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37MS 290, MS 310, MS 390

The ignition module accommodates

all the components required to

control ignition timing. There are

two electrical connections on the

coil body:

: High voltage output for ignition

lead (1)

209RA112

: Connector tag (2) for the short

circuit wire

Testing in the workshop is limited to

a spark test.

A new ignition module must be

installed if no ignition spark is

obtained (after checking that wiring

and stop switch are in good

condition)..

Ignition timing is fixed and cannot

be adjusted during repair or

servicing work

Since there is no mechanical wear

in these systems, ignition timing

cannot get out of adjustment as a

result of wear.

– Remove the handle housing,

b 9.2

: Pull the spark plug boot (1) off the

spark plug.

: Pull ignition lead (3) out of

retainer (2).

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: Pull the ignition lead (3) out of the

guide (arrows).

: Take out the screw (1) and

remove the ground wires

(arrows).

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7.1 Ignition Module 7.1.1 Ignition Timing 7.1.2 Removing and Installing

Stihl MS 390 User Manual

Other manuals for Stihl MS 390