Stihl 241 Cm Manual

							MS 241 C-M
English
49
Air filterCleanXX
ReplaceX
Anti-vibration elementsCheckXX
Have them replaced by a servicing 
dealer
1)X
Air intake on fan housing CleanXX X
Cylinder fins CleanXX X
CarburetorCheck idle adjustment – saw chain must 
not rotateXX
If the saw chain rotates in idle, have the 
chain saw serviced by a servicing 
dealer
1)X
Spark plugAdjust electrode gapX
Replace after 100 hours of operationX
Accessible screws, nuts and bolts Tighten
2)X
Spark arresting screen in mufflerHave checked by a specialist dealer
1)X
Have cleaned by a specialist dealer, or 
replaced if necessary
1)X
Chain catcherCheckX
ReplaceX
Exhaust boreDecarbonise after 139 hours of opera-
tion, subsequently after every 150 hours 
of operationX
Safety information label ReplaceX
1)STIHL recommends STIHL servicing dealers2)During initial use of chain saws (with a power output of 3.4 kW or more), tighten the cylinder block screws after 10 to 20 hours of operation 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 faulty
If damaged
As required 
						

							MS 241 C-M
English
501Shroud Lock
2Decompression Valve 
(Automatically Resetting)
3Shutter (Summer and Winter 
Operation)
4Chain Brake
5Chain Sprocket
6Chain Sprocket Cover
7Chain Catcher
8Chain Tensioner
9Bumper Spike
10Guide Bar
11Oilomatic Saw Chain
12Oil Filler Cap
13Muffler (with Spark Arresting 
Screen)
14Front Hand Guard
15Front Handle (Handlebar)
16Spark Plug Boot
17Starter Grip
18Fuel Filler Cap
19Master Control Lever
20Throttle Trigger
21Throttle Trigger Lockout
22Rear Handle
23Rear Hand Guard
#Serial Number
Main Parts
18
21
7
3
9
12
131
1
#
2410BA022 KN
14
10
11
5
8
2
1
20
19
1617
15
4
6
23
22 
						

							MS 241 C-M
English
51
Definitions
1 Shroud Lock
Lock for the shroud.
2 Decompression Valve –
(Automatically Resetting)
Releases compression pressure to 
make starting easier – when 
activated.
3Shutter
With summer and winter positions. 
Carburetor is heated in winter 
position.
4Chain Brake
A device to stop the rotation of the 
chain. Is activated in a kickback 
situation by the operator's hand or 
by inertia.
5 Chain Sprocket
The toothed wheel that drives the 
saw chain.
6 Chain Sprocket Cover
Covers the sprocket.
7 Chain Catcher
Helps to reduce the risk of operator 
contact by a chain when it breaks or 
comes off the bar.
8 Chain Tensioner
Permits precise adjustment of chain 
tension.
9Bumper Spike
Toothed stop for holding saw steady 
against wood.
10 Guide Bar
Supports and guides the saw chain.11 Oilomatic Saw Chain
A loop consisting of cutters, tie 
straps and drive links.
12 Oil Filler Cap
For closing the oil tank.
13 Muffler (with Spark Arresting 
Screen)
Muffler reduces engine exhaust 
noise and diverts exhaust gases 
away from operator.
Spark arresting screen is designed 
to reduce the risk of fire.
14 Front Hand Guard
Provides protection against 
projecting branches and helps 
prevent left hand from touching the 
chain if it slips off the handlebar. It 
also serves as the lever for chain 
brake activation.
15 Front Handle (Handlebar)
Handlebar for the left hand at the 
front of the saw.
16 Spark Plug Boot
Connects the spark plug with the 
ignition lead.
17 Starter Grip
The grip of the pull starter, for 
starting the engine.
18 Fuel Filler Cap
For closing the fuel tank.
19 Master Control Lever
Lever for starting, operating and 
stop-engine positions.
20 Throttle Trigger
Controls the speed of the engine.21 Throttle Trigger Lockout
Must be depressed before the 
throttle trigger can be activated.
22 Rear Handle
The support handle for the right 
hand, located at the rear of the saw.
23 Rear Hand Guard
Gives added protection to 
operator's right hand.
Guide Bar Nose
The exposed end of the guide bar. 
(not illustrated, see chapter 
"Tensioning the Saw Chain")
Clutch
Couples engine to chain sprocket 
when engine is accelerated beyond 
idle speed. (not illustrated)
Anti-Vibration System
The anti-vibration system includes a 
number of anti-vibration elements 
designed to reduce the 
transmission of vibrations created 
by the engine and cutting 
attachment to the operator's hands. 
(not illustrated) 
						

							MS 241 C-M
English
52
EPA / CEPA
The Emission Compliance Period 
referred to on the Emissions 
Compliance Label indicates the number 
of operating hours for which the engine 
has been shown to meet Federal 
emission requirements.
Category
CARB
The Emission Compliance Period used 
on the CARB-Air Index Label indicates 
the terms:
Engine
STIHL single cylinder two-stroke engine
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with 
integral fuel pump
Chain Lubrication
Fully automatic, speed-controlled 
reciprocating oil pump. Additional 
manual oil flow control
Weight
Cutting Attachments
Recommended cutting attachments 
conforming with the 45 degree 
computed kickback angle requirement 
of Section 5.11 of 
ANSI/OPEI B175.1-
2012 when used on 
this model chain saw (see the chapter 
on "Safety Precautions and Working 
Techniques"):
Rollomatic E guide bars
Actual cutting length will be less than 
listed bar length.
Saw chain 3/8" P
Chain sprocket
To comply with the 45 degree computed 
kickback angle requirement of Section 
5.11 of ANSI/OPEI B175.1-
2012, use 
replacement saw chains listed above or 
elsewhere by STIHL as conforming with 
that requirement when used on this 
model chain saw or use saw chains Specifications
A = 300 hours
B = 125 hours
C = 50 hours
Extended = 300 hours
Intermediate = 125 hours
Moderate = 50 hoursDisplacement: 2.60 cu.in 
(42.6 cc)
Bore: 1.67 in 
(42.5 mm)
Stroke: 1.18 in (30 mm)
Engine power to 
ISO 7293:3.1 bhp (2.3 kW) 
at 10,500 rpm
Idle speed: 2,800 rpm
Cut-off speed: 14,000 rpm
Spark plug (resistor 
type): NGK CMR6H
Electrode gap: 0.02 in (0.5 mm)
Fuel tank capacity:13.2 fl.oz (0.39 l)
Oil tank capacity: 8.5 fl.oz (0.25 l)
dry, without bar and chain
MS 241 C-M: 9.9 lbs (4.5 kg)Reduced kickback STIHL guide bars 
(with green label)
Bar lengths: 30, 35, 40, 45 cm (112, 
14, 16, 18 in.)
Pitch: 3/8" P (9.32 mm)
Groove width: 1.3 mm (0.050 in)
Sprocket nose: 9-
tooth
Low kickback STIHL saw chain (with 
green label)
Picco Micro 3 (63 PM3) Type 3636
Picco Super 3 (63 PS3) Type 3616
Picco Duro 3 (63 PD3) Type 3612
Pitch: 3/8" P (9.32 mm)
Drive link gauge: 1.3 mm (0.050 in)
6-tooth for 3/8" P (spur sprocket) 
						

							MS 241 C-M
English
53 classified as "low kickback" in 
accordance with 
ANSI/OPEI B175.1-
2012.
Since new bar/chain combinations may 
be developed after publication of this 
Manual, ask your STIHL dealer for the 
latest STIHL recommendations.Please enter your saw model, serial 
number as well as the part numbers of 
the guide bar and saw chain in the 
spaces provided. This will make re-
ordering simpler.
The guide bar and saw chain are subject 
to normal wear and tear. When 
purchasing these parts, always quote 
the saw model, the part numbers and 
names of the parts.
See "Specifications" in this manual for 
the recommended reduced kickback 
cutting attachments.Users of this unit should carry out only 
the maintenance operations described 
in this manual. STIHL recommends that 
other repair work be performed only by 
authorized STIHL servicing dealers.
Warranty claims following repairs can be 
accepted only if the repair has been 
performed by an authorized STIHL 
servicing dealer using genuine STIHL 
replacement parts.
Genuine STIHL parts can be identified 
by the STIHL part number, the 
{ logo and, in some cases, by 
the STIHL parts symbol K. The 
symbol may appear alone on small 
parts.
Ordering Spare Parts
Model
Serial number
Guide bar part number
Chain part number
Maintenance and Repairs 
						

							MS 241 C-M
English
54 Observe all country-specific waste 
disposal rules and regulations.
STIHL products must not be thrown in 
the garbage can. Take the product, 
accessories and packaging to an 
approved disposal site for environment-
friendly recycling.
Contact your STIHL servicing dealer for 
the latest information on waste disposal.
Not for California
Your Warranty Rights and Obligations
The U.S. Environmental Protection 
Agency (EPA) and STIHL Incorporated 
are pleased to explain the Emission 
Control System Warranty on your 
equipment type engine. In the U.S. new 
1997 and later model year small off-road 
equipment engines must be designed, 
built and equipped, at the time of sale, to 
meet the U.S. EPA regulations for small 
non road engines. The equipment 
engine must be free from defects in 
materials and workmanship which 
cause it to fail to conform with U.S. EPA 
standards for the first two years of 
engine use from the date of sale to the 
ultimate purchaser.
STIHL Incorporated must warrant the 
emission control system on your small 
off-road engine for the period of time 
listed below provided there has been no 
abuse, neglect or improper maintenance 
of your small off-road equipment engine.
Your emission control system includes 
parts such as the carburetor and the 
ignition system. Also included may be 
hoses, and connectors and other 
emission-related assemblies.
Where a warrantable condition exists, 
STIHL Incorporated will repair your 
small off-road equipment engine at no 
cost to you, including diagnosis (if the 
diagnostic work is performed at an 
authorized dealer), parts, and labor.Manufacturer's Warranty Coverage
In the U.S., 1997 and later model year 
small off-road equipment engines are 
w a r r a n t e d  f o r  t w o  y e a r s .  I f  a n y  e m i s s i o n -
related part on your engine is defective, 
the part will be repaired or replaced by 
STIHL Incorporated free of charge.
Owner's Warranty Responsibilities
As the small off-road equipment engine 
owner, you are responsible for the 
performance of the required 
maintenance listed in your instruction 
manual. STIHL Incorporated 
recommends that you retain all receipts 
covering maintenance on your small off-
road equipment engine, but STIHL 
Incorporated cannot deny warranty 
solely for the lack of receipts or for your 
failure to ensure the performance of all 
scheduled maintenance.
Any replacement part or service that is 
equivalent in performance and durability 
may be used in non-warranty 
maintenance or repairs, and shall not 
reduce the warranty obligations of the 
engine manufacturer.
As the small off-road equipment engine 
owner, you should be aware, however, 
that STIHL Incorporated may deny you 
warranty coverage if your small off-road 
equipment engine or a part has failed 
due to abuse, neglect, improper 
maintenance or unapproved 
modifications.
You are responsible for presenting your 
small off-road equipment engine to a 
STIHL service center as soon as a 
problem exists. The warranty repairs will 
be completed in a reasonable amount of 
time, not to exceed 30 days.
Disposal
000BA073 KN
67,+/,QFRUSRUDWHG)HGHUDO
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							MS 241 C-M
English
55 If you have any questions regarding your 
warranty rights and responsibilities, 
please contact a STIHL customer 
service representative at 1-800-467-
8445 or you can write to
STIHL Inc.,
536 Viking Drive, P.O. Box 2015,
Virginia Beach, VA 23450-2015
www.stihlusa.com
Coverage by STIHL Incorporated
STIHL Incorporated warrants to the 
ultimate purchaser and each 
subsequent purchaser that your small 
off-road equipment engine will be 
designed, built and equipped, at the time 
of sale, to meet all applicable 
regulations. STIHL Incorporated also 
warrants to the initial purchaser and 
each subsequent purchaser that your 
engine is free from defects in materials 
and workmanship which cause the 
engine to fail to conform with applicable 
regulations for a period of two years.
Warranty Period
The warranty period will begin on the 
date the utility equipment engine is 
purchased by the initial purchaser and 
you have signed and sent back the 
warranty card to STIHL.
If any emission-related part on your 
engine is defective, the part will be 
replaced by STIHL Incorporated at no 
cost to the owner. Any warranted part 
which is not scheduled for replacement 
as required maintenance, or which is 
scheduled only for regular inspection to 
the effect of "repair or replace as 
necessary" will be warranted for the 
warranty period. Any warranted part 
which is scheduled for replacement as required maintenance will be warranted 
for the period of time up to the first 
scheduled replacement point for that 
part.
Diagnosis
You, as the owner, shall not be charged 
for diagnostic labor which leads to the 
determination that a warranted part is 
defective. However, if you claim 
warranty for a component and the 
machine is tested as non-defective, 
STIHL Incorporated will charge you for 
the cost of the emission test. Mechanical 
diagnostic work will be performed at an 
authorized STIHL servicing dealer. 
Emission test may be performed either 
at STIHL Incorporated or at any 
independent test laboratory.
Warranty Work
STIHL Incorporated shall remedy 
warranty defects at any authorized 
STIHL servicing dealer or warranty 
station. Any such work shall be free of 
charge to the owner if it is determined 
that a warranted part is defective.
Any manufacturer-approved or 
equivalent replacement part may be 
used for any warranty maintenance or 
repairs on emission-related parts and 
must be provided without charge to the 
owner. STIHL Incorporated is liable for 
damages to other engine components 
caused by the failure of a warranted part 
still under warranty.
The following list specifically defines the 
emission-related warranted parts:
–Air Filter
–Carburetor (if applicable)
–Fuel Pump–Choke (Cold Start Enrichment 
System) (if applicable)
–Control Linkages
–Intake Manifold
–
Magneto or Electronic Ignition 
System (Ignition Module or 
Electronic Control Unit)
–Fly Wheel
–Spark Plug
–Injection Valve (if applicable)
–Injection Pump (if applicable)
–Throttle Housing (if applicable)
–Cylinder
–Muffler
–Catalytic Converter (if applicable)
–Fuel Tank
–Fuel Cap
–Fuel Line
–Fuel Line Fittings
–Clamps
–Fasteners
Where to make a Claim for Warranty 
Service
Bring the product to any authorized 
STIHL servicing dealer and present the 
signed warranty card.
Maintenance Requirements
The maintenance instructions in this 
manual are based on the application of 
the recommended 2-stroke fuel-oil 
mixture (see also instruction "Fuel"). 
Deviations from this recommendation  
						

							MS 241 C-M
English
56 regarding quality and mixing ratio of fuel 
and oil may require shorter maintenance 
intervals.
Limitations
This Emission Control Systems 
Warranty shall not cover any of the 
following:
Nrepair or replacement required 
because of misuse, neglect or lack 
of required maintenance,
Nrepairs improperly performed or 
replacements not conforming to 
STIHL Incorporated specifications 
that adversely affect performance 
and/or durability, and alterations or 
modifications not recommended or 
approved in writing by STIHL 
Incorporated,
and
Nreplacement of parts and other 
services and adjustments 
necessary for required maintenance 
at and after the first scheduled 
replacement point.
For California only
Your Warranty Rights and Obligations
The California Air Resources Board 
(CARB) and STIHL Incorporated are 
pleased to explain the emission control 
system warranty on your 2014 and later 
small off-road equipment engine.
In California, new equipment that uses 
small off-road engines must be 
designed, built, and equipped to meet 
the State's stringent anti-smog 
standards. STIHL Incorporated must 
warrant the emissions control system on 
your small off-road engine for the period 
listed below provided there has been no 
abuse, neglect or improper maintenance 
of your small off-road engine.
Your emissions control system may 
include parts such as the carburetor or 
fuel-injection system, the ignition 
system, and catalytic converter. Also 
included may be hoses, belts, 
connectors or other emission-related 
assemblies.
Where a warrantable condition exists, 
STIHL Incorporated will repair your 
small off-road equipment engine at no 
cost to you including diagnosis, parts 
and labor.Manufacturer’s Warranty 
Responsibilities
This emissions control system is 
warranted for two years in California. If 
any emissions-related part on your 
equipment is defective, the part will be 
repaired or replaced by STIHL 
Incorporated free of charge.
Owner’s Warranty Responsibilities
As the small off-road equipment engine 
owner, you are responsible for 
performance of the required 
maintenance listed in your instruction 
manual. STIHL Incorporated 
recommends that you retain all receipts 
covering maintenance on your small off-
road equipment engine, but STIHL 
Incorporated cannot deny warranty 
solely for the lack of receipts or your 
failure to ensure the performance of all 
scheduled maintenance.
As the small off-road equipment engine 
owner, you should however be aware 
that STIHL Incorporated may deny you 
warranty coverage if your small off-road 
equipment engine or a part has failed 
due to abuse, neglect, or improper 
maintenance or unapproved 
modifications.
You are responsible for presenting your 
small off-road equipment engine to a 
STIHL servicing dealer as soon as the 
problem exists. The warranty repairs 
should be completed in a reasonable 
amount of time, not to exceed 30 days. If 
you have any questions regarding your 
warranty rights and responsibilities, 
please contact a STIHL customer 
service representative at 1-800-467-
8445 or you can write to
STIHL Incorporated 
California Exhaust and 
Evaporative Emissions 
Control Warranty Statement 
						

							MS 241 C-M
English
57 STIHL Inc., 536 Viking Drive,
P.O. Box 2015,
Virginia Beach, VA 23450-2015.
www.stihlusa.com
Coverage by STIHL Incorporated
STIHL Incorporated warrants to the 
ultimate purchaser and each 
subsequent purchaser that your small 
off-road equipment engine is designed, 
built and equipped, at the time of sale, to 
meet all applicable emission 
regulations.
STIHL Incorporated also warrants to the 
initial purchaser and each subsequent 
purchaser that your engine is free from 
defects in materials and workmanship 
which cause the engine to fail to conform 
to applicable emission regulations for a 
period of two years.
Defects Warranty Period
The warranty periods will begin on the 
date the utility equipment engine is 
purchased by the initial purchaser. If any 
emission-related part on your engine is 
defective, the part will be replaced by 
STIHL Incorporated at no cost to the 
owner.
Add-on or modified parts that are not 
exempted by CARB may not be used. 
The use of any non-exempted add-on or 
modified parts will be grounds for 
disallowing a warranty claim. STIHL 
Incorporated will not be liable to warrant 
failures of warranted parts caused by the 
use of a non-exempted add-on or 
modified part.The warranty on emissions-related parts 
will be interpreted as follows:
1.Any warranted part that is not 
scheduled for replacement as 
required maintenance in the written 
instructions required in the 
Emission Warranty Parts List (see 
below) must be warranted for the 
warranty period defined in 
Subsection COVERAGE BY STIHL 
INCORPORATED, see above. If 
any such part fails during the period 
of warranty coverage, it must be 
repaired or replaced by the 
manufacturer according to 
Subsection (4) below. Any such part 
repaired or replaced under the 
warranty must be warranted for the 
remaining warranty period.
2.Any warranted part that is 
scheduled only for regular 
inspection in the written instructions 
required by the Emission Warranty 
Parts List (see below) must be 
warranted for the warranty period 
defined in Subsection COVERAGE 
BY STIHL INCORPORATED, see 
above. A statement in such written 
instructions to the effect of "repair or 
replace as necessary" will not 
reduce the period of warranty 
coverage. Any such part repaired or 
replaced under warranty must be 
warranted for the remaining 
warranty period.
3.Any warranted part that is 
scheduled for replacement as 
required maintenance in the written 
instructions required by the 
Emission Warranty Parts List (see 
below) must be warranted for the 
period of time prior to the first 
scheduled replacement point for that part. If the part fails prior to the 
first scheduled replacement, the 
part must be repaired or replaced by 
the engine manufacturer according 
to Subsection (4) below. Any such 
part repaired or replaced under 
warranty must be warranted for the 
remainder of the period prior to the 
first scheduled replacement point 
for the part.
4.Repair or replacement of any 
warranted part under the warranty 
must be performed at a warranty 
station at no charge to the owner.
5.Notwithstanding the provisions of 
Subsection (4) above, warranty 
services or repairs will be provided 
at all manufacturer distribution 
centers that are authorized to 
service the subject engines.
6.The owner must not be charged for 
diagnostic labor that leads to the 
determination that a warranted part 
is in fact defective, provided that 
such diagnostic work is performed 
at a warranty station.
Warranty Work
STIHL Incorporated shall remedy 
warranty defects at any authorized 
STIHL servicing dealer or warranty 
station. Any such work shall be free of 
charge to the owner if it is determined 
that a warranted part is defective. Any 
manufacturer approved or equivalent 
replacement part may be used for any 
warranty maintenance or repairs on 
emission-related parts and must be 
provided without charge to the owner. 
STIHL Incorporated is liable for  
						

							MS 241 C-M
English
58 damages to other engine components 
caused by the failure of a warranted part 
still under warranty.
Emission Warranty Parts List
Air Filter, Carburetor (if applicable), Fuel 
Pump, Choke (Cold Start Enrichment 
System) (if applicable), Control 
Linkages, Intake Manifold, Magneto or 
Electronic Ignition System (Ignition 
Module or Electronic Control Unit), Fly 
Wheel, Spark Plug, Injection Valve (if 
applicable), Injection Pump (if 
applicable), Throttle Housing (if 
applicable), Cylinder, Muffler, Catalytic 
Converter (if applicable), Fuel Tank, 
Fuel Cap, Fuel Line, Fuel Line Fittings, 
Clamps, Fasteners.
Where to make a Claim for Warranty 
Service
Bring the STIHL product to any 
authorized STIHL servicing dealer and 
present the signed STIHL product 
registration card, or the print-out of the 
electronic product registration.
Limitations
The repair or replacement of any 
warranted part otherwise eligible for 
warranty coverage may be excluded 
from such warranty coverage if STIHL 
Incorporated demonstrates that the 
STIHL product has been abused, 
neglected, or improperly maintained, 
and that such abuse, neglect, or 
improper maintenance was the direct 
cause of the need for repair or 
replacement of the part. That 
notwithstanding, any adjustment of a 
component that has a factory installed, and properly operating, adjustment 
limiting device is still eligible for warranty 
coverage.
STIHL Registered Trademarks
STIHL
®
{
K
The color combination orange-grey 
(U.S. Registrations #2,821,860; 
#3,010,057, #3,010,058, #3,400,477; 
and #3,400,476)
AutoCut
®
EASYSTART®
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