How to Start a Stihl Br700 Leaf Blower?

How to Start a Stihl BR700 Leaf Blower? To start a Stihl BR700 leaf blower, place the blower on a flat surface, set the stop switch to the “I” (on) position, press the fuel pump bulb several times, move the choke lever to the cold start position, and pull the starter rope until the engine starts. Once it fires briefly, move the choke to the run position and pull the starter rope again until the blower runs smoothly.

Starting the Stihl BR700 correctly is important for smooth performance and to prevent engine flooding. The blower uses a simple starting system designed for quick ignition, but following the correct order—fuel pump, choke, and starter pull—makes the process much easier, especially when the engine is cold.

If the blower doesn’t start after a few pulls, check the fuel level, spark plug condition, and air filter. Proper maintenance and correct starting steps will keep your Stihl BR700 running efficiently and ready for heavy yard work.

Key Takeaways

• Always wear safety gear: Protect your eyes, ears, and lungs with goggles, ear protection, and a dust mask before starting.
• Use fresh fuel mix: The BR700 requires a 50:1 gasoline-to-oil ratio—never use straight gas or old fuel.
• Prime the engine correctly: Press the primer bulb 5–7 times to ensure fuel reaches the carburetor.
• Set the choke properly: Use full choke for cold starts; move to half or off once the engine sputters.
• Pull the starter cord smoothly: Avoid yanking—use steady, firm pulls until the engine starts.
• Warm up before use: Let the blower run for 30–60 seconds before increasing throttle.
• Troubleshoot common issues: If it won’t start, check fuel, spark plug, air filter, and choke settings.

Quick Answers to Common Questions

Should I use ethanol-free gas?

Yes, ethanol-free gasoline is ideal because it doesn’t absorb moisture or degrade as quickly, reducing the risk of carburetor clogs.

How often should I clean the air filter?

Clean the air filter every 10–15 hours of use or at the start of each season. A dirty filter reduces power and makes starting harder.

Can I start the BR700 without priming?

You can try, but it’s not recommended—priming ensures fuel reaches the carburetor, especially on cold starts.

What if the starter cord won’t pull?

Check for engine seizure or a stuck piston. If the cord won’t budge, don’t force it—take it to a Stihl service center.

Is it okay to store the blower with fuel in the tank?

No. Always drain the fuel or use a fuel stabilizer if storing for more than 30 days to prevent gum buildup.

How to Start a Stihl BR700 Leaf Blower

If you’ve just bought a Stihl BR700 backpack leaf blower—or you’re dusting off an old one for fall cleanup—you might be wondering how to get it running smoothly. Don’t worry. Starting this powerful machine is straightforward once you know the right steps. Whether you’re a first-time user or just need a refresher, this complete guide will walk you through everything you need to know to start your Stihl BR700 safely and efficiently.

The Stihl BR700 is a professional-grade backpack leaf blower known for its high airspeed and long runtime. But like any two-stroke engine, it requires the correct fuel mix, proper priming, and the right starting sequence. In this guide, we’ll cover pre-start safety checks, fuel preparation, step-by-step starting instructions, and troubleshooting tips so you can get back to clearing leaves, debris, and grass clippings with confidence.

Step 1: Safety First – Prepare Yourself and Your Workspace

Before you even touch the starter cord, take a moment to ensure you’re safe and ready.

Wear Proper Protective Gear

Always wear safety goggles to protect your eyes from flying debris. The BR700 can kick up dust, twigs, and small stones at high speeds. Ear protection is also essential—this blower runs at over 100 decibels, which can damage hearing over time. A dust mask or respirator is highly recommended, especially if you’re working in dry, dusty areas.

Choose a Safe Starting Location

Start your blower on a flat, stable surface away from dry leaves, grass, or flammable materials. Avoid starting it indoors or in enclosed spaces—gasoline engines produce carbon monoxide, which is dangerous in poorly ventilated areas. A concrete driveway or open lawn is ideal.

Inspect the Blower

Give your BR700 a quick visual check. Look for loose parts, cracks in the housing, or damage to the air intake. Make sure the fuel cap is secure and the air filter cover is closed. If anything looks damaged, don’t start it—get it checked by a Stihl dealer.

Step 2: Prepare the Correct Fuel Mix

The Stihl BR700 is a two-stroke engine, which means it runs on a mixture of gasoline and oil. Using the wrong fuel can damage the engine or cause it to fail to start.

Use Fresh, High-Octane Gasoline

Always use fresh, unleaded gasoline with an octane rating of 89 or higher. Never use gasoline that’s been sitting in a can for more than 30 days—ethanol in gas can degrade over time and cause starting problems.

Mix Fuel at the Correct Ratio

The BR700 requires a 50:1 fuel-to-oil ratio. That means 2.6 ounces of two-stroke engine oil per 1 gallon of gasoline. Use only high-quality, synthetic two-stroke oil designed for air-cooled engines—Stihl HP Ultra oil is a great choice.

Mix Fuel in a Clean Container

Use a dedicated fuel mixing bottle or a clean gas can. Pour the oil in first, then add the gasoline to prevent oil from sticking to the bottom. Close the container and shake gently to mix. Label the container with the date—only mix what you’ll use within a month.

Step 3: Fill the Fuel Tank

Now that your fuel is ready, it’s time to fill the blower.

Locate the Fuel Tank

On the BR700, the fuel tank is on the right side of the backpack frame. Unscrew the fuel cap slowly to release any pressure.

Add Fuel Carefully

Use a funnel to avoid spills. Fill the tank to about 90% full—leave a little space to prevent overflow when you reattach the cap. Wipe up any spilled fuel immediately—gasoline is flammable and can damage paint or plastic.

Secure the Fuel Cap

Tighten the cap firmly by hand. Don’t over-tighten, but make sure it’s sealed to prevent leaks or vapor loss.

Step 4: Prime the Engine

Priming helps get fuel into the carburetor so the engine can start more easily.

Locate the Primer Bulb

The primer bulb is a small, clear plastic button on the side of the carburetor. It’s usually near the fuel line.

Press the Primer Bulb

Press the bulb 5 to 7 times until you see fuel moving through the clear tube. You should feel resistance as it fills. Don’t press it more than 7 times—over-priming can flood the engine.

Step 5: Set the Choke

The choke controls the air-fuel mixture for cold starts.

Move the Choke Lever to “Start” Position

On the BR700, the choke lever is usually on the side of the engine. Push it all the way to the “Start” or “Closed” position (often marked with a snowflake or “Choke” symbol). This restricts airflow and enriches the fuel mixture for a cold engine.

Step 6: Engage the Throttle Lock

The throttle lock keeps the engine from stalling during startup.

Press the Throttle Trigger

Hold down the throttle trigger (the lever under your finger on the handle).

Push the Throttle Lock Button

While holding the throttle, press and hold the small lock button next to it. This locks the throttle at a slightly open position, giving the engine enough fuel to start without flooding.

Step 7: Start the Engine

Now it’s time to pull the starter cord.

Hold the Blower Securely

Place the blower on the ground or hold it firmly against your body. If it’s on the ground, stand over it with one foot on the frame for stability.

Pull the Starter Cord

Grasp the handle on the starter cord firmly. Pull it out slowly until you feel resistance (this is the compression point), then give it a strong, smooth pull. Don’t yank it—steady force works best.

Repeat if Necessary

It may take 2 to 5 pulls for a cold engine to start. If it doesn’t start after 5 pulls, wait 30 seconds and try again. Avoid pulling more than 8 times in a row—this can flood the engine.

Step 8: Adjust the Choke and Warm Up

Once the engine sputters or starts briefly, it’s time to adjust the choke.

Move Choke to “Half” or “Run” Position

As soon as the engine fires, move the choke lever to the halfway position. If it runs smoothly, move it to the “Run” or “Open” position (marked with a sun or “Run” symbol).

Let the Engine Warm Up

Allow the blower to idle for 30 to 60 seconds. This lets the engine warm up and stabilizes the fuel flow. Don’t rev the engine immediately—sudden throttle can cause it to stall.

Step 9: Release the Throttle Lock and Begin Use

Now you’re ready to go.

Release the Throttle Lock

Let go of the throttle trigger and the lock button. The throttle should return to idle.

Test the Throttle

Squeeze the throttle gently to make sure the engine responds. If it revs smoothly, you’re ready to start blowing.

Troubleshooting Common Starting Issues

Even with perfect steps, sometimes the BR700 won’t start. Here’s how to fix the most common problems.

Engine Won’t Start After Multiple Pulls

Check the fuel—is it fresh and properly mixed? Is the primer bulb working? Try re-priming and ensure the choke is fully closed. If it still won’t start, the spark plug may be fouled.

Engine Starts Then Dies

This usually means the choke is still on. Move it to the “Run” position. If it dies at idle, the air filter may be clogged or the carburetor may need adjustment.

Flooded Engine

If you’ve pulled the cord too many times, the engine may be flooded. Turn the choke to “Run,” hold the throttle wide open, and pull the cord several times without priming. This helps clear excess fuel.

No Spark

Remove the spark plug and check for cracks or carbon buildup. Replace if necessary. You can test for spark by grounding the plug against the engine and pulling the cord—look for a blue spark.

Clogged Air Filter

A dirty air filter restricts airflow. Remove the cover, take out the filter, and clean it with soap and water (if foam) or replace it (if paper). Let it dry completely before reinstalling.

Conclusion

Starting your Stihl BR700 leaf blower is simple when you follow the right steps. From safety checks and fuel prep to priming, choking, and pulling the cord, each step plays a key role in getting your machine running smoothly. Remember to use fresh 50:1 fuel mix, wear protective gear, and never skip the warm-up period.

With regular maintenance and proper starting technique, your BR700 will deliver powerful, reliable performance season after season. Now that you know how to start it like a pro, you can tackle yard cleanup with confidence and ease.