Stihl BG55 Leaf Blower Manual

The Stihl BG55 is a handheld gasoline-powered leaf blower designed for residential and commercial use. It features a powerful 2-stroke engine, variable speed throttle, ergonomic handle design, anti-vibration system, and a high-velocity air nozzle for efficient debris clearing. Below are key sections for safety, features, operation, maintenance, troubleshooting, and specifications.

1. Features at a Glance 2. Safety Information 3. Assembly & First Use 4. Specifications 5. Controls and Operation 6. Fuel & Oil Mixture 7. Maintenance Procedures 8. Storage Guidelines 9. Troubleshooting 10. Warranty & Support

Features at a Glance

Key components: 2-stroke engine, air filter, throttle trigger, choke lever, stop switch, fuel tank, blower tube, and ergonomic harness.

Feature	Description
Engine Type	2-stroke, single cylinder, air-cooled
Displacement	27.2 cc (1.7 cu. in.)
Fuel Tank Capacity	13.5 fl. oz. (0.4 liters)
Air Velocity	Up to 145 mph (233 km/h)
Sound Power Level	112 dB(A)
Weight (dry)	8.8 lbs (4.0 kg)
Anti-Vibration System	Reduced vibration handles
Throttle Trigger	Variable speed control with lock
Choke Lever	For cold starting
Stop Switch	Emergency engine stop

Safety Information

Read all instructions before operation. Wear appropriate PPE.

Always wear eye protection, hearing protection, long pants, and sturdy shoes.
Operate in well-ventilated areas only; gasoline engines produce carbon monoxide.
Keep bystanders, children, and pets at least 50 feet away.
Never point blower nozzle at people, animals, or windows.
Inspect unit before each use for loose parts or damage.

WARNING! Gasoline is highly flammable. Refuel outdoors with engine off and cool. Do not smoke near fuel.

Assembly & First Use

Unpack and assemble components. Prepare fuel mixture.

Attach blower tube: Align tube with outlet, twist clockwise until secure.
Install harness: Adjust straps for comfortable fit on shoulders.
Prepare fuel: Mix Stihl 2-stroke oil with unleaded gasoline (50:1 ratio).
Fill fuel tank: Use funnel to avoid spills.
Starting procedure: Set choke, press primer bulb, pull starter cord.

CAUTION! Ensure all fasteners are tight. Test throttle and stop switch before use.

Specifications

Model: Stihl BG55
Engine Power: 0.9 kW (1.2 bhp)
Fuel Consumption: Approx. 0.35 liters/hour
Air Volume: 441 cfm (750 m³/h)
Nozzle Diameter: 1.77 in (45 mm)
Ignition System: Electronic, capacitor discharge
Spark Plug: Bosch WSR6F or equivalent
Warranty: Limited 2-year consumer warranty
Compliance: Meets EPA Phase II and CARB regulations

Controls and Operation

Main controls located on handle assembly. Right handle: Throttle trigger with lock. Left handle: Choke lever, stop switch.

Starting: Move choke lever to cold start position (up). Press primer bulb 5-10 times. Pull starter cord briskly until engine fires. Move choke to run position (down). Pull cord again to start.

Operating: Squeeze throttle trigger for variable speed. Use full throttle for maximum air velocity. Engage throttle lock for continuous operation.

Stopping: Release throttle, allow engine to idle for 30 seconds. Press stop switch to "0" position.

Fuel & Oil Mixture

Use fresh unleaded gasoline (minimum 89 octane) mixed with Stihl 2-stroke engine oil.

Mix ratio: 50:1 (2.6 fl. oz. oil per 1 gallon gasoline).
Use approved measuring bottle for accuracy.
Shake container thoroughly before refueling.
Never use automotive oil or straight gasoline.
Discard fuel mixture after 30 days.

Tip: Store fuel in approved container labeled "2-Stroke Mix".

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

Daily: Clean air filter; check for debris in cooling fins.
Weekly: Inspect spark plug; clean or replace as needed.
Monthly: Check fuel filter; replace if clogged.
Seasonally: Clean carburetor; inspect blower tube for cracks.
Annually: Replace spark plug; check all screws and fasteners.

WARNING! Perform maintenance only when engine is off and cool. Disconnect spark plug wire for safety.

Storage Guidelines

Proper storage prevents fuel system damage and corrosion.

Drain fuel tank or add fuel stabilizer.
Run engine until it stops to clear carburetor.
Clean entire unit; apply light oil to metal surfaces.
Store in dry, covered area away from ignition sources.
Cover with breathable cloth; do not use plastic bags.

CAUTION! Never store unit with fuel in tank for more than 30 days without stabilizer.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, flooded, bad spark	Check fuel level; wait if flooded; check spark plug.
Engine runs poorly	Dirty air filter, old fuel	Clean/replace air filter; use fresh fuel mixture.
Loss of power	Clogged fuel filter, exhaust screen	Replace fuel filter; clean exhaust screen.
Excessive vibration	Loose parts, damaged tube	Tighten all fasteners; inspect blower tube.
Airflow reduced	Debris in nozzle, worn impeller	Clear nozzle; inspect impeller for damage.

Reset: Allow engine to cool completely before troubleshooting.

Service: Authorized Stihl dealers only. Do not attempt major repairs yourself.

Warranty & Support

Stihl Limited Warranty: 2 years for consumer use, 90 days for commercial. Proof of purchase required. Warranty does not cover normal wear, misuse, or improper maintenance. For technical support, contact Stihl Incorporated at 1-800-467-8445 or visit www.stihlusa.com. Always use genuine Stihl parts for repairs.