STIHL BR 380 Manual

The STIHL BR 380 is a professional-grade backpack blower designed for demanding landscaping and cleanup tasks. It features a powerful 2-stroke engine, ergonomic harness system, adjustable airspeed, and durable construction for reliable performance. Below are key sections for safety, features, operation, maintenance, troubleshooting, and specifications.

Features at a Glance

Key components: High-performance 2-stroke engine, Backpack harness, Throttle trigger with lock, Air volume control, Blower tube, Spark arrestor muffler, Fuel tank, and Tool-free air filter access.

Safety Information

Read all instructions before use. Wear appropriate PPE: safety glasses, hearing protection, gloves, and sturdy footwear.

1. Operate in well-ventilated areas only; exhaust contains carbon monoxide.
2. Keep bystanders and pets at least 15 meters away during operation.
3. Inspect blower for damage before each use; do not operate if damaged.
4. Never point blower tube at people, animals, or fragile objects.
5. Use only STIHL-approved fuel mixture (50:1 gasoline to 2-stroke oil).

WARNING! Risk of fire and burns. Allow engine to cool before refueling or performing maintenance. Hot surfaces can cause injury.

Assembly & Preparation

Unpack and inspect all parts. Assembly requires no special tools.

1. Attach harness: Connect backpack frame to blower unit using provided clips.
2. Install blower tube: Align tube with outlet and twist clockwise until secure.
3. Adjust harness: Loosen straps, put on backpack, and tighten for snug fit.
4. Fuel mixture: Fill tank with fresh 50:1 mix (STIHL HP Ultra oil recommended).
5. Starting procedure: Set master control lever to cold start position, prime fuel bulb, pull starter cord firmly.

CAUTION! Ensure all connections are secure before operation. Do not force parts during assembly.

Technical Specifications

• Model: STIHL BR 380
• Engine: STIHL 2-MIX engine technology
• Ignition System: Electronic, capacitor discharge
• Carburetor:Diaphragm type with adjustable high/low speed screws Air FilterFelt/fleece combination, tool-free access Spark PlugSTIHL BOSCH WSR 6 F or equivalent Vibration DampingIntegrated anti-vibration system in handles and harness WarrantyLimited commercial warranty - refer to dealer for terms

  Controls & Operation

  Master control lever: STOP (0), RUN (I), COLD START (⏰). Throttle trigger with lock: Press lock to engage throttle. Air volume control: Dial on blower housing.

  Starting: 1. Set master control to COLD START. 2. Press primer bulb 5-10 times. 3. Pull starter cord until engine fires. 4. Move lever to RUN. 5. Squeeze throttle trigger to operate.

  Stopping: Release throttle, set master control to STOP. Allow engine to idle for 30 seconds before stopping for extended operation.

  Adjustments: Air volume control for different materials (leaves vs. debris). Harness straps for operator comfort. Carburetor adjustments by authorized dealer only.

  Fuel & Lubrication

  Use only fresh, unleaded gasoline (minimum 89 octane) mixed with STIHL 2-stroke oil at 50:1 ratio.

  1. Mix fuel in approved container: Add oil first, then gasoline.
  2. Shake container thoroughly before refueling.
  3. Fill tank to 80% capacity to allow for expansion.
  4. Clean fuel cap area before opening to prevent contamination.
  5. Use fuel within 30 days; discard old mixture.

  Tip: Store fuel in cool, dry place away from direct sunlight and ignition sources.

  Maintenance Schedule

  Daily: Check air filter, clean if dirty. Weekly: Inspect spark plug, blower tube, harness. Monthly: Clean cooling fins, check fuel lines.

  1. Air Filter: Remove, tap clean, or wash in soapy water (allow to dry completely).
  2. Spark Plug: Clean electrodes with wire brush, gap at 0.5 mm, replace if worn.
  3. Fuel Filter: Replace annually or if fuel flow is restricted.
  4. Carburetor: Professional service recommended annually.
  5. Exhaust System: Clean spark arrestor screen monthly during heavy use.

  WARNING! Always disconnect spark plug wire before performing maintenance. Engine must be completely cool.

  Storage Guidelines

  For storage over 30 days: 1. Drain fuel tank completely. 2. Run engine until it stops to clear carburetor. 3. Remove spark plug, add 1 teaspoon of oil through spark plug hole. 4. Pull starter cord slowly to distribute oil. 5. Store in dry, covered area.

  CAUTION! Never store with fuel in tank for extended periods. Fuel deterioration can damage engine components.

  Troubleshooting

  Symptom	Possible Cause	Corrective Action
  Engine won't start	No fuel, flooded, spark plug	Check fuel level; wait if flooded; clean/replace spark plug.
  Engine runs poorly	Dirty air filter, old fuel	Clean air filter; drain and replace fuel mixture.
  Loss of power	Clogged spark arrestor, carburetor	Clean spark arrestor screen; have carburetor serviced.
  Excessive vibration	Loose components, imbalance	Tighten all fasteners; check blower tube alignment.
  Airflow reduced	Obstructed tube, worn impeller	Clear debris from tube; inspect impeller for damage.

  Reset: For electronic issues, disconnect spark plug wire for 5 minutes to reset ignition module.

  Warranty & Support

  STIHL Limited Warranty: Coverage varies by region and use (commercial vs. residential). Proof of purchase required. Warranty does not cover normal wear, misuse, or improper maintenance. For technical support, contact authorized STIHL dealer or visit www.stihlusa.com. Keep this manual with unit for reference.

  STIHL BR 380 Manual © - All Rights Reserved 2025