Stihl BG56C Manual

The Stihl BG56C is a professional-grade backpack leaf blower designed for heavy-duty landscaping and commercial use. It features a powerful 2-stroke engine, ergonomic backpack harness system, adjustable air velocity, vibration dampening, easy-start technology, and a robust tube/nozzle assembly. Below are key sections for safety, features, assembly, operation, maintenance, troubleshooting, and specifications.

Features at a Glance

Key components: 2-stroke engine, backpack frame, adjustable harness, throttle control, air tube, nozzle, fuel tank, and spark plug.

Feature	Description
Engine Type	2-stroke, single cylinder, air-cooled
Displacement	27.2 cc
Power Output	0.8 kW (1.1 hp)
Air Velocity	Adjustable up to 75 m/s
Air Volume	Up to 750 m³/h
Fuel Tank Capacity	1.0 liter
Starting System	Easy2Start™ technology
Vibration Dampening	Integrated anti-vibration system
Harness System	Padded, adjustable backpack straps
Noise Level	Approx. 105 dB(A)

Safety Instructions

Read all instructions before operation. Wear appropriate PPE.

1. Personal Protective Equipment: Always wear safety glasses, hearing protection, gloves, and sturdy footwear.
2. Operating Area: Keep bystanders, children, and pets at least 15 meters away.
3. Fuel Safety: Refuel outdoors only, with engine off and cool. Use STIHL MotoMix® or equivalent 50:1 fuel/oil mix.
4. Hot Surfaces: Avoid contact with muffler and engine areas during/after operation.

WARNING! Risk of fire, explosion, and serious injury. Do not operate in enclosed spaces or near flammable materials.

Assembly & Preparation

Unpack all components and inspect for damage.

1. Assemble backpack frame: Attach shoulder straps and waist belt according to diagram.
2. Mount blower unit: Secure blower to frame using provided mounting brackets.
3. Attach air tube: Connect tube to blower outlet, secure with locking collar.
4. Attach nozzle: Slide nozzle onto tube end, tighten clamp.
5. Fuel mixture: Prepare 50:1 gasoline/2-stroke oil mix. Fill fuel tank.

CAUTION! Ensure all fasteners are tight before operation. Do not force connections.

Specifications

• Model: BG56C
• Engine: STIHL 2-MIX® technology
• Displacement: 27.2 cm³
• Power Output: 0.8 kW at 7,500 rpm
• Max. Air Speed: 75 m/s
• Max. Air Volume: 750 m³/h
• Sound Pressure Level: 105 dB(A)
• Vibration Level (front/rear): 4.5/2.5 m/s²
• Weight (without fuel): 8.9 kg
• Warranty: 2 years commercial use

Controls and Settings

Main controls located on blower unit and harness.

Blower Unit: Throttle trigger, throttle lock, choke lever, stop switch, purge bulb, decompression valve.

Harness: Adjustable shoulder straps, waist belt, quick-release buckle, support pad.

Settings: Throttle response adjustable via carburetor screw (professional service only). Air velocity controlled by throttle trigger position. Harness adjustments for operator comfort and weight distribution.

Starting & Operation

Starting procedure for cold and warm engines.

1. Put on harness: Adjust straps for comfortable fit.
2. Fuel valve: Turn to ON position (if equipped).
3. Choke: Set to cold start position (closed).
4. Decompression valve: Press (if equipped).
5. Purge bulb: Press 5-6 times until fuel is visible.
6. Throttle lock: Engage.
7. Pull starter: Slowly until resistance felt, then pull briskly.
8. Warm-up: Allow 30-60 seconds at idle before full throttle.

Tip: For best performance, operate at full throttle during blowing tasks.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

1. Daily: Clean air filter, check for loose fasteners, inspect tube/nozzle for damage.
2. Weekly: Clean spark arrestor screen, check spark plug condition.
3. Monthly: Clean cooling fins, check fuel filter, inspect harness straps.
4. Seasonal: Replace spark plug, clean carburetor (professional service recommended).
5. Fuel System: Use fresh fuel mix, empty tank for storage over 30 days.

WARNING! Always disconnect spark plug wire before performing maintenance.

Storage Guidelines

Proper storage prevents fuel system issues and corrosion.

1. Empty fuel tank: Run engine until it stops from fuel starvation.
2. Drain carburetor: Follow service manual procedure.
3. Clean unit: Remove debris from cooling fins, tube, and exterior.
4. Store: In dry, well-ventilated area, protected from dust and moisture.
5. Long-term: Remove spark plug, add teaspoon of oil to cylinder, pull starter slowly to distribute.

CAUTION! Never store with fuel in tank for extended periods.

Warranty Information

STIHL Limited Warranty: 2 years for commercial use, 1 year for residential use from date of purchase. Warranty covers defects in materials and workmanship. Not covered: normal wear, improper maintenance, accident damage, use of non-STIHL parts or fuel. For warranty service, contact authorized STIHL dealer with proof of purchase. For support, visit www.stihlusa.com or call 1-800-467-8445.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel issues, spark plug	Check fuel mix, spark plug gap, air filter. Use fresh fuel.
Loss of power	Clogged filter, exhaust screen	Clean/replace air filter. Clean spark arrestor screen.
Excessive vibration	Loose components, imbalance	Tighten all fasteners. Check tube/nozzle alignment.
Hard starting when warm	Flooded engine	Move choke to open, hold throttle wide open while pulling starter.
Reduced air output	Tube blockage, worn impeller	Clear debris from tube. Inspect impeller for damage.

Service: For repairs beyond basic maintenance, contact authorized STIHL dealer.

Support: 1-800-467-8445; www.stihlusa.com