Stihl MS 441 Manual page 15

Condition
No spark
14
Cause
Spark plug faulty
Faulty insulation or short-circuit in
short circuit wire
Break in ignition lead or insulation
damaged
Ignition module faulty
Remedy
Install new spark plug
Check short circuit wire for short-
circuiting to earth
Check ignition lead, replace
if necessary
Install new ignition module
MS 441, MS 441 C