Stihl BG55 Leaf Blower Owners Manual

The Stihl BG55 is a lightweight, handheld gasoline-powered leaf blower designed for residential yard maintenance. It features a powerful 27.2cc engine, variable speed throttle, cruise control, ergonomic handle, anti-vibration system, translucent fuel tank, and a high-velocity nozzle. Below are key sections for safety, features, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: 27.2cc 2-stroke engine, Ergonomic rear handle with throttle trigger, Cruise control lock, Translucent fuel tank, High-velocity air nozzle, Anti-vibration system, Spark arrestor muffler.

Feature	Description
Engine	27.2cc single-cylinder 2-stroke air-cooled gasoline engine
Throttle Trigger	Variable speed control with lock-off safety
Cruise Control	Lock for continuous operation at set speed
Fuel Tank	Translucent for easy fuel level check (0.95 L / 32.2 fl oz capacity)
Air Nozzle	High-velocity design for efficient debris movement
Anti-Vibration	Reduces operator fatigue during extended use
Spark Arrestor	USDA Forest Service approved muffler screen
Starter	Easy2Start™ system for simplified starting
Weight	Approximately 4.2 kg (9.3 lbs) dry

Safety Information

Read all instructions before operation. Wear appropriate personal protective equipment (PPE).

Always wear eye protection, hearing protection, long pants, closed-toe shoes, and gloves.
Operate only in well-ventilated areas; gasoline engines produce carbon monoxide.
Keep bystanders, especially children and pets, at least 15 meters (50 feet) away.
Never point the 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 inspect contents. Assemble handle and nozzle if required.

Attach handle: Align with mounting points and secure with provided screws.
Attach nozzle: Slide onto blower outlet until it clicks into place.
Fuel mixture: Use fresh unleaded gasoline (min. 89 octane) mixed with STIHL 2-stroke oil at 50:1 ratio. Do not use automotive oil or fuel older than 30 days.
Starting procedure: Place on flat ground. Set master control lever to cold start position (choke on). Pull starter rope briskly until engine fires. Move lever to warm start position and pull again to start.

CAUTION! Ensure all fasteners are tight before operation. Run engine at idle for 1-2 minutes before applying load.

Specifications

Engine Displacement: 27.2 cc
Engine Power: 0.8 kW (1.1 hp)
Fuel Capacity: 0.95 L (32.2 fl oz)
Air Speed: Up to 209 km/h (130 mph)
Air Volume: Up to 750 m³/h (441 cfm)
Sound Power Level: 107 dB(A)
Vibration Level (left/right): 4.5/5.5 m/s²
Dry Weight: 4.2 kg (9.3 lbs)
Warranty: Limited 2-year consumer warranty

Controls and Operation

Master Control Lever: Choke positions (cold start, warm start, run). Throttle Trigger: Variable speed control. Throttle Lock: Cruise control for continuous operation. Stop Switch: Emergency engine stop.

Operating Procedure: Start engine as described. Allow warm-up. Squeeze throttle trigger to increase speed. Engage throttle lock if needed for extended blowing. Release trigger and lock to return to idle. Press stop switch to shut off engine.

Blowing Technique: Hold blower at comfortable angle. Use sweeping motions to gather debris into piles. Work with wind direction when possible for efficiency.

Fuel & Lubrication

Use only STIHL 50:1 2-cycle engine oil or equivalent ISO-L-EGD certified oil.

Mix fuel in clean, approved container: Add oil to gasoline, then shake thoroughly.
Fill tank: Use funnel to avoid spills. Do not overfill.
Lubrication: Engine is lubricated by oil in fuel mixture. No separate lubrication required.
Air filter: Clean every 10 operating hours or as needed in dusty conditions.

Tip: Label fuel container with mix date. Dispose of old fuel properly at recycling center.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Interval	Task
Before each use	Check for loose fasteners, damage, fuel leaks
Every 10 hours	Clean air filter; check spark plug
Every 20 hours	Clean spark arrestor screen (if equipped)
Every 50 hours	Replace spark plug; clean cooling fins
Annually	Inspect fuel lines; replace if cracked
As needed	Replace worn nozzle or damaged parts

WARNING! Always disconnect spark plug wire before performing maintenance.

Storage Guidelines

Prepare unit for storage if not used for 30 days or more.

Drain fuel tank completely or add fuel stabilizer.
Run engine until it stops to clear carburetor of fuel.
Clean exterior and cooling fins.
Store in dry, locked area away from heat sources.
Cover unit to prevent dust accumulation.

CAUTION! Never store unit with fuel in tank indoors or in poorly ventilated areas.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, flooded, spark plug	Check fuel level; wait if flooded; check/replace spark plug.
Engine runs poorly	Dirty air filter, old fuel	Clean air filter; drain and replace with fresh fuel mix.
Loss of power	Clogged spark arrestor	Clean spark arrestor screen (cool engine first).
Excessive vibration	Loose parts, damaged impeller	Tighten all fasteners; inspect impeller for damage.
Airflow reduced	Clogged nozzle or intake	Clear debris from nozzle and air intake.

Reset: For electronic ignition issues, disconnect spark plug wire for 1 minute.

Service: For repairs, contact authorized STIHL dealer. Do not attempt major repairs yourself.

Warranty Information

STIHL BG55 includes a 2-year limited warranty for consumer use. Warranty covers defects in materials and workmanship. Not covered: normal wear, misuse, improper maintenance, commercial use. Proof of purchase required. For warranty service, contact authorized STIHL dealer. Keep this manual with purchase receipt.