99MS 650, MS 660
14.5.1 Troubleshooting Chart
Check generator
Resistance between engine ground
and generator connection
about 0.5 Ω?
Start
Do both handles
warm up?
Measure resistance of
individual heating elements
with ohmmeter
(On machines with carburetor pull connector
pins of wires from heating element on
carburetor out of round plug)
no
yes
Turn on
switch
yes
Resistance of
rear handle heating element
about 1 Ω?
Check rear handle heating element
In good condition?
Bonding OK?
Heater switch
on “#“?
no
no
no
Install new
rear handle
heating element
Install new
generator
yes
yes
yes
no
2
1
3
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