Stihl MS 362 C-M Manual

STIH)
Technical Information
TI_04_2013_30_01_01.fm englisch / English
New STIHL MS 362 C-M Chain Saw
Contents
1. Components
2. Starting / Stopping the Engine
2.1 Positions of Master Control Lever™
2.2 Setting the Master Control Lever™
3. Specifications
4. Repairs
4.1 Troubleshooting
4.2 Control Unit
4.3 Wiring Harness
4.4 Switch Unit
4.5 Serial Number
4.6 Tightening Torques
4.7 Repair Times
04.2013

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STIHL M-Tronic™
The STIHL MS 362 C-M is the latest professional
chain saw to be equipped with the all-electronic
STIHL M-Tronic™ engine management system. It
adjustsignition timing andmeterstheexactquantity
of fuel electronically as a function of external
conditions.
The MS 362 C-M is the first STIHL saw to feature a
Master Control Lever™ with a stop switch function.
When the Master Control Lever™ is released and
the engine stops, the ignition is automatically
switched on again and thus simplifies the next
start.
The new STIHL MS 362 C-M is also available in the
following version:
– MS 362 C-MQ with STIHL Quickstop®Plus
chain brake
Benefits
– Simplified starting
– Optimum engine performance at all times
– Very good acceleration
– Automatic carburetor adjustment
– Memory function
– MasterControlLever™withstopswitchfunction

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1. Components
Control unit (1)
Control center for the optimum adjustment of fuel
flow, the exact ignition timing and the memory
function.
Second pair of poles (2)
Supplies power to control unit and solenoid valve.
Wiring harness (3)
Connects control unit, solenoid valve, microswitch
and diagnostic jack.
Master Control Lever™ with stop switch
function (4)
EngineisshutdownbyoperatingtheMasterControl
Lever™.Whentheenginestops,theMasterControl
Lever™ springs back to the normal run position F.
Ignition is automatically switched on again in this
position.
Solenoid valve (5)
Electronically controlled solenoid valve meters fuel
in milliseconds – this allows a fuel flow rate between
0% and 100%.
Switch unit (6)
Identifies position of choke shutter – recognizes
start status
Diagnostic jack (7)
Connection for STIHL MDG 1 engine analyzer.
1
5902TI032 KN
2
3
4
6
5
5902TI033 KN
7

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2. Starting / Stopping the Engine
Because of the new Master Control Lever™ with
stop switch function, it is no longer necessary to
check its position when restarting the engine.
2.1 Positions of Master Control Lever™
STOP or †– Master Control Lever™ must be
pushed in direction of STOP or †to switch off
ignition.TheMasterControlLever™springsbackto
the normal run position Fwhen it is released.
The ignition is switched on again automatically after
the engine stops. The engine can start at any time if
the rewind starter is operated.
Run position F– engine runs or can start.
Start }– the engine is started in this position.
2.2 Setting the Master Control Lever™
To move the Master Control Lever™ from the run
position Fto start }, press down the trigger lockout
and squeeze the throttle trigger at the same time
and hold them in that position – move Master
Control Lever™ to start }and let go of the throttle
trigger and trigger lockout.
When the trigger lockout is depressed and the
throttle trigger pulled, the Master Control Lever™
automatically returns to the run position F..
Toshutofftheengine, moveMasterControlLever™
in direction of STOP or †– when released, the
Master Control Lever™ returns to the run position F.
STOP
5902TI034 KN

:
:
:

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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 alwaysswitched 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
quicklyandreliably.Todothis,followthestepsinthe
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.
Thewiringharnessis securedtothecontrolunitwith
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.
2
3
1
4
5902TI038 KN
3
5902TI040 KN

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.Fit the screws (3) and tighten to 35 lbf. in
(4.0 Nm). Note position of cable lug (5) –
crimped side must be visible and locate against
the guide rib (arrow).
.Push the connector housing (2) onto control
unit's contacts (4) until it snaps into position.
.Tighten screw (1) carefully to 4 lbf. in (0.5 Nm).
.Push the ignition lead (6) into the guides
(arrows) on top of the wiring harness.
.Fit the spark plug boot.
.Assemble all other parts.
4.3 Wiring Harness
4.3.1 Removing the Wiring Harness
.Remove the air filter.
.Pull connector (1) out of connector housing (2)
on filter base.
.Press down the locking tab (arrow) to separate
the connector.
.Pry the choke rod off the switch shaft.
.Remove the switch shaft and then pull the black
short circuit wire off the shaft.
.Remove the baffle and filter base.
.Pry the contact spring off the filter base and pull
the yellow ground wire connector off the contact
spring.
.Push the grommet with wiring harness in the
direction of the fanwheel and out of the
crankcase.
.Disconnect the wiring harness from the control
unit – see b4.2.1
4.3.2 Installing the Wiring Harness
.Push the grommet with wiring harness through
the crankcase – use STIHL press fluid if
necessary.
3
5
3
5902TI041 KN
2
1
4
5902TI058 KN
5902TI042 KN
6
2
5902TI043 KN
1

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.Fit yellow ground wire connector (3) onto the
contact spring terminal (4) and push them both
onto the filter base.
.Install the carburetor and filter base.
.Position black short circuit wire connector in the
switch shaft's guides and push it onto the boss
– crimped side must face up.
.Fit the baffle.
.Fit the switch shaft on the filter base.
.Fit the choke rod.
.Join the connector (1) and push it into the
connector housing (2).
Installation at fanwheel side
.Position wires with shrink tube so that the lower
end of the shrink tube (5) is aligned with the
lower guides (arrow).
.Push the yellow (6) and red (7) solenoid valve
wires into the guides on the crankcase.
.Push the black short circuit wire (8) and the
green/yellow ground wire (9) into the
guides (arrow).
.Install the control unit – see b4.2.2
.Assemble all other parts.
3
4
5902TI044 KN
2
5902TI045 KN
1
5902TI046 KN
5
5902TI047 KN
8
9
76

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4.4 Switch Unit
4.4.1 Removing the Switch Unit
.Remove the shroud, air filter and baffle.
.Swing the filter base forward in direction of
handle.
.Loosen the screw (1) and pull away the switch
unit (2).
.Remove the connector (3) upwards.
.Press down the locking tab (arrow) and
separate the connector.
4.4.2 Installing the Switch Unit
.Push the switch unit (2) onto the carburetor.
.Tighten screw (1) carefully to 9.0 lbf. in
(1.0 Nm).
.Fit the connector (3) and the close the
connector (arrow).
.Assemble all other parts.
4.5 Serial Number
The serial number is located on the side of the
crankcase.
5902TI050 KN
1
2
3
5902TI051 KN
5902TI052 KN
1
2
3
0001TI007 KN

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4.6 Tightening Torques
All other tightening torques remain as before and
are listed in the STIHL MS 362 service manual.
1
1
5902TI054 KN
3
2
Item Fastener Thread size Component(s) Torque Qty. Remarks
1 Screw M4x20 Control unit / crankcase 35 lbf in
(4.0 Nm) 21)
2 Screw M3x8 Wiring harness / control unit /
clamp 4.0 lbf in (0.5 Nm) 1
3 Screw M2.5x16 Switch unit / carburetor 9.0 lbf in
(1.0 Nm) 1
Remark
1) Coat micro-encapsulated screws with medium strength Loctite 243 before reinstalling.

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4.7 Repair Times
The specified repair times assume that the work is
performed by trained personnel in a properly
equipped service workshop.
© ANDREAS STIHL AG & Co. KG, 2013
Repair times are quoted in minutes.
Code Type of Repair MS 362 C-M
1Replace crankcase, crankcase gasket or re-seal crankcase.
Includes air leak test. 120
2Replace engine housing or
cylinder shroud. 15
3Replace crankshaft main bearing(s). Includes air leak
test. 110
4Replace crankshaft seal(s).
Includes air leak test. 50
5 Replace tank filler cap. 6
6Replace cylinder and/or piston. Includes air leak test and repair
of components causing failure. 60
7Replace ignition module or flywheel. Includes stop circuit
test. 30
8Replace fuel tank line, tank
vent, or fuel pick-up body. 25
9Replace intake manifold or intake flange, including leak
test. 30
10 Repair or replace carburetor.
Includes fuel system testing. 35
11 Replace fuel tank housing. 25
12 Replace oil pick-up/delivery
line. Includes oil output test. 30
13 Replace oil pump and/or drive
gear. Includes oil output test. 30
15 Repair or replace rewind starter. 20
16 Repair or replace clutch, clutch
shoes or clutch springs. 20
17 Repair chain brake, including
check for proper function. 35
18 Replace muffler. 15
19 Replace air filter or filter
housing 15
22 Repair or replace stop switch.
Includes circuit testing. 20
25 Replace front handle. 15
26 Replace solenoid valve or M- Tronic wiring. Includes
diagnostic and function tests. 40
35 Engine diagnosis only to determine failures requiring unit
replacement. 25
40 Miscellaneous repairsandother
repairs not listed. 15
45 Handling allowance only-no
labor. 5
50 No labor. 0