Stihl BG 55 Owners Manual: A Comprehensive Guide
This manual provides essential guidance for Stihl BG 55 blower operation‚ maintenance‚ and safety․ It covers specifications‚ assembly‚ fueling‚ troubleshooting‚ and warranty details․

The Stihl BG 55 is a powerful‚ yet lightweight‚ handheld leaf blower designed for homeowners tackling small to medium-sized properties․ This versatile tool efficiently clears leaves‚ grass clippings‚ and debris from lawns‚ patios‚ and driveways․ Powered by a reliable two-stroke engine‚ the BG 55 delivers an impressive air velocity of up to 140 mph and an air volume of 420 cubic feet per minute․
This owner’s manual provides comprehensive instructions for safe operation‚ proper maintenance‚ and effective troubleshooting‚ ensuring years of dependable performance from your Stihl blower․

Safety Precautions and Warnings
Important! Always read and understand the entire instruction manual before operating the Stihl BG 55․ Improper use can lead to serious injury․ Wear appropriate personal protective equipment‚ including eye and hearing protection‚ a dust mask‚ and sturdy footwear․ Never operate the blower in enclosed spaces or near flammable materials․
Ensure the blower is properly assembled and maintained․ Be aware of your surroundings and keep bystanders at a safe distance․ Disconnect the spark plug wire before performing any maintenance or repairs․
Understanding the BG 55 Components
The Stihl BG 55 is comprised of several key components working in unison․ These include the two-stroke engine‚ responsible for power‚ and the fan housing‚ directing airflow․ The blower tube focuses the air stream for effective debris removal․ The handle and grip provide control during operation‚ while the throttle controls engine speed․
Familiarize yourself with each part’s location and function for safe and efficient use․ Proper understanding aids in maintenance and troubleshooting‚ extending the blower’s lifespan․
Identifying Key Parts of the Blower

Essential components include the air filter housing‚ protecting the engine from debris‚ and the spark plug‚ initiating combustion․ Locate the fuel tank and oil tank caps for refueling․ The throttle trigger controls engine speed‚ while the on/off switch manages operation․ The blower tube connects securely‚ directing airflow․
Recognize the catalytic converter (if equipped) and understand its function in emissions control․ Identifying these parts facilitates maintenance‚ repairs‚ and safe operation of your Stihl BG 55․
BG 55 Technical Specifications
The Stihl BG 55 boasts a displacement of 27․2 cc and a power output of 1․0 kW (1․3 hp)․ It delivers a maximum air velocity of 140 mph (225 km/h) and an air volume of 420 cubic feet per minute (cfm)․ The fuel tank capacity is 13․6 fl oz (0․4 liters)․
Its weight‚ excluding accessories‚ is approximately 8․8 lbs (4․0 kg)․ These specifications highlight its efficiency for clearing leaves and debris in residential settings‚ offering a balance of power and maneuverability․
Assembly Instructions
Before operating your Stihl BG 55‚ proper assembly is crucial․ Begin by carefully unpacking all components and verifying their presence against the parts list in the owner’s manual․ Ensure the blower tube is securely attached‚ aligning the locking tabs correctly․
Next‚ install the handle and grip‚ tightening all screws firmly but avoiding over-tightening․ Double-check all connections for stability before use․ Improper assembly can lead to operational issues or safety hazards․
Attaching the Blower Tube
To attach the blower tube to your Stihl BG 55‚ align the tube’s connector with the blower housing’s receiver․ Rotate the tube until the locking tabs click securely into place‚ ensuring a firm connection․ Verify the tube is properly locked before each use to prevent detachment during operation․
A loose tube reduces blower efficiency and poses a safety risk․ Inspect the locking mechanism regularly for wear or damage‚ replacing parts as needed․ Proper attachment maximizes airflow and control․
Handle and Grip Installation
The Stihl BG 55 handle assembly typically involves attaching the upper handle to the blower housing using the provided bolts․ Ensure a secure fit‚ tightening the bolts firmly but avoiding over-tightening․ The grip is then slid onto the handle and locked into position‚ providing a comfortable and secure hold․
Proper handle and grip installation is crucial for operator control and safety․ Regularly check the bolts for tightness before each use‚ and inspect the grip for wear or damage‚ replacing if necessary․

Fueling and Mixing

Stihl BG 55 requires a precise 50:1 fuel mixture of unleaded gasoline and Stihl two-stroke engine oil for optimal performance and longevity․ Always use fresh gasoline and Stihl oil to prevent engine damage․ Thoroughly mix the fuel and oil in a clean container before adding it to the blower’s fuel tank․
Using the correct fuel mixture is vital․ Incorrect ratios can lead to engine failure or reduced blower efficiency․ Avoid spilling fuel and wipe up any spills immediately․
Recommended Fuel Mixture Ratio (50:1)
Stihl specifically recommends a 50:1 fuel-to-oil ratio for the BG 55 blower․ This translates to 50 parts of unleaded gasoline for every 1 part of Stihl two-stroke engine oil․ For example‚ when using one gallon of gasoline‚ add 2․6 ounces of Stihl oil․
Maintaining this precise ratio is crucial for proper engine lubrication and preventing premature wear․ Deviating from the 50:1 ratio can void your warranty and cause significant engine damage․
Using Stihl Two-Stroke Engine Oil
Stihl two-stroke engine oil is specifically formulated to provide optimal lubrication and performance for your BG 55 blower․ It ensures clean combustion‚ reduces deposits‚ and extends engine life․ Using other brands of oil may not offer the same level of protection and could potentially damage the engine․
Always adhere to the recommended 50:1 fuel mixture ratio when combining Stihl oil with gasoline․ Proper oil mixing is vital for reliable operation and longevity of your blower․
Starting the BG 55
Before starting‚ ensure the BG 55 is on a level surface and the blower tube is clear of obstructions․ Engage the choke for a cold start‚ positioning it according to the manual’s instructions․ Firmly grasp the starter handle and pull briskly until the engine attempts to start․

For a warm start‚ disengage the choke․ Repeat the pulling motion until the engine runs smoothly․ Always follow safety precautions during the starting process․
Cold Start Procedure
To initiate a cold start‚ position the choke lever to the ‘start’ position․ This enriches the fuel mixture for easier ignition in cold conditions․ Firmly depress the primer bulb several times until fuel is visible within it – do not overfill․ Grip the starter handle securely and pull with a swift‚ controlled motion․
Repeat this pulling action until the engine sputters and attempts to run‚ then gradually disengage the choke as it warms up․
Warm Start Procedure
For a warm start‚ ensure the choke lever is in the ‘run’ position – no choking is typically needed when the engine retains some heat․ Grip the starter handle firmly and pull with a smooth‚ deliberate motion․ The engine should ignite with minimal effort due to the retained warmth and residual fuel․
Avoid excessive pulling‚ as this can flood the engine․ If it fails to start‚ briefly engage the choke and try again․

Operating Instructions
To operate the BG 55‚ ensure a clear work area‚ free of obstructions and bystanders․ Hold the blower firmly with both hands‚ maintaining a balanced stance․ Direct the airflow towards the debris‚ using sweeping motions for efficient collection․ Adjust the throttle to control airflow and speed‚ matching it to the task at hand․
Avoid aiming the blower directly at people or animals‚ and be mindful of dust and debris direction․
Proper Blower Technique
Effective operation with the BG 55 involves sweeping motions‚ starting with debris edges․ Maintain a low blower angle to prevent scattering‚ and overlap passes slightly for complete clearing․ Vary the speed based on material – lower for loose leaves‚ higher for packed debris․
Avoid prolonged use at maximum throttle‚ and regularly check for obstructions․ Always direct airflow away from yourself and others‚ prioritizing safety during operation․
Adjusting Airflow and Speed
The BG 55’s airflow and speed are controlled via the throttle trigger․ Gently squeezing increases engine RPMs and airflow‚ while releasing decreases them․ For delicate tasks like drying grass‚ use a lower setting․ Heavier debris or larger areas require higher speeds for optimal performance․

Always adjust speed gradually‚ avoiding sudden bursts․ Monitor engine response and adjust accordingly to maintain control and efficiency during operation․
Maintenance and Care
Regular maintenance ensures your Stihl BG 55 operates reliably․ Key tasks include frequent air filter cleaning – a dirty filter reduces performance․ Inspect the spark plug periodically‚ replacing it when necessary for optimal ignition․
Always use genuine Stihl parts for replacements․ Proper care extends the blower’s lifespan and maintains its efficiency․ Following the schedule in the owner’s manual is crucial for long-term performance․
Air Filter Cleaning and Replacement
A clean air filter is vital for optimal BG 55 performance․ Regularly inspect the filter; a dirty filter restricts airflow‚ reducing power․ Tap it gently to remove loose debris‚ or wash with warm‚ soapy water‚ ensuring it’s completely dry before reinstalling․
Replacement is necessary when cleaning no longer restores airflow․ Use only genuine Stihl air filters to maintain engine protection and efficiency․ Refer to the owner’s manual for specific intervals․
Spark Plug Inspection and Replacement
Regular spark plug checks are crucial for reliable BG 55 starting and engine performance․ Inspect the plug for fouling‚ wear‚ or damage․ A properly functioning spark plug ensures efficient combustion․
Replacement should occur annually or as needed‚ using only the specified Stihl spark plug․ Ensure the correct gap before installation‚ consulting the owner’s manual for precise specifications․ A faulty spark plug can cause starting difficulties and reduced power․
Troubleshooting Common Issues
Addressing problems promptly keeps your BG 55 running smoothly․ A common issue is a failure to start‚ often due to stale fuel‚ a clogged carburetor‚ or a faulty spark plug․ Loss of power during operation can indicate a dirty air filter or incorrect fuel mixture․
Consult the manual for detailed diagnostic steps․ Always disconnect the spark plug wire before performing any maintenance․ Proper troubleshooting minimizes downtime and extends the blower’s lifespan․
Engine Won’t Start
If the engine fails to start‚ first check the fuel level and ensure fresh fuel is being used․ A clogged carburetor is a frequent culprit; cleaning it may resolve the issue․ Inspect the spark plug for fouling or damage‚ replacing it if necessary․
Verify the spark plug wire is securely connected․ Confirm the choke is properly engaged for a cold start․ Refer to the manual for detailed instructions and diagrams to aid in diagnosis and repair․
Loss of Power During Operation
Reduced blower performance often indicates a dirty air filter‚ restricting airflow to the engine․ Clean or replace the air filter as needed to restore optimal power․ A stale or improperly mixed fuel can also cause power loss; drain and refresh the fuel mixture․
Inspect the spark plug for signs of wear or fouling․ Ensure the blower tube isn’t obstructed․ Consult the manual for specific troubleshooting steps and recommended maintenance schedules․
Storage and Transportation
For long-term storage‚ drain the fuel tank completely and run the engine until it stalls to empty the carburetor․ Remove the spark plug and add a teaspoon of two-stroke oil into the cylinder‚ then pull the starter cord several times․
When transporting the BG 55‚ ensure the engine is cool and use a secure carrying case or vehicle restraint to prevent damage or fuel spillage․ Always follow local regulations for fuel transportation․
Long-Term Storage Procedures
Prior to extended storage‚ completely drain the fuel tank to prevent fuel degradation and carburetor issues․ Run the engine until it stops to ensure the carburetor is empty․ Remove the spark plug and introduce a teaspoon of STIHL two-stroke engine oil into the cylinder․
Gently pull the starter cord several times to distribute the oil․ Clean the blower thoroughly and store it in a dry‚ dust-free environment‚ away from direct sunlight․
Safe Transportation Guidelines
When transporting your Stihl BG 55‚ ensure the engine is completely cool․ Always disconnect the spark plug wire to prevent accidental starting․ Secure the blower in a vehicle to prevent shifting during transit‚ utilizing tie-down straps or a suitable carrying case․
Empty the fuel tank completely before transport to avoid spills and potential fire hazards․ Cover the air intake and exhaust outlet to prevent debris from entering․ Adhere to all local regulations regarding fuel transportation․
BG 55 vs․ Other Stihl Blowers (BG 65‚ BG 85)
The Stihl BG 55 offers a balance of power and affordability‚ ideal for residential use․ Compared to the BG 65‚ it provides slightly less blowing force but remains lightweight and maneuverable․ The BG 85 delivers significantly higher air volume and velocity‚ suited for larger properties and heavier debris․
Consider the BG 65 for moderate tasks and the BG 85 for demanding jobs․ All models share similar safety features and require 50:1 fuel mixture․
Understanding the Catalytic Converter (if equipped)
Stihl blowers‚ including some BG 55 models‚ may feature a catalytic converter to reduce harmful emissions․ This component utilizes a catalyst to convert exhaust gases into less polluting substances․ Proper fuel mixture – a 50:1 ratio of unleaded gasoline and Stihl two-stroke engine oil – is crucial for catalytic converter function․
Avoid using fuels containing methanol‚ ethanol‚ or MTBE‚ as they can damage the converter․ A malfunctioning converter may require professional servicing․

Warranty Information
Stihl offers a limited warranty on the BG 55 blower‚ covering defects in materials and workmanship․ The warranty period typically begins from the date of original purchase by the first retail customer․ Proper maintenance‚ as outlined in this manual‚ is essential to maintain warranty validity․
Warranty claims require proof of purchase and must be submitted through an authorized Stihl dealer․ Modifications or misuse may void the warranty․ Refer to the separate warranty statement for complete details․
Contacting Stihl Customer Support
For assistance with your Stihl BG 55‚ or to locate an authorized dealer‚ contact Stihl customer support․ You can reach them through their official website‚ which provides FAQs‚ parts diagrams‚ and contact forms․ A dedicated phone line is also available for direct assistance during business hours․
When contacting support‚ have your model and serial number ready․ This will help them efficiently address your specific needs and provide accurate information regarding parts or service․
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