14.5.1 Troubleshooting Chart - Stihl MS 650 Manual

14.5.1 Troubleshooting Chart

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