Stihl 201 Tcm Manual

MS 201 TC-M
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19
Disengaging the Chain Brake
NPull the hand guard towards the 
front handle until there is an audible 
click – the chain brake is 
disengaged.
NOTICE
Always disengage chain brake before 
accelerating the engine (except when 
checking its operation) and before 
starting cutting work.
High revs with the chain brake engaged 
(chain locked) will quickly damage the 
powerhead and chain drive (clutch, 
chain brake).
The chain brake is also activated by the 
inertia of the front hand guard...

MS 201 TC-M
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20
Positions of Master Control Lever
STOP or † – Master Control lever must 
be pushed in direction of STOP or † to 
switch off ignition. The Master Control 
lever springs back to the run positionF 
when it is released.
WARNING
The ignition is switched on again 
automatically after the engine stops. 
Engine can be started by operating the 
rewind starter.
Run positionF – a hot engine is started 
in this position or the engine runs in this 
position.
Start position} – a cold engine is...

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21
Cranking
NPull the starter grip slowly with your 
left hand until you feel it engage – 
and then give it a brisk strong pull 
and push down the front handle at 
the same time. Do not pull out the 
starter rope to full length – it might 
otherwise break. Do not let the 
starter grip snap back. Guide it 
slowly back into the housing so that 
the starter rope can rewind properly.
Machines without additional manual fuel 
pump: If the engine is new or after a long 
out-of-service...

MS 201 TC-M
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22 NPull the hand guard back towards 
the front handle.
The chain brake is now disengaged – 
your saw is ready for operation.
NOTICE
Always disengage chain brake before 
accelerating the engine. High revs with 
the chain brake engaged (chain locked) 
will quickly damage the clutch and chain 
brake.
At very low outside temperatures
NChange over to winter operation if 
necessary – see “Winter Operation”.
Stopping the Engine
NMove the Master Control lever in the 
direction of STOP or † –...

MS 201 TC-M
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23 Chain at operating temperature
The chain stretches and begins to sag. 
The drive links must not come out of the 
bar groove on the underside of the bar – 
the chain may otherwise jump off the 
bar. Retension the chain – see 
"Tensioning the Saw Chain".
NOTICE
The chain contracts as it cools down. If it 
is not slackened off, it can damage the 
crankshaft and bearings.
After a long period of full-throttle 
operation
After a long period of full-throttle 
operation, allow...

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24 NFlip the bar – after each sharpening 
and each time the chain is changed 
– to avoid uneven wear, especially 
at the sprocket nose and on the 
bottom
NPeriodically clean the oil inlet 
hole (1), oil outlet channel (2) and 
bar groove (3)
NMeasure groove depth – using the 
measuring tool on the file gauge 
(special accessory) – in the area 
with the greatest wearIf the groove is not at least this deep:
NReplace guide bar
Otherwise the drive links will grind 
against the base of the...

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Basic information
M-Tronic regulates the fuel quantity and 
ignition timing for all operating states 
electronically.
M-Tronic stands for easy, fast starting, 
constant optimum engine performance, 
outstanding acceleration and automatic 
adaptation to changes in operating 
conditions.
Manual carburetor adjustments are no 
longer required – the carburetor does 
not have any adjusting screws.
Automatic adjustment
Under extremely changed operating 
conditions, attainment of the...

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26
Checking the Spark Plug
NClean dirty spark plug.
NCheck electrode gap (A) and 
readjust if necessary – see 
"Specifications".
NRectify the problems which have 
caused fouling of the spark plug.
Possible causes are:
–Too much oil in fuel mix.
–Dirty air filter.
–Unfavorable running conditions.
WARNING
Arcing may occur if the adapter nut (1) is 
loose or missing. Working in an easily 
combustible or explosive atmosphere 
may cause a fire or an explosion. This 
can result...

MS 201 TC-M
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27 NRemove chain sprocket cover, saw 
chain and guide bar
NRelease chain brake – pull hand 
guard against the front handle
Fitting a new chain sprocket
–after use of two saw chains or 
earlier
–if the wear marks (arrows) are 
deeper than 0.5 mm – otherwise the 
service life of the saw chain is 
reduced – use check gauge (special 
accessory) to test
Using two saw chains in alternation 
helps preserve the chain sprocket.
For the removal and installation of chain 
sprocket and clutch...

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28
Assembly
NFit needle cage and chain sprocket 
on the crankshaft
NScrew the clutch counterclockwise 
onto the crankshaft
NTighten the clutch with a torque of 
25 Nm
NRemove the locking strip from the 
cylinder, screw in and tighten the 
spark plug
NPush the spark plug boot onto the 
spark plugSawing effortlessly with a properly 
sharpened saw chain
A properly sharpened saw chain cuts 
through wood effortlessly even with very 
little pushing.
Never use a dull or damaged saw chain 
–...