Stihl 241 Cm Manual

MS 241 C-M
English
39 If groove depth is less than specified:
NReplace the guide bar.
The drive link tangs will otherwise 
scrape along the bottom of the groove – 
the cutters and tie straps will not ride on 
the bar rails.
Removing the shroud
NMove the Master Control lever to the 
stop position (0).
NPush the hand guard forward – the 
chain is locked.
NOpen the twist locks (1) by turning 
them 1/4 turn counterclockwise with 
the combination wrench. 
NRemove the shroud (2).
Installing the shroud
NPlace...

MS 241 C-M
English
40 Thorough filter cleaning
NWash the filter in STIHL special-
purpose cleaner (special 
accessory) or a clean, non-
flammable cleaning liquid (e. g., 
warm soapy water) – rinse the filter 
from inside to out under a water jet 
– do not use high-pressure cleaners
NDry all filter parts – do not expose to 
extreme heat
NDo not oil the filter
NReinstall filter
Installing the air filter
NFit air filter 
NPress the air filter in the direction of 
the filter housing and 
simultaneously turn...

MS 241 C-M
English
41 NIf engine performance deteriorates, 
check the spark arresting screen in 
the muffler
NLet the muffler cool down
NUnscrew the screw (1)
NPull out spark arresting screen (2)
NClean the dirty spark arresting 
screen, replace if damaged or 
heavily carbonized
NRefit the spark arresting screen
NFit screw
Removing the spark plug
NRemove the shroud – see "Shroud"
NPull off the spark plug boot
NUnscrew spark plug
Checking the Spark Plug
NClean dirty spark plug.
NCheck electrode...

MS 241 C-M
English
42
Installing the spark plug
NFit spark plug by hand
NTighten the spark plug and press on 
the spark plug boot firmly
NFit the shroud – see "Shroud"
If engine is down on power, difficult to 
start or runs poorly at idling speed, first 
check the spark plug.
Fit a new spark plug after approx. 100 
operating hours or earlier if the 
electrodes are badly eroded.
Wrong fuel mix (too much engine oil in 
the gasoline), a dirty air filter and 
unfavorable running conditions (mostly...

MS 241 C-M
English
43 NRemove chain sprocket cover, saw 
chain and guide bar.
NRelease chain brake – pull hand 
guard against the front handle
Fit new chain sprocket
–after use of two saw chains or 
earlier
–if the wear marks (arrows) are 
deeper than 0.02 in (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.
Use only STIHL original chain sprockets 
to help ensure...

MS 241 C-M
English
44 Sawing 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 
– this leads to increased physical strain, 
increased vibration load, unsatisfactory 
cutting results and increased wear.
NClean the saw chain
NCheck the saw chain for cracks and 
damaged rivets
NReplace damaged or worn chain 
components and adapt these parts 
to the remaining parts in terms of...

MS 241 C-M
English
45
File holder
NUse a file holder
Always use a file holder (special 
accessory, see table "Sharpening tools") 
when sharpening saw chains by hand. 
File holders have markings for the 
sharpening angle.
Use only special saw chain files! Other 
files are unsuitable in terms of shape 
and type of cutting.
To check the angles
STIHL filing gauge (special accessory, 
see table "Sharpening tools") – a 
universal tool for checking sharpening 
and side plate angles, depth gauge...

MS 241 C-M
English
46 aRequired distance between depth 
gauge and cutting edge
When cutting softwood outside of the 
frost season, the distance can be 
increased by up to 0.2 mm (0.008").
Lowering the depth gauges
The depth gauge setting is lowered 
when the cutter is sharpened.
NCheck the depth gauge setting after 
each sharpening
NLay the appropriate file gauge (1) 
for the chain pitch on the saw chain 
and press it against the cutter to be 
checked – if the depth gauge 
protrudes past the file...

MS 241 C-M
English
47 Sharpening tools (special accessories)
Chain pitch Round file ^Round file File holder File gaugeTaper square file Sharpening set 
1)
Inches (mm) mm (Inches) Part number Part number Part number Part number Part number
1/4 P (6.35) 3.2 (1/8) 5605 771 32065605 750 4300 0000 893 4005 0814 252 3356 5605 007 1000
1/4 (6.35) 4.0 (5/32) 5605 772 40065605 750 4327 1110 893 4000 0814 252 3356 5605 007 1027
3/8 P (9.32) 4.0 (5/32) 5605 772 4006 5605 750 4327 1110 893 4000 0814 252 3356 5605...

MS 241 C-M
English
48
Maintenance and Care
The following information applies in normal operating conditions. The specified inter-
vals must be shortened accordingly when working for longer than normal or under 
difficult cutting conditions (extensive dust, highly resinous lumber, lumber from trop-
ical trees, etc.). If the machine is only used occasionally, the intervals can be 
extended accordingly.
Before starting work
At the end of work and/or 
daily
Whenever tank is refilled
Weekly
Monthly
Yearly
If...