Stihl Ms 250 C Manual

MS 250
English
49
Maintenance and Care
The following information applies under normal operating conditions. The specified intervals must be 
shortened accordingly when working for longer than normal each day or under difficult conditions 
(extensive dust, highly resinous lumber, lumber from tropical 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...

MS 250
English
50
Anti-vibration elementsCheck XX
Have them replaced by a servicing dealer1)X
Air intake on fan housing CleanXX X
Cylinder fins CleanXX
CarburetorCheck idle adjustment – saw chain must not 
rotateXX
Set the idle speed, have the chain saw repaired 
by a servicing dealer
1)X
Spark plugAdjust electrode gapX
Replace after 100 hours of operation
All accessible screws, nuts and bolts (not adjusting 
screws)Tighten
2)X
Spark arresting screen in mufflerHave checked by a specialist dealer
1)X
Have...

MS 250
English
51 1Carburetor Box Cover Twist Lock
2Carburetor Adjusting Screws
3Manual Fuel Pump
1)
4Decompression Valve 
(Automatically Resetting)1)
5Chain Brake
6Muffler
7Chain Sprocket
8Chain Sprocket Cover
9Chain Catcher
10Chain Tensioner
11Guide Bar
12Oilomatic Saw Chain
13Oil Filler Cap
14Bumper Spike
15Front Hand Guard
16Front Handle (Handlebar)
17Starter Grip
18Spark Plug Boot
19Master Control Lever
20Fuel Filler Cap
21Throttle Trigger
22Throttle Trigger Lockout
23Rear Handle
24Rear Hand Guard...

MS 250
English
52
Definitions
1 Carburetor Box Cover Twist Lock
Lock for carburetor box cover.
2 Carburetor Adjusting Screws
For tuning the carburetor.
3 Manual Fuel Pump
Provides additional fuel feed for a 
cold start.
4 Decompression Valve 
(Automatically Resetting)
Releases compression pressure to 
make engine starting easier – when 
activated.
5Chain Brake
A device to stop the rotation of the 
chain. Is activated in a kickback 
situation by the operator's hand or 
by inertia.
6 Muffler
Reduces...

MS 250
English
53
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
Engine
STIHL single cylinder two-stroke engine
MS 250
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with 
integral fuel pump
Chain Lubrication
Fully automatic, speed-controlled oil 
pump with rotary piston
Weight
Cutting...

MS 250
English
54 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...

MS 250
English
55 STIHL Incorporated Limited Warranty 
Policy
This product is sold subject to the STIHL 
Incorporated Limited Warranty Policy, 
available at 
http://www.stihlusa.com/warranty.html.
It can also be obtained from your 
authorized STIHL dealer or by calling 
1-800-GO-STIHL (1-800-467-8445).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...

MS 250
English
56 problem exists. The warranty repairs will 
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 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...

MS 250
English
57 –Clamps
–Fasteners
Where to Make a Claim for Warranty 
Service
Bring the product to any authorized 
STIHL servicing dealer.
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 
regarding quality and mixing ratio of fuel 
and oil may require shorter maintenance 
intervals.
Limitations
This Emission Control Systems...

MS 250
English
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