The STIHL BR 550 is a professional-grade backpack blower designed for demanding commercial and residential applications. This parts manual provides detailed diagrams, part numbers, and ordering information for all components of the BR 550 blower, including the engine assembly, fan housing, throttle controls, fuel system, harness system, and muffler. Use this manual for identification, maintenance, and repair part sourcing.
This manual is intended for professional servicing personnel. Always use genuine STIHL replacement parts to ensure performance, safety, and warranty compliance.
| Warning Symbol | Meaning |
|---|---|
| ⚠️ | Indicates a potentially hazardous situation which, if not avoided, could result in serious injury. |
| ⚙️ | Refers to a specific maintenance or repair procedure. |
| # | Denotes a part number reference in the diagrams. |
WARNING! Disconnect the spark plug boot before performing any maintenance or parts replacement. Use appropriate safety equipment.
Cylinder, piston, crankshaft, bearings, and associated components.
Note: Engine parts are precision matched. Do not mix parts from different engine assemblies.
Components responsible for air intake and thrust generation.
CAUTION! A damaged or unbalanced impeller can cause excessive vibration and must be replaced.
Throttle trigger, cables, lockouts, and handle components.
Fuel tank, cap, lines, filter, carburetor, and primer bulb.
| Part Description | Part Number |
|---|---|
| Fuel Tank Assembly | 1130 350 0600 |
| Fuel Tank Cap | 1130 355 0600 |
| Fuel Line (Intake) | 1130 358 0601 |
| Fuel Filter | 0000 350 3505 |
| Carburetor (Zama C1Q-S266) | 1130 120 0650 |
| Primer Bulb | 1130 125 0600 |
| Impulse Line | 1130 130 0600 |
Tip: Replace fuel lines and filter annually or if hardening/cracking is observed.
Backpack frame, shoulder straps, hip belt, and blower tube.
WARNING! Inspect harness and frame for cracks or wear before each use. A failed harness can cause loss of control.
Muffler body, spark arrestor screen, gaskets, and heat shield.
Key components: Muffler (Part # 1130 145 0601), Spark Arrestor Screen (Part # 1130 146 0600), Muffler Gasket (Part # 1130 147 0600), Heat Shield (Part # 1130 148 0600).
CAUTION! The muffler becomes extremely hot during operation. Allow engine to cool completely before servicing. Clean spark arrestor screen regularly to prevent fire hazard.
Screws, nuts, washers, and clips used throughout the unit.
Always replace fasteners with the correct STIHL part. Do not use mismatched hardware.
Quick reference list of common part numbers.
| Component | Part Number |
|---|---|
| Complete Engine (Short Block) | 1130 020 0650 |
| Starter Assembly | 1130 070 0600 |
| Ignition Module | 1130 400 0601 |
| Spark Plug (Bosng WR7DC) | 0000 400 1305 |
| Air Filter Element | 0000 350 3205 |
| Anti-Vibration Mount Set | 4130 790 0600 |
| Blower Tube Kit | 4130 730 0602 |
| Complete Harness Kit | 4130 700 0601 |
Contact an authorized STIHL dealer to order parts. Provide the model number (BR 550) and the part number from this manual.
Note: Some parts are sold only in kits or assemblies. International part numbers may vary.
Refer to the following diagram groups for visual part identification and assembly order.
| Diagram Group | Covered Assemblies | Diagram Ref. # |
|---|---|---|
| Group 1: Engine | Crankcase, Cylinder, Piston | BR550-ENG-1 |
| Group 2: Fan & Airflow | Housing, Impeller, Intake | BR550-FAN-1 |
| Group 3: Controls | Handle, Throttle, Linkage | BR550-CTL-1 |
| Group 4: Fuel System | Tank, Carburetor, Lines | BR550-FUEL-1 |
| Group 5: Harness & Frame | Frame, Straps, Tube | BR550-HRN-1 |
| Group 6: Muffler | Muffler, Shield, Gasket | BR550-EXH-1 |
Service Support: For technical assistance, contact STIHL USA at 1-800-467-8445 or visit www.stihlusa.com.