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Technical Information 04.2013
TI_04_2013_30_01_01.fm
4. Repairs
This Technical Information bulletin and the STIHL
MS 362 service manual are available for servicing
and repairs. Existing special servicing tools are
listed
in the service manual and can be used for
this machine.
Note
Due to the stop switch function of the new Master
Control Lever™, the ignition is always switched on.
– This means the engine can start at any time if
the starter rope is pulled.
– To reduce the risk of fire caused by sparking
outside the cylinder, do not crank the engine
with the rewind starter when the spark plug boot
is disconnected or when the spark plug has
been unscrewed.
4.1 Troubleshooting
The STIHL MDG 1 engine analyzer can be used to
test ignition module and control unit STIHL
(M-Tronic™) and connected electrical components
quickly and reliably. To do this, follow the steps in the
diagnostics software after connecting the analyzer.
Apart from troubleshooting with the aid of the
STIHL MDG 1, the charts in TI 45.2010 can also
provide assistance in tracing a problem.
All other diagnostic and repair procedures remain
unchanged.
4.2 Control Unit
4.2.1 Removing the Control Unit
. Remove the shroud, fan housing and pre-
separator.
. Pull off the boot and unscrew the spark plug.
. Remove the air guide shroud.
The wiring harness is secured to the control unit with
a screw mounted connector housing.
. Loosen screw (1) 1 – 2 turns.
. Apply a wide tipped screwdriver (e.g. STIHL
combination wrench) to the tab (arrow) and pry
the connector housing (2) off the control unit's
contacts.
. Take out the screws (3) and remove the control
unit (4).
4.2.2 Installing the Control Unit
. Place the control unit in the crankcase.
. Adjust the air gap between the arms of the
control unit and the north/south pair of magnet
poles marked "N" / "S" on the flywheel – use
STIHL setting gauge 1111 890 6400.
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