Technical Information · issue 32 of 2004
STIHL MS 230 C, MS 250 C with ErgoStart; Starting the chainsaw; Carburetor; Ignition module; Cable harness; Engine housing; Handlebar; Service note; Spare parts; Summary
IssueTI 32/2004
Engine family 1123
Full text
Page 1 of 5
STIH)
Technical Information 32.2004
Chainsaws STIHL MS 210 C, MS 250 C – Series 1123
Contents
1. STIHL MS 250 C with Easy2Start
2. Starting the chainsaw
3. Carburetor
4. Ignition module
5. Cable harness
6. Engine housing
7. Handlebar
8. Service note
9. Spare parts
10. Summary
1. STIHL MS 250 C with Easy2Start 1.1 Functioning
As with the MS 210 C, an additional new version of
the MS 250 C is now available with Easy2Start to F1
2
make starting considerably more convenient. A
helical spring stores the energy when pulling on the 3
starter rope and transmits it to the engine via a
driver. 4 F2
This yields the following advantages for the user:
5
. Low starting speed:
The speed required to pull the starter rope is 1
208TI016 KN
reduced by approx. 60%
. Less effort:
The maximum effort required to start the engine A spring housing (1) with spring (2) and a driver (3)
is reduced by approx. 50% are installed between the rope rotor and
. Individual peak forces due to compression are flywheel (4).
no longer felt on the starter grip
Easy2Start cannot be retrofitted in previous model
MS 250 chainsaws.
TI_32_2004_30_01_01.fm englisch / English USA
)m~ge 2 Technical Information 32.2004
When the starter rope is pulled, force F1 tensions A freewheel in the spring housing prevents the
the spring (2) against the opposing force F2 built up spring housing turning back and releasing the
by the piston (5) during compression. spring.
If the torque of the pretensioned spring is greater In this way, the spring can be tensioned in several
than the resultant torque of force F2, the crankshaft short starting strokes.
will turn over and the engine is started.
1.2 Mechanical design of the starter
mechanism with Easy2Start
1 = Fan housing 12 = Washer
2 = Shaft 13 = Spring housing with spring
3 = Segment 14 = Spring (not available separately as a
4 = Handle spare part)
5 = Starter rope 36 in (910 mm) 15 = Driver
6 = Name plate 16 = Washer
7 = Rewind spring 17 = Circlip DIN 471-8 x 0.8
8 = Rope rotor 18 = Pawl with torsion spring and e-clip
9 = Pawl 19 = Flywheel
10= Washer
11= Spring
TI_32_2004_30_01_01.fm Page 2 of 5
Technical Information 32.2004 Page 3
1.3 Starting effort 1.5.2 Dimensions
The effort required to start the engine is reduced, by
approx. 50%.
24 mm
Individual peak forces due to the compression are
not transmitted to the starter grip.
a = MS 250 standard
b = MS 250 C Easy2Start
Vertical axis: starting effort
Horizontal axis: pulled length of the starter rope
208TI019 KN
(N)
The overall width of the version with Easy2Start is
increased by just under 1 in (24 mm).
a
b
2. Starting the chainsaw
The specific national safety regulations and the
208TI017 KN
0 safety instructions in the user's manual must be
0 1 2 3 4
observed when starting the chainsaw.
The MS 250 C with Easy2Start can be started in
different ways.
1.4 Equipment features The user must decide which is the best method for
The new MS 250 C features the following him or her personally.
equipment: . Slowly and evenly pull the starter grip through
. Easy2Start with the right hand –
. Manual fuel pump . Pull the starter grip in several short strokes
with the right hand, ensuring that the rope is only
. Quick Chain Adjuster (QCA) pulled out a short distance with each pull
The spring accumulator of the Easy2Start stores the
energy for starting the chainsaw. For this reason, a
1.5 Specifications few seconds may pass between pulling the starter
The specifications for the new version are the same rope and starting of the engine (although less than
as for the previous version, except for the weight 1 second is typically needed). The customer's
and dimensions. attention should be drawn to this fact.
The following safety instructions in the user's
1.5.1 Weight manual must be particularly highlighted in
The MS 250 C with Easy2Start is approx. 0.6 lb conjunction with the chainsaw with Easy2Start:
(270 g) heavier. . Keep children at a distance – even very young
MS 250 C with Easy2Start 10.8 lb (4.9 kg) children could start the machine
. Hold the chainsaw firmly by the handlebar
throughout the entire starting process –
remember the delay between pulling the starter
rope and starting of the engine
TI_32_2004_30_01_01.fm
)m~ge 4 Technical Information 32.2004
. To help prevent the engine starting 7. Handlebar
unintentionally when the saw is not in use,
always move the Master Control Lever™ to the Due to the wider starter mechanism, a wider
stop position and engage the chain brake. handlebar is used in order to maintain the correct
Protect the machine from unauthorized use distance between starter mechanism and
(e.g. by children). handlebar.
Handlebar 1123 791 1701 is installed in the
MS 250 C with Easy2Start. This handlebar is
already used in the MS 210 C with Easy2Start.
3. Carburetor
A new carburetor is used in order to adapt to the
special starting conditions in machines with
Easy2Start.
8. Service note
Carburetor C1Q-S92, part no. 1123 120 0620, is The specific national safety regulations and the
installed in the MS 250 C with Easy2Start. safety instructions in the user's manual must be
This carburetor has a limiter cap on the high speed observed if the chainsaw is started in the course of
adjusting screw H. servicing and repairs.
The setting procedure is identical with that of the Spring accumulator
previous machines with carburetor with limiter caps. The spring of the Easy2Start stores the energy over
a long period of time.
The tensioned spring may cause bodily injury or
damage to property when it is dismantled. For this
4. Ignition module reason, the spring must always be relaxed before
Ignition module 1123 400 1301 is used in the starting any maintenance or repair work.
MS 250 C with Easy2Start in order to adapt to the To relax the spring:
special starting conditions.
. Set the Master Control Lever™ to the stop
This ignition module is already used in the position 0
MS 210 C with Easy2Start.
. Pull the starter rope until the engine turns over –
then guide the starter rope back into place and
stop pulling it
5. Cable harness
Due to the geometrical changes, cable harness
1123 440 3002, already used in the MS 210 C with 9. Spare parts
Easy2Start, is also used in the MS 250 C with
Easy2Start. The wires in this cable harness are To standardize the spare parts, in the MS 210 C with
longer. Easy2Start the fan housing 1123 080 1808 is
replaced as a spare part by the new fan housing
1123 080 1809, which is made of die cast
magnesium.
6. Engine housing The fan housing with starter mechanism
1123 080 2107 is accordingly replaced by the new
Due to the geometrical changes, engine housing
fan housing with starter mechanism 1123 080 2108.
1123 020 3027 is installed in the MS 250 C with
Easy2Start. This engine housing is already used in
the MS 210 C with Easy2Start.
TI_32_2004_30_01_01.fm Page 3 of 5
Technical Information 32.2004 Page 5
10. Summary
Item Part Name Previous New Remarks
1 Fan housing with starter mechanism, 1123 080 2107 --- 1)
MS 210 C Easy2Start
2 Fan housing with starter mechanism, --- 1123 080 2108 2)
MS 210/250 C Easy2Start;
including items 5 – 16
3 Fan housing, 1123 080 1808 --- 1)
MS 210 C Easy2Start
4 Fan housing, --- 1123 080 1809 2)
MS 210/250 C Easy2Start;
including items 5, 6
5 Shaft --- 1123 084 6501 2)
6 Segment 1123 084 7800 1123 084 7802 2) 3)
7 Rewind spring 1123 190 0600 2)
8 Rope rotor 1123 195 0401 2)
9 Starter rope dia. 2.7 x 910 mm (36 in) 4137 195 8200 2)
10 Pawl 1123 195 7200 2)
11 Spring 1128 195 3500 2)
12 Washer 1123 195 9001 2)
13 Spring housing (with spring) 1123 190 0700 2)
14 Driver 1123 195 2000 2)
15 Washer 0000 958 0806 2)
16 Circlip DIN 471-8 x 0.8 9455 621 0570 2)
17 Flywheel; 1123 400 1205 2)
including Items 18 – 20
18 Pawl 1123 195 7201 2)
19 Torsion spring 0000 998 1100 2)
20 E-clip DIN 6799-3.2 9460 624 0320 2)
21 Carburetor C1Q-S92 Easy2Start 1123 120 0620 4)
22 Ignition module 1123 400 1301 2)
23 Cable harness 1123 440 3002 2)
24 Engine housing 1123 020 3027 2)
25 Handlebar 1123 791 1701 2)
Other parts as before
Remarks
1) Previous version of part is no longer available from factory
2) New version of part can be used for the MS 210 C and MS 250 C with Easy2Start
3) Previous version of part remains available
4) New version of part can be used for the MS 250 C with Easy2Start
Last Technical Information on the STIHL MS 210, MS 250: 5.2002
Last Technical Information on the STIHL MS 210 C: 36.2003
© ANDREAS STIHL AG & Co. KG, 2004 Technical Documentation
D1/MTK-ja
TI_32_2004_30_01_01.fm Page 4 of 5
Page 5 of 5
Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.