STIHL BR 380 Parts Manual

The STIHL BR 380 is a professional-grade backpack leaf 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 380, including the engine assembly, fuel system, ignition system, air filtration, cooling system, exhaust system, clutch, fan housing, harness system, and blower tube. Use this manual for identification, maintenance, and repair part sourcing.

Introduction & Safety

This manual is intended for professional mechanics and trained personnel. Always refer to the official STIHL service manual for repair procedures. Use only genuine STIHL replacement parts.

WARNING! Always wear appropriate personal protective equipment (PPE) including safety glasses and gloves when handling parts or performing maintenance.

Engine Assembly Parts

Crankcase, cylinder, piston, crankshaft, connecting rod, bearings, and seals.

1. Crankcase (Part # 1128 020 1201): Main engine housing.
2. Cylinder (Part # 1128 020 1001): With integrated cooling fins.
3. Piston Assembly (Part # 1128 030 2001): Includes piston, rings, wrist pin, and circlips.
4. Crankshaft (Part # 1128 030 3001): Forged steel crankshaft.
5. Main Bearings & Seals: Ball bearings (Part # 9503 003 4630) and crankshaft seals (Part # 9640 003 4650).

NOTE: Engine assembly parts must be installed with precise tolerances. Refer to torque specifications.

Fuel System Parts

Fuel tank, cap, lines, filter, carburetor, and primer bulb.

1. Fuel Tank (Part # 1128 350 0601): Polyethylene tank with integrated mounting points.
2. Carburetor (Part # 1128 120 0601): Zama C1Q-S series carburetor.
3. Fuel Filter (Part # 0000 350 3501): In-tank sintered bronze filter.
4. Fuel Lines (Part # 1128 358 0700): 3.5mm ID fuel line (sold per meter).
5. Primer Bulb (Part # 1128 358 0901): For cold starting.

CAUTION! Use only ethanol-resistant fuel lines and STIHL MotoMix or equivalent fuel to prevent carburetor damage.

Ignition System Parts

• Ignition Module (Part # 1128 400 1301): Electronic control unit with advance curve.
• Spark Plug (Part # 0000 400 1301): Bosch WSR6F or equivalent. Gap: 0.020".
• Spark Plug Boot (Part # 0000 400 1305): Insulated boot with suppression resistor.
• Stop Switch (Part # 1128 852 1001): Integrated into throttle trigger assembly.
• Wiring Harness (Part # 1128 852 0801): Connects ignition to switch and ground.

Air Filtration & Cooling Parts

Air filter, cover, pre-cleaner, fan wheel, and shroud.

Air Filter (Part # 1128 140 2001): Dual-layer foam filter element. Pre-Cleaner (Part # 1128 140 2101): Outer mesh layer. Fan Wheel (Part # 1128 141 0601): Plastic impeller for engine cooling. Shroud/Cover (Part # 1128 141 0701): Directs cooling air over cylinder. Air Filter Cover (Part # 1128 140 2201): Secures filter with latch.

Exhaust System Parts

Muffler, gasket, spark arrestor screen, and deflector.

1. Muffler (Part # 1128 145 0801): With integrated heat shield.
2. Exhaust Gasket (Part # 1128 145 0901): Cylinder-to-muffler seal.
3. Spark Arrestor Screen (Part # 0000 350 9500): USFS-approved screen. Clean regularly.
4. Deflector (Part # 1128 145 1001): Directs exhaust gases away from operator.

Tip: Check spark arrestor screen monthly during heavy use to prevent carbon buildup and fire hazard.

Clutch & Drive Parts

Centrifugal clutch, drum, bearing, and drive shaft.

1. Centrifugal Clutch (Part # 1128 160 0601): Engages at approximately 2,800 RPM.
2. Clutch Drum (Part # 1128 160 0701): Houses clutch shoes.
3. Clutch Bearing (Part # 1128 160 0801): Needle bearing for drive shaft.
4. Drive Shaft (Part # 1128 160 0901): Connects clutch to fan wheel.
5. Clutch Spring Set (Part # 1128 160 1001): Three return springs.

WARNING! Clutch assembly rotates at high speed. Ensure all components are balanced and securely fastened.

Fan Housing & Blower Tube Parts

Housing, tube, nozzle, and vibration dampeners.

Harness & Control Parts

Backpack frame, harness straps, throttle trigger, lockout, and controls.

Backpack Frame (Part # 1128 791 0601): Aluminum frame. Harness Straps (Part # 1128 791 0701): Padded shoulder straps and waist belt. Throttle Trigger (Part # 1128 852 1101): With cable and lockout lever. Throttle Cable (Part # 1128 852 1201): Connects trigger to carburetor. Master Control Lever (Part # 1128 852 1301): Combined choke/stop/run control.

Fasteners & Hardware

Specialized screws, nuts, washers, and clips used throughout the unit.

• M5 x 25mm Flange Screw (Part # 9006 003 8825): For housing assembly.
• M6 Lock Nut (Part # 9500 003 1806): Nylon insert lock nut.
• Spring Washers (Part # 9500 003 1905): M5 size.
• E-Clips (Part # 9640 003 4600): For retaining pins on throttle linkage.
• Fuel Line Clamps (Part # 1128 358 1001): Small worm-drive clamps.

CAUTION! Use only specified STIHL fasteners. Substitutes may fail under vibration.

Parts Ordering & Exploded Views

Use the official STIHL IPL (Illustrated Parts List) for accurate diagrams. Contact an authorized STIHL dealer with the model number (BR 380) and part number.

Support: For technical assistance or to locate a dealer, visit www.stihlusa.com or call 1-800-467-8445.