Stihl MS 171 User Guide - Page 52
Check operation, of switch shaft, or carburetor
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2 3 Check operation of switch shaft: - Short circuit wire chafed? - Does contact spring make contact with short circuit wire in position "#"? - If necessary, install new wiring harness, b 9.6.2 Powerful yes spark? no Install new ignition module, b 9.1.1 yes Machine runs trouble-free, no further action necessary Engine runs MS 171, MS 181, MS 211 no -Look for fault in fuel system or carburetor - Check engine for leaks - Check position of flywheel on crankshaft, b 8.2, b 9.5 51
51
MS 171, MS 181, MS 211
Machine runs trouble-free,
no further action necessary
no
Install new
ignition module,
b
9.1.1
yes
no
–Look for fault in fuel system
or carburetor
– Check engine for leaks
– Check position of flywheel on
crankshaft,
b
8.2,
b
9.5
yes
Check operation
of switch shaft:
– Short circuit wire chafed?
– Does contact spring make contact
with short circuit wire in position “
#
“?
– If necessary, install new
wiring harness,
b
9.6.2
2
3
Powerful
spark?
Engine
runs