Stihl MS 661 Manual page 128

1
Expose and separate connectors of
handlebar heating element,
Test handlebar heating element
(contact sleeve against switch housing)
Open: Circuit interrupted,
MS 661, MS 661 C-M
2
b 10.5.1
Resistance about 6.4Ω?
yes
Check the heater switch
Closed: about 0Ω?
b 14.3
yes
Reconnect connector to
thermostatic switch,
b 13.4
System in order
Replace
no
handlebar
b 10.5.1
Replace
no
heater switch
b 14.4
3
127