Stihl MS 650 Manual page 101

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100
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Test ground wire between connector tags
and crankcase
Resistance between connectors tags and
crankcase about 0 Ω ?
yes
Pull connectors off
heater switch
Test front handle
heating element
Resistance about. 7 Ω?
yes
Check heater switch
(contact sleeve against switch housing)
Closed: about 0 Ω ?
Open: Circuit interrupted
yes
(On machines with carburetor heating,
refit connector pin of wire
from heating element in the
round plug)
System in order
Install new
no
ground wire
Install new
no
front handle
Install new
no heater switch
MS 650, MS 660
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