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Stihl BR 550 Manual

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STIH) Technical Information 08.2005 New STIHL BR 500, BR 550 and BR 600 backpack blowers - Series 4282 Contents 1. Technical description 2. Specifications 3. Accessories 4. Service accessories and special tools 5. Service notes TI_08_2005_11_01_02.fm englisch / English

Section	Page
Contents	1
1. Technical description	2
1.1 Blowing system with electrostatic arrester	2
1.2 Control handle	3
1.3 Simplified starting	3
1.4 Blower holder	4
1.5 STIHL 4-MIX engine	4
1.5.1 Engine design	5
1.5.2 Engine control	5
1.5.3 Engine lubrication	6
1.6 Decompression system	7
1.7 Carburetor	7
1.8 Ignition system	7
1.9 Air filter	7
1.10 Muffler	7
1.11 Flywheel	7
2. Specifications	8
2.1 Engine	8
2.2 Fuel system	8
2.3 Ignition system	8
3. Accessories	9
4. Service accessories and special tools	9
4.1 Service accessories	9
4.2 Special servicing tools	10
4.2.1 Stop screw	10
4.2.2 Assembly tool	10
5. Service notes	11
5.1 Carburetor adjustment	11
5.1.1 Mechanical design	11
5.1.2 Maintenance / repair	11
5.1.3 Basic setting without limiter cap	12
5.1.4 Securing the limiter caps	12
5.2 Standard setting with limiter caps	13
5.3 Accelerator pump	13
5.4 Valve clearance	13
5.4.1 Preparatory steps	13
5.4.2 Top dead centre	14
5.4.3 Determine top dead centre	15
5.4.4 Check valve clearance	15
5.4.5 Set valve clearance	16
5.4.6 Assembly	16
5.5 Test the compression pressure	17
5.6 Mounting the blower tube and arrester	18
5.7 Adjusting the throttle cable	20
5.8 Install tank vent	20
5.9 Replace the pick-up body	21
5.10 Repair times	22