How to Start Stihl Bg55 Leaf Blower?

Introduction

The Stihl BG55 is a popular handheld leaf blower valued for its lightweight design, reliable two‑stroke engine, and strong airflow. Whether you are a homeowner clearing a modest yard or a landscaping professional tackling larger properties, knowing the correct starting procedure saves time, reduces wear, and prevents frustration. This guide walks you through everything you need to know about How to Start Stihl Bg55 Leaf Blower? from pre‑start checks to troubleshooting common problems, plus maintenance tips that keep the machine running smoothly season after season.

• Understanding the Stihl BG55
• Safety Precautions Before Starting
• Required Tools and Materials
• Step‑by‑Step Starting Procedure
• Troubleshooting Common Starting Issues
• Maintenance Tips for Reliable Starts
• Comparison: Stihl BG55 vs. Competing Models
• Best Practices for Longevity
• Common Mistakes to Avoid
• Frequently Asked Questions
• Conclusion

Understanding the Stihl BG55

The BG55 belongs to Stihl’s entry‑level blower lineup, yet it packs features normally found on higher‑end models. Its 27.2 cc two‑stroke engine delivers a maximum air velocity of 170 mph and an air volume of 412 cfm, making it capable of moving wet leaves, grass clippings, and light debris with ease. The unit weighs only 9.3 lb (4.2 kg) without fuel, which reduces operator fatigue during extended use.

Key Features

• Easy2Start™ system – a spring‑assisted starter rope that reduces the pulling force required.
• Anti‑vibration handle – isolates engine vibration for greater comfort.
• Adjustable throttle trigger – allows precise speed control.
• Transparent fuel tank – lets you see fuel level at a glance.

Engine Specifications

Safety Precautions Before Starting

Before you even think about pulling the starter rope, observe these safety rules to protect yourself and the equipment:

• Wear hearing protection, safety glasses, and sturdy gloves.
• Clear the work area of bystanders, pets, and loose objects that could become projectiles.
• Inspect the blower for cracked housing, loose screws, or damaged throttle cable.
• Never operate the blower in an enclosed space; carbon monoxide from the two‑stroke exhaust is hazardous.
• Keep the fuel container away from open flames and hot surfaces.

Required Tools and Materials

Having the right supplies on hand streamlines the starting process and prevents interruptions:

• Fresh 50:1 pre‑mixed fuel (or separate gasoline and 2‑stroke oil for mixing).
• Clean, lint‑free rag for wiping the spark plug and air filter.
• Spark plug socket (usually 13/16 in) and ratchet.
• Small screwdriver for the air filter cover.
• Owner’s manual for reference to model‑specific torque values.

Step‑by‑Step Starting Procedure

The following procedure covers both cold and warm starts. Follow each step in order; skipping steps often leads to hard starts or engine flooding.

Cold Start

1. Place the blower on a flat, stable surface with the throttle trigger in the “off” position.
2. Check fuel level through the transparent tank; fill with fresh 50:1 mix if below the “¼” mark.
3. Set the choke lever to the full choke position (usually marked with a snowflake icon).
4. Prime the carburetor by pressing the primer bulb 5–7 times until fuel is visible in the bulb.
5. Engage the throttle lock (if equipped) to hold the trigger at the “start” position.
6. Pull the starter rope briskly until you feel resistance, then give a strong, smooth pull. The Easy2Start™ spring will assist; do not yank violently.
7. When the engine fires, move the choke lever to the half‑choke position and pull the rope again if needed.
8. Allow the engine to warm for 15–30 seconds, then move the choke to the “run” (open) position.
9. Release the throttle lock and squeeze the trigger gently to verify smooth acceleration.

Warm Start

1. Ensure the throttle trigger is off and the choke lever is in the “run” position.
2. Press the primer bulb 2–3 times (fuel should already be in the carburetor).
3. Pull the starter rope once; the engine should fire immediately.
4. If it does not start, repeat the cold‑start choke steps briefly, then return to run.

Troubleshooting Common Starting Issues

Even a well‑maintained BG55 can refuse to start. The table below matches symptoms to likely causes and quick fixes.

Fuel Problems

• Stale or wrong fuel mix – Drain the tank, refill with fresh 50:1 mix, and prime again.
• Clogged fuel filter – Remove the filter from the tank line, clean or replace it.
• Fuel line cracks – Inspect for splits; replace any damaged sections.

Spark Plug Issues

• Fouled plug (black, oily) – Clean with a wire brush, check gap (0.025 in), or replace.
• No spark – Test with a spark tester; replace the ignition coil if necessary.

Air Filter Blockage

• Dirty foam filter – Wash in warm soapy water, rinse, dry, and lightly oil before reinstalling.
• Damaged filter element – Replace with a genuine Stihl filter to maintain proper airflow.

Maintenance Tips for Reliable Starts

Regular upkeep prevents most starting headaches. Incorporate these habits into your routine:

• Daily: Wipe the exterior, check for loose bolts, and verify the throttle moves freely.
• Every 10 hours: Clean the air filter, inspect the spark plug, and sharpen the blower tube if debris builds up.
• Every 25 hours: Replace the spark plug, check the fuel filter, and lubricate the throttle cable.
• Seasonally: Drain old fuel, run the engine dry, and store the unit in a dry, temperature‑controlled area.

Comparison: Stihl BG55 vs. Competing Models

Choosing the right blower often comes down to balancing power, weight, and price. The table below highlights how the BG55 stacks up against two common rivals.

Best Practices for Longevity

Adopting these habits extends engine life and keeps the blower starting on the first pull:

• Always use fresh, correctly mixed fuel; avoid gasoline older than 30 days.
• Run the blower at full throttle for a few minutes after each use to burn off carbon deposits.
• Store the unit with the fuel tank empty or add a fuel stabilizer if you must keep fuel in the tank.
• Keep the cooling fins clean; blocked fins cause overheating and hard starts.
• Follow the torque specifications in the manual when re‑installing the spark plug or muffler.

Common Mistakes to Avoid

Even experienced users sometimes slip up. Watch out for these frequent errors:

• Over‑priming – Too many primer presses flood the engine; 5–7 presses for cold start, 2–3 for warm.
• Leaving the choke on – Running with full choke after the engine fires loads the plug with fuel and stalls the motor.
• Using automotive oil – Only 2‑stroke oil rated for air‑cooled engines should be mixed; automotive oil causes carbon buildup.
• Ignoring the air filter – A clogged filter starves the engine of air, making starting difficult and reducing power.
• Pulling the starter rope at an angle – Pull straight out to avoid rope wear and starter pawl damage.

Frequently Asked Questions

How often should I replace the spark plug on a Stihl BG55?

Replace the spark plug every 25 hours of operation or at the start of each season, whichever comes first. A fresh plug ensures reliable ignition and easier starts.

Can I use ethanol‑free gasoline in my BG55?

Yes. Ethanol‑free gasoline reduces the risk of phase separation and gum formation, especially if the blower sits unused for weeks. Mix it with 2‑stroke oil at the 50:1 ratio.

What is the correct choke position for a warm start?

For a warm engine, set the choke lever to the “run” (open) position. Only use the half‑choke if the engine hesitates after a few pulls.

Why does my blower stall when I release the throttle trigger?

Stalling on throttle release usually indicates a lean condition caused by a dirty air filter, a clogged fuel filter, or an incorrectly adjusted carburetor. Clean or replace filters first, then consult a dealer for carburetor tuning.

Is the Easy2Start™ system serviceable by the owner?

The spring‑assist mechanism is sealed and not user‑serviceable. If the starter rope feels unusually heavy or the spring fails, take the unit to an authorized Stihl service center.

How do I store the BG55 for the off‑season?

Drain the fuel tank, run the engine until it stops, clean the air filter, remove the spark plug, add a few drops of oil into the cylinder, pull the starter rope slowly to distribute oil, then reinstall the plug. Store in a dry, frost‑free location.

Conclusion

Mastering the starting routine for the Stihl BG55 transforms a potentially frustrating chore into a quick, reliable process. By following the safety checks, using fresh 50:1 fuel, respecting the choke sequence, and keeping up with routine maintenance, you’ll enjoy consistent performance whether you’re clearing a driveway or a larger property. Remember the key steps: prime, choke, pull, adjust, and run. With these habits in place, the question How to Start Stihl Bg55 Leaf Blower? becomes a simple, repeatable procedure that keeps your blower ready whenever you need it.