stihl leaf blower bg 85 manual

The STIHL BG 85 is a powerful, handheld gasoline-powered leaf blower designed for residential and commercial use. It features a powerful 1.1 HP engine, a variable-speed throttle for precise airspeed control, an ergonomic design with anti-vibration system, a translucent fuel tank, a comfortable harness, and a metal fan impeller. Below are key sections for safety, features, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Engine unit, Blower tube, Harness, Throttle trigger, Master Control lever, Stop switch, Fuel tank, Air filter cover.

Safety Information

Read all instructions before operation. Wear appropriate PPE.

1. Wear eye protection, hearing protection, long pants, closed-toe shoes, and gloves.
2. Operate only in well-ventilated areas to avoid carbon monoxide poisoning.
3. Keep bystanders, pets, and children at least 50 feet away.
4. Never point the blower tube at people, animals, or windows.
5. Be aware of dust and debris that may be blown.

WARNING! Gasoline is highly flammable. Refuel in a well-ventilated area with the engine off and cool. Do not smoke.

Assembly & First Use

Unpack and inspect all parts. Assemble blower tube to engine unit.

1. Attach the blower tube: Align the tube with the engine outlet and twist to lock.
2. Attach the harness: Connect the harness hooks to the designated rings on the blower body.
3. Fuel mixture: Prepare a 50:1 gasoline to 2-stroke engine oil mixture using STIHL HP Ultra or equivalent.
4. Fill the fuel tank: Use a fuel can with a spout. Do not overfill.

CAUTION! Ensure all connections are secure before starting the engine.

Specifications

• Model: STIHL BG 85.
• Engine Type: 2-stroke, single-cylinder.
• Displacement: 1.21 cu. in. (19.8 cm³).
• Power Output: 1.1 HP (0.8 kW).
• Maximum Airflow: 425 CFM.
• Maximum Air Speed: 150 MPH.
• Sound Pressure Level: Approx. 107 dB(A).
• Sound Power Level: Approx. 117 dB(A).
• Vibration Levels (left/right): Approx. 5.5/6.5 m/s².
• Warranty: Limited warranty for residential use.

Controls and Operation

Main Controls: Master Control lever (Stop/Choke/Run), Throttle trigger with lockout, Stop switch.

Operation: Put on harness. Start engine (see Starting Procedure). Use throttle trigger to control airspeed. Use sweeping motions for best results. For vacuum function (if equipped with kit), attach collection bag and nozzle.

Adjusting Harness: Loosen/tighten straps for a snug, comfortable fit that distributes weight evenly.

Fuel & Oil Mixture

Use only fresh, unleaded gasoline with a minimum octane rating of 89. Mix with a high-quality 2-stroke engine oil at a 50:1 ratio.

1. Use a clean, approved fuel container.
2. Add the correct amount of 2-stroke oil first.
3. Add gasoline to the desired volume. Shake gently to mix.
4. Do not use fuel older than 60 days. Do not mix oil directly in the machine's fuel tank.

Tip: Using STIHL HP Ultra oil is recommended for optimal engine performance and reduced carbon deposits.

Starting & Stopping Procedure

Follow these steps for safe starting.

1. Place the blower on a firm, clear surface.
2. Set Master Control lever to STOP (O).
3. Press the fuel pump bulb (primer) 5-10 times until fuel is visible.
4. Set Master Control lever to CHOKE (full left).
5. With left hand holding the blower, pull the starter rope sharply until engine fires (usually 1-3 pulls).
6. Immediately move Master Control lever to RUN (horizontal position).
7. Pull starter rope again to start engine. Allow to warm up at idle for 30 seconds.
8. To stop: Release throttle, let engine idle for 30 seconds, then move Master Control lever to STOP (O).

WARNING! Do not drop-start or "throw" start the engine. Keep the blower tube clear during starting.

Maintenance Schedule

Regular maintenance ensures long life and optimal performance.

Storage

Prepare the blower for storage if not used for more than 30 days.

1. Drain all fuel from the tank and run the engine until it stops to empty the carburetor.
2. Remove the spark plug and add 1-2 teaspoons of 2-stroke oil into the cylinder. Pull the starter rope slowly 2-3 times to coat internals, then reinstall the plug.
3. Clean the entire unit thoroughly.
4. Store in a cool, dry, and locked place, out of reach of children.

CAUTION! Storing with fuel in the tank can lead to gum deposits in the carburetor.

Warranty Information

STIHL BG 85 includes a limited warranty for residential use. The warranty period and terms vary by region. Proof of purchase from an authorized STIHL dealer is required. Warranty does not cover damage from misuse, neglect, improper fuel, or unauthorized repairs. For warranty service, contact the authorized STIHL dealer where the unit was purchased.

Troubleshooting

Service: For repairs not covered in this manual, contact an authorized STIHL servicing dealer.

Support: Visit www.stihlusa.com or call 1-800-467-8445 for dealer locations.