Introduction
Husqvarna leaf blowers are a top choice for both residential homeowners and professional landscapers, known for their durability, power, and user-friendly design. One of the most helpful features included on gas-powered Husqvarna models is the air purge, a small but critical component that makes starting your blower far easier, especially after long periods of storage or if you accidentally run the unit out of fuel. If you’ve ever struggled to start your Husqvarna leaf blower, you’ve likely asked yourself: Where Is the Air Purge on a Husqvarna Leaf Blower? This question is one of the most common troubleshooting queries for Husqvarna owners, and the answer varies slightly depending on whether you own a handheld, backpack, or cordless model. In this comprehensive guide, we’ll walk you through exactly where to find the air purge on every popular Husqvarna leaf blower model, how to use it correctly, common mistakes to avoid, and troubleshooting tips for when the feature isn’t working as expected. By the end of this article, you’ll have all the information you need to start your blower quickly and keep it running smoothly for years.
- What Is the Air Purge Function?
- Why Husqvarna Includes an Air Purge
- Common Husqvarna Leaf Blower Models with Air Purge
- Where Is the Air Purge on a Husqvarna Leaf Blower?
- Location on Handheld Gas Models
- Location on Backpack Gas Models
- Location on Cordless Electric Models
- How to Use the Air Purge Correctly
- Step-by-Step Guide to Purging Your Husqvarna Leaf Blower
- Comparison of Air Purge Locations Across Popular Husqvarna Models
- Tips and Best Practices for Air Purge Maintenance
- Common Mistakes to Avoid When Using the Air Purge
- Troubleshooting Air Purge Issues
- Frequently Asked Questions
- Conclusion
What Is the Air Purge Function?
The air purge on a Husqvarna leaf blower is a small, rubber valve (often called a purge bulb) connected to the carburetor and fuel line system. Its primary purpose is to remove air pockets from the fuel line and carburetor, and to prime the engine with fresh fuel before starting. When a gas-powered leaf blower sits unused for an extended period, fuel can evaporate from the carburetor, leaving air in the fuel line. This air prevents fuel from reaching the engine, making starting difficult or impossible, even if the fuel tank is full. Pressing the air purge bulb pushes fuel from the tank into the carburetor, displacing air and ensuring the engine has the fuel it needs to start quickly and run smoothly.
Unlike a primer bulb, which is designed to add a small amount of fuel directly to the engine’s combustion chamber for cold starts, the air purge focuses on clearing the fuel line and carburetor of air. On many Husqvarna models, the same component serves as both the primer and air purge, while larger models may have separate dedicated components for each function. Understanding this distinction will help you use the feature correctly and avoid common starting issues.
Why Husqvarna Includes an Air Purge
Husqvarna has built its reputation on creating outdoor power equipment that is both powerful and accessible to users of all skill levels. The air purge feature is a direct result of this design philosophy: it eliminates one of the most common frustrations for new gas-powered leaf blower users, which is difficulty starting after storage. For homeowners who only use their leaf blower a few times per year, the air purge removes the need for complicated starting procedures or knowledge of carburetor tuning. For professional landscapers who use their blowers daily, the air purge ensures quick, reliable starts even if the unit is left sitting overnight between jobs. Additionally, the air purge helps prevent dry starts, which can cause excessive wear on the engine’s internal components and reduce the overall lifespan of the blower. By including this simple feature, Husqvarna reduces the likelihood of user error and ensures their equipment performs reliably in a wide range of conditions.
Common Husqvarna Leaf Blower Models with Air Purge
Nearly all gas-powered Husqvarna leaf blowers come standard with an air purge feature, regardless of whether they are handheld, backpack, or walk-behind models. The feature is designed to work seamlessly with the 2-stroke or 4-stroke engines that power these units, and it is included on every model released in the last 20 years. Popular handheld gas models with air purge include the 125B, 150BT, 350BT, and 525BX. Backpack gas models such as the 350BA, 550BTS, and 580BTS all include the feature as well. If you own a cordless electric Husqvarna leaf blower, such as the 120iB, 130iB, or 550iB, you will not find an air purge, as these battery-powered models do not have a carburetor or fuel system. It is important to note this distinction early, as many users search for the air purge on cordless models out of confusion, only to find no such component exists.
Where Is the Air Purge on a Husqvarna Leaf Blower?
The exact location of the air purge varies depending on the type of Husqvarna leaf blower you own, but it is always located near the carburetor and fuel system, as it is directly connected to these components. Below, we break down the location for each common model type, with specific examples for popular Husqvarna units.
Location on Handheld Gas Models
On handheld gas-powered Husqvarna leaf blowers, the air purge bulb is almost always located on the side of the carburetor, which is housed inside the air filter cover on the side of the blower’s engine housing. For most models, including the 125B and 350BT, the purge bulb is a small, soft rubber bulb roughly the size of a thumb, positioned just below the air filter cover latch. It is often unlabeled, but some models may have a small “Purge” or “P” marking next to it. On the 525BX model, the purge bulb is integrated into the primer bulb assembly, located on the front of the engine housing just below the throttle trigger. The bulb is designed to be easily accessible with your free hand while holding the blower, so you can prime the engine before starting without setting the unit down. If you are having trouble locating it, consult your owner’s manual for a diagram of your specific model’s components.
Location on Backpack Gas Models
Backpack Husqvarna leaf blowers have a larger engine housing, as they are designed to be worn on the user’s back for extended periods of use. The air purge bulb on these models is typically located on the upper front face of the engine housing, just below the fuel tank. On the 350BA and 550BTS models, the purge bulb is a slightly recessed rubber bulb, positioned to the right of the primer bulb (if your model has a separate primer) or integrated into the primer assembly. The recessed design prevents the bulb from being pressed accidentally while you are wearing the blower or moving through tight spaces. On larger professional backpack models like the 580BTS, the purge bulb may be located on the side of the engine housing, near the air intake vent, to make it easier to access while the unit is on your back. As with handheld models, the bulb is designed to be reachable with one hand, so you can prime the engine without removing the blower from your back.
Location on Cordless Electric Models
As mentioned earlier, cordless electric Husqvarna leaf blowers do not have an air purge feature, as they do not use gasoline or have a carburetor. These battery-powered models use an electric motor to drive the fan, so they require no priming or fuel system maintenance. If you own a cordless Husqvarna blower and are searching for the air purge, you can rest assured that no such component exists, and you do not need to perform any priming steps before starting. To start a cordless model, simply insert a fully charged Husqvarna battery into the battery compartment, press the power button, and pull the trigger to operate the blower. This is one of the key benefits of cordless models for casual users who do not want to deal with fuel mixing or starting procedures for gas-powered equipment.
How to Use the Air Purge Correctly
Using the air purge correctly is simple, but doing it wrong can lead to engine flooding or starting issues. The air purge is only required in specific situations: if your blower has been sitting unused for more than 7 days, if you accidentally ran the unit out of fuel while operating, or if you are starting the blower for the first time after refueling an empty tank. You do not need to press the air purge every time you start the blower if you use it regularly and keep the fuel tank full. Overusing the air purge can push too much fuel into the carburetor, leading to flooding, which will make starting even harder. To use the feature correctly, first locate the purge bulb for your model, then press it firmly 3 to 5 times, pausing 1 second between each press to let the bulb refill with fuel from the tank. You will know the purge is working when the rubber bulb feels firm to the touch and is visibly filled with fuel. Once the bulb is full, proceed to start the blower using the standard starter cord procedure. The engine should start within 1 to 2 pulls if the purge was successful.
Step-by-Step Guide to Purging Your Husqvarna Leaf Blower
If you are new to using a gas-powered leaf blower, following a clear step-by-step process will ensure you use the air purge correctly and avoid common mistakes. Below is a simple, 5-step guide to purging your Husqvarna leaf blower before starting:
- Prepare the blower for starting: Place the leaf blower on a flat, stable surface, such as a driveway or lawn. Ensure the throttle trigger is not engaged, and the stop switch (usually located near the throttle) is in the “on” position. This prevents accidental engagement of the blower while you are priming the engine.
- Locate the air purge bulb: Refer to the location guidelines earlier in this article for your specific model type. The bulb will be a small, soft rubber component near the carburetor or engine housing. If you are unsure, consult your owner’s manual for a labeled diagram of your model’s components.
- Press the purge bulb firmly: Using your thumb or index finger, press the purge bulb 3 to 5 times, pausing 1 second between each press to allow the bulb to refill with fuel from the tank. Do not press the bulb repeatedly more than 5 times, as this can cause engine flooding.
- Confirm the bulb is full of fuel: After 2 to 3 presses, the purge bulb should feel firm when pressed and will be visibly filled with fuel (if the bulb is clear or translucent). If the bulb remains soft after 5 presses, check that your fuel tank has enough fuel and that the fuel line is not clogged.
- Start the blower normally: Pull the starter cord smoothly and firmly 1 to 3 times. The engine should start quickly if the purge was successful. If it does not start after 3 pulls, wait 10 seconds and try again, or consult the troubleshooting section below for common issues.
This process should take less than 30 seconds, and will save you significant time and frustration compared to trying to start a blower with air in the fuel line.
Comparison of Air Purge Locations Across Popular Husqvarna Models
To make it easier to find the air purge on your specific Husqvarna leaf blower, we’ve compiled a comparison table of the most popular models and their air purge locations. This table covers the three main categories of Husqvarna leaf blowers: handheld gas, backpack gas, and cordless electric.
| Model Type | Popular Examples | Air Purge Location | Ease of Access |
|---|---|---|---|
| Handheld Gas | 125B, 150BT, 350BT, 525BX | Side of the carburetor, near the air filter housing; small, thumb-sized rubber bulb, sometimes integrated with the primer bulb on the front engine housing | Very Easy: Accessible with one hand while holding the blower, no need to set the unit down |
| Backpack Gas | 350BA, 550BTS, 580BTS | Upper front of the engine housing, just below the fuel tank; slightly recessed rubber bulb, sometimes separate from the primer bulb on larger professional models | Easy: Reachable with one hand while wearing the backpack, no need to remove the unit |
| Cordless Electric | 120iB, 130iB, 550iB | Not Applicable (no carburetor or fuel system) | N/A |
As the table shows, the air purge is only present on gas-powered models, and its location is designed to be as accessible as possible for users. If you cannot find the purge bulb on your model, consult your owner’s manual, as some specialized or older models may have slightly different component placement.
Tips and Best Practices for Air Purge Maintenance
Keeping your air purge in good working condition will ensure your Husqvarna leaf blower starts reliably every time. Below are a few practical tips and best practices to follow:
- Only use the air purge when necessary: Pressing the purge bulb 3 to 5 times is sufficient for most starting scenarios. Over-priming by pressing the bulb 10 or more times can flood the engine with fuel, making starting more difficult and potentially causing damage to the spark plug. Only use the air purge if the blower has been sitting for more than a week, if you ran it out of fuel, or if you are starting it for the first time after refueling an empty tank.
- Inspect the purge bulb regularly: Check the rubber purge bulb for cracks, brittleness, or signs of fuel leakage every few months, especially before long-term storage. A damaged purge bulb will not seal properly, so it will not push fuel into the carburetor effectively, and it can also create a fire hazard due to fuel leaks. Replacement bulbs are inexpensive and easy to install, requiring only basic tools to disconnect the fuel line.
- Use fuel stabilizer for long-term storage: If you plan to store your blower for more than a month, add a fuel stabilizer to the gas tank to prevent fuel from breaking down and evaporating. This will reduce the amount of air that builds up in the carburetor and fuel line, meaning you will need to use the air purge less often when you take the blower out of storage.
- Store the blower with a full fuel tank: If you do not use fuel stabilizer, store the blower with a full tank of fresh gasoline to minimize the amount of air in the tank, which reduces fuel evaporation. This simple step can eliminate the need to use the air purge after short-term storage of less than 2 weeks.
- Check the purge bulb before cold-weather use: Cold temperatures can make the rubber purge bulb brittle and less flexible, reducing its effectiveness. Before using your blower in temperatures below 40°F (4°C), press the bulb a few times to ensure it is still flexible and functioning properly. If the bulb feels stiff or cracked, replace it before use.
Common Mistakes to Avoid When Using the Air Purge
Many Husqvarna leaf blower users make simple mistakes when using the air purge that lead to starting issues or even damage to the blower. Avoiding these common errors will keep your equipment running smoothly:
- Pressing the purge bulb too many times: This is the most common mistake users make. Pressing the bulb more than 5 times will push excess fuel into the carburetor, causing flooding. A flooded engine will not start, and you will need to wait 10 to 15 minutes for the excess fuel to evaporate before trying again. To avoid this, stop pressing the bulb once it feels firm and is full of fuel.
- Trying to use the air purge on a cordless model: Cordless electric Husqvarna blowers do not have an air purge, as they have no fuel system. Pressing on the engine housing of a cordless model looking for a purge bulb can damage internal components or scratch the plastic housing. If you own a cordless model, you can skip all priming steps and start the blower directly by inserting the battery and pressing the power button.
- Ignoring a damaged purge bulb: A small crack in the purge bulb may seem insignificant, but it will prevent the bulb from creating the vacuum needed to pull fuel from the tank. This will make the air purge ineffective, leading to difficult starts. Additionally, fuel leaking from a cracked bulb is a serious fire hazard. Replace a damaged purge bulb immediately, even if it still appears to be working.
- Using the air purge as a fix for underlying fuel system issues: If you need to press the purge bulb 10 or more times to get fuel to flow, there is likely a clog in the fuel filter, fuel line, or carburetor. The air purge is not designed to fix these issues, and continuing to press the bulb will only worsen flooding. If you notice persistent issues with fuel flow, inspect the fuel system for clogs or damage, and clean or replace the affected components as needed.
Troubleshooting Air Purge Issues
If you are having trouble with the air purge on your Husqvarna leaf blower, the following troubleshooting steps will help you identify and fix the problem quickly:
- Purge bulb will not press down: If the purge bulb feels stiff or will not move when you press it, there is likely a clog in the fuel line between the tank and the bulb, or the bulb itself is damaged and has hardened with age. First, check the fuel line for kinks or blockages, and clear any clogs with a small wire or compressed air. If the line is clear, replace the purge bulb, as old rubber bulbs can harden and stop moving over time.
- Fuel does not fill the purge bulb after pressing: If the bulb remains soft after 5 presses, first check that the fuel tank has enough fresh gasoline. If the tank is full, check that the fuel shutoff valve (if your model has one) is open, and that the fuel filter is not clogged. A clogged fuel filter will prevent fuel from flowing from the tank to the purge bulb, so replace the filter if it is dirty or blocked.
- Engine still will not start after purging: If you pressed the purge bulb correctly and the engine still will not start, you may have flooded the engine by pressing the bulb too many times. Wait 10 to 15 minutes for the excess fuel to evaporate, then try starting the blower without pressing the purge bulb again. If the engine still does not start, check the spark plug for fouling, as excess fuel can coat the spark plug and prevent ignition.
- Fuel leaks from the purge bulb area: If you notice fuel dripping from the purge bulb or the fuel line connected to it, the purge bulb seal is damaged, or the fuel line is loose. Tighten any loose fuel line connections first, and if the leak persists, replace the purge bulb assembly. Fuel leaks are a serious fire hazard, so do not operate the blower until the leak is fixed.
Frequently Asked Questions
Do all Husqvarna leaf blowers have an air purge?
No, only gas-powered Husqvarna leaf blowers have an air purge feature. Cordless electric models, such as the 120iB and 130iB, use battery power and do not have a carburetor or fuel system, so they do not require an air purge. All gas-powered Husqvarna leaf blowers released in the last 20 years include this feature as a standard component to simplify starting.
How many times should I press the air purge bulb?
For most Husqvarna gas leaf blowers, you should press the air purge bulb 3 to 5 times. You will know it is working when the bulb fills with fuel and feels firm when pressed. Pressing more than 5 times can lead to engine flooding, which makes starting more difficult. If the bulb does not fill after 5 presses, check your fuel level and fuel line for clogs instead of pressing repeatedly.
Can I use the air purge if my blower has been sitting for months?
Yes, the air purge is especially useful if your blower has been in storage for more than a month. Over time, fuel can evaporate from the carburetor, leaving air pockets that make starting difficult. Using the air purge will push fresh fuel into the carburetor and remove those air pockets, making starting much easier. If the blower has been sitting for more than 6 months, you may also need to drain old, stale fuel from the tank and carburetor before use, as old fuel can damage the engine.
What do I do if my air purge bulb is cracked?
If you notice cracks, brittleness, or fuel leaking from the air purge bulb, you should replace it immediately. A damaged purge bulb will not seal properly, so it will not push fuel into the carburetor effectively, and it can also create a fire hazard due to fuel leaks. Replacement purge bulbs are inexpensive and available at most hardware stores or directly from Husqvarna. Installation is usually simple, requiring only basic tools to disconnect the fuel line from the old bulb.
Is the air purge the same as the primer bulb?
On many Husqvarna leaf blower models, the air purge and primer bulb are the same component. The primer bulb serves two purposes: it primes the carburetor with fuel when the blower has been sitting, and it acts as the air purge to remove air pockets from the fuel line. Some larger backpack models may have a separate, dedicated air purge bulb in addition to the primer bulb, so check your owner’s manual for your specific model to confirm.
Conclusion
Knowing Where Is the Air Purge on a Husqvarna Leaf Blower? is a simple but important piece of knowledge for any gas-powered Husqvarna owner. The air purge is a small, easy-to-use feature that eliminates the frustration of difficult starts, prevents engine damage from dry starts, and ensures your blower runs reliably no matter how long it has been sitting between uses. For handheld gas models, the purge bulb is located on the side of the carburetor near the air filter housing, while backpack models have the bulb on the upper front of the engine housing below the fuel tank. Cordless electric models do not have an air purge, as they have no fuel system to prime. By following the step-by-step guide, avoiding common mistakes, and performing basic maintenance on the purge bulb, you can keep your Husqvarna leaf blower running smoothly for years. If you ever have trouble locating the air purge on your specific model, consult your owner’s manual for a detailed diagram of your blower’s components, or contact Husqvarna customer support for assistance.