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Stihl MS 251 Manual

Stihl MS 251
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110 MS 231, MS 231 C, MS 251, MS 251 C
13. Special Servicing Tools
New Special Tools
Existing Special Tools
No. Description Part No. Application Rem.
1 Punch-down tool 5910 890 4000 Fitting electrical wires in guides
No. Description Part No. Application Rem.
1 Carburetor and engine tester 0000 850 1300 Testing engine and carburetor for leaks
- Nipple 0000 855 9200 Testing carburetor for leaks
- Hose for leakage test 1110 141 8600 Testing carburetor for leaks
2 Sealing plate 0000 855 8106 Testing engine for leaks
3 Installing tool 0000 890 2201 Installing rope guide bushing
4 Locking strip 0000 893 5904 Blocking the crankshaft
5 Screwdriver bit, T 27 x 125 0812 542 2104 Removing and installing spline socket
screws with electric or pneumatic
screwdrivers; tightening down screws
with torque wrench
6 Wooden assembly block 1108 893 4800 Lowering tank housing, maintaining
clearance
7 Assembly drift 1110 893 4700 Removing and installing piston pin
8 Setting gauge 1111 890 6400 Adjusting air gap between the ignition
module and flywheel
9 Installing tool 1116 893 4800 Installing rewind spring
10 Assembly tube 1117 890 0900 Attaching springs
11 Test flange 1118 850 4200 Leakage Test
12 Installing sleeve 1118 893 4602 Protecting the oil seal
(clutch side)
13 Press sleeve 1122 893 2405 Installing oil seal
(clutch side/ignition side)
14 Combination wrench 1129 890 3401 Spark plug 1)
15 Installing sleeve 1141 893 4600 Protecting the oil seal
(ignition side)
16 Clamping strap for assembly
stand
5910 850 1650 Clamping machine to assembly stand
17 Ignition system tester, ZAT 4 5910 850 4503 Testing ignition system
18 Ignition system tester, ZAT 3 5910 850 4520 Testing ignition system
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Stihl MS 251 Specifications

General IconGeneral
Idle speed2800 RPM
Motor type2-stroke motor
Chain pitch1/308 \
Blade length450 mm
Product colorBlack, Grey, Orange
Motor speed (max)10000 RPM
Oil tank capacity0.2 L
Fuel tank capacity0.39 L
Engine displacement45.6 cm³
Kickback protectionYes
Engine power3 hp
Power sourceGasoline
Sound power level114 dB
Vibration emission3.9 m/s²
Sound pressure level103 dB
Weight and Dimensions IconWeight and Dimensions
Weight4900 g

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