Stihl MS 661 Manual page 130

Component
Generator
Circuit Diagram
G
MS 661, MS 661 C-M
Ohmmeter connection
(use either test lead)
Lead 1 Lead 2
Connector Ground
on
generator
wire
1 4
2
5
3
Resistance Ω
If faulty
Spec. Actual Cause
0.6 0.5 - 1 Generator OK
- Break in wire,
generator damaged
0 Short circuit –
damaged insulation
G = Generator
1 = Rear handle
2 = Handlebar
3 = Heater switch
4 = Thermostatic switch
5 = Heating element (carburetor)
Remedy
Install new
generator
repair insulation
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