken
contact spring:
– To avoid damaging the fuel hose,
pull it off the carburetor’s elbow
connector.
– On machines with carburetor
heating, pull the thermostatic
switch’s flag connector off the
contact spring.
 Pull the ground wire connector
sleeve out of the contact spring.
– Move Master Control lever to
"STOP" position.
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 Squeeze the contact spring so
that is disengages from the
Master Control lever and, at the
same time, use a screwdriver to
pry it out of its seat in the
crankcase.
– Install the new contact spring.
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– Reconnect the ground wire
connector sleeve.
Important:
– Check operation of the short
circuit wire - see 6.2.
– On machines with carburetor
heating, push the thermostatic
switch’s flag connector onto the
contact spring.
– Fit the tank vent - see 12.6.
– Fit the air filter - see 12.1.
6.3 STOP Contact