Husqvarna Self-Propelled Lawn Mower Troubleshooting

Husqvarna self-propelled mowers are best suited for your residential lawn maintenance. They are powerful, durable and efficient.

However, they can also develop faults such as starting issues, loss of power, vibration problems and uneven cuts. 

Continue reading until the end to learn about the 9 Husqvarna self-propelled lawn mower troubleshooting tips that can guide you to get the mower working again.

Ready? Let’s dive right into it:

Husqvarna Self-Propelled Lawn Mower Problems and Troubleshooting Tips

Before I go into details, let’s look at some common Husqvarna self-propelled lawn mower problems and their troubleshooting tips:

Problems	Troubleshooting Tips
1. Husqvarna self-propelled mower won’t start	Drain bad or old gas. Clean or replace the clogged air filter. Clean or change the dirty or damaged spark plug. Tighten the loosened blade and replace the broken adapter. Fill the gas tank with fresh gas. Replace the fuel filter Clear out clogs from the fuel lines or replace them.
2. Loss of power	Drain bad or old gas. Clean or replace the air filter. Clean or replace the dirty carburetor. Clean the fuel line. Replace the cooling fins.
3. Excessive vibration	Remove the debris or replace pulleys and spindles. Replace the bad clutch.
4. Poor or uneven cut	Clean or replace the mower deck. Replace the mower blades.
5. Husqvarna self-propelled mower is smoking	Fill the oil to the recommended level. Contact a technician to fix internal engine damage. Clean or replace the clogged air filter.
6. Mower runs rough	Drain the gas tank and fill it with fresh gas. Clean or replace the clogged air filter. Replace the faulty spark plug.
7. Husqvarna self-propelled lawn mower won’t move	Secure or replace the worn drive pump belt. Replace the missing key in the axle.  Change the hydraulic oil. Allow the hydraulic oil to be cool. Change the hydraulic fluid and bleed the air from the system
8. Engine overheats	Clean or replace the cooling fins. Clean or replace the clogged air filter. Sharpen and balance the mower blades. Change the engine oil and add fresh oil
9. Husqvarna lawn mower not self-propelling	Replace the broken or worn-out V-belt. Change the broken or worn-out drive pulley. Replace the wheel assembly.

1. Husqvarna Self-Propelled Mower Won’t Start

If your Husqvarna self-propelled mower won’t start, the likely causes are old or bad gas, clogged air filter, damaged or dirty spark plug, loosened blade or broken blade adapter, no gas in the tank, clogged fuel filter and clogged fuel lines

Here are some troubleshooting tips to solve Husqvarna self-propelled lawn mower problems:

Drain Bad or Old Gas

It is important to check the fuel tank if the gas is more than thirty days in it. Furthermore, leaving your mowing machine may get the gas contaminated by rain. Ensure that you drain the bad or old gas and fill it with fresh one.

Clean or Replace Clogged Air Filter

Make sure that you always check your air filter if your mower has starting issues. You can clean it or replace it if it is in a bad condition.

Clean or Change Damaged or Dirty Spark Plug

A faulty spark plug causes an intermittent spark which can result in starting problems. In this case, you need to clean the spark plug if it is dirty. Replace it if it is bad.

Tighten the Loosened Blade and Replace the Broken Adapter

Ensure that you tighten the loosened blade and also replace the broken adapter to prevent starting problems.

Fill the Gas Tank with Fresh Fuel

If you notice that there is no fuel in the tank, it is important to fill the gas tank with fresh gas.

Replace the Fuel Filter

A fuel filter that is clogged with dirt can restrict fuel flow. If this happens, make sure that you replace it with a new one.

Clear Out Clogs from the Fuel Lines or Replace Them

Dirt and bad gas deposits can accumulate and block the fuel lines and this will prevent them from getting the required gas. 

Ensure that you use compressed air and carb cleaner to clear the clogs from the fuel filter. You can also replace it if necessary.

2. Loss of Power

The likely causes of your Husqvarna self-propelled lawn mower losing power include bad gas, clogged air filter, dirty carburetor, clogged fuel line and broken cooling fins.

Here are some proven fixes that can help you to solve these problems:

Drain Bad or Old Gas

It is important to check the fuel tank if the gas is more than thirty days in it. Ensure that you drain the bad or old gas and fill it with fresh one.

Clean or Replace the Clogged Air Filter

Dirt and grass can clog the air filter and this can prevent airflow. You need to clean or replace the lawn mower air filter to prevent the mower from losing power. 

Clean or Replace the Dirty Carburetor

It is important to clean all related components with your carburetor so that you can prevent it from losing power. You can also replace it if it is in a bad condition.

Clean the Fuel Line

If you notice that the fuel line is clogged, you need to clean it with a carb cleaner and compressed air so that it can clear the clogs. 

Replace the Cooling Fins

If you notice that the cooling fins are in a bad condition, you need to get rid of them and replace them so that your mower won’t lose power.

3. Excessive Vibration

Your Husqvarna self-propelled mower can vibrate excessively as a result of debris stuck underneath the pulleys or around the spindle, or a damaged clutch.

You can check these practical fixes to troubleshoot the problem:

Remove the Debris or Replace the Components

Remove the debris that is stuck underneath the pulleys or around the spindle If it does not work after cleaning the debris, you may need to replace the pulleys and spindles.

Replace the Bad Clutch

It is important to replace the clutch if it is defective. You can also contact a technician to help you if you cannot handle its replacement process.

4. Poor or Uneven Cuts

Poor or uneven cuts can be a result of a mower deck failure, worn, loose or bent blades. Here are some troubleshooting tips to solve poor or uneven cuts:

Clean or Replace the Mower Deck

If you notice that your mower is cutting unevenly, you need to inspect the mower deck for defects in its components. 

In this case, clean the deck if it is clogged with dirt and debris or replace it if the components or the mower deck itself is damaged.

Tighten the Blade Bolts and Replace Worn or Bent Mower Blades

It is important to inspect the blades if your mower is cutting unevenly. Tighten the blade bolts to troubleshoot loose blades or replace them if they are worn or bent.

5. Husqvarna Self-Propelled Mower is Smoking

If your self-propelled mower is smoking, it may be that your mower engine runs too rich and burns off more gas than air. 

Reasons for this problem include engine oil being too low or too much, an internal engine problem, and a dirty air filter. Here are some troubleshooting tips to solve the problem:

Fill the Oil to the Recommended Level

If the engine oil level is too low or too much, troubleshoot the problem by filling the oil to the correct levels according to Husqvarna’s recommendations.

Contact a Technician to Fix Internal Engine Damage

This is usually a big issue to troubleshoot. It is important to take your self-propelled lawn mower to a nearby service store to help you troubleshoot the problem.

Clean or Replace the Air Filter

It is also important to inspect if the air filter is dirty. If it is dirty, make sure that you clean it. If it is in bad condition, ensure that you replace it. Here are some steps on how to clean the air filter on your Husqvarna self-propelled lawn mower:

• Remove the cover.
• Carefully remove the cartridge
• Clean the air filter by gently tapping it against a flat surface. You can also use a brush to clean it.
• If it is very dirty, you need to replace the air filter.

6. Mower Runs Rough

If your self-propelled lawn mower runs roughly or bogs down, it can be due to old gas, a clogged air filter or a faulty spark plug. You can fix this problem by following these troubleshooting tips:

Drain The Gas Tank and Fill it with Fresh Tank

Old gas can cause restrictions due to the sticky and thick substance that is left behind by it. Drain the gas tank and fill it with fresh gas mixed with a gas additive to clean the fuel system and stabilize the gas.

Clean or Replace the Clogged Air Filter

Dirt and grass can clog the air filter and prevent airflow. To prevent this from happening, ensure that you remove the air filter and clean it. You can also replace it if the air filter is bad.

Replace the Faulty Spark Plug

If you notice that your spark plug is causing an intermittent spark, it is important to replace the faulty spark plug with a new one.

7. Husqvarna Self-Propelled Lawn Mower Won’t Move

This is one of the common problems that users face with Husqvarna self-propelled lawn mowers.

The mower may fail to move because of a worn drive pump belt, a missing key in the axle, low or old hydraulic oil, hot hydraulic fluid and air in the hydraulic system.

Here are some troubleshooting tips for fixing the problem:

Secure or Replace the Worn Drive Pump Belt

The first step to take is to ensure that the drive belt is in good condition. Make sure that it is properly secured around the pulleys. Check the drive belt for wear and replace it if it is worn.

Replace the Missing Key in the Axle

The key in the axle may fall off, making the mower not move. It is important to replace the key. Furthermore, check for broken or missing idler springs and replace them.

Change the Hydraulic Oil 

It is important to change the hydraulic oil at regular intervals. This should be according to Husqvarna’s recommendations.

Allow the Hydraulic Oil to Be Cool

The simple fix to troubleshooting issues with hot hydraulic fluid is to allow the oil to be cool.

If you notice that the mowing machine works well when it is cold but becomes weak when the hydraulic system gets hot, it is best to have it checked at a local Husqvarna dealership. 

Change the Hydraulic Fluid and Bleed the Air From the System

Make sure that you change the hydraulic fluid by following Husqvarna’s procedures. You should also bleed the air from the system according to the instructions in your owner’s manual.

8. Engine Overheats

When the engine of your self-propelled mower overheats, it is advisable to stop the mower to avoid further engine damage.

The causes for this problem include clogged engine cooling fins, clogged air filters, dull mower blades and low engine oil. Here are some ways to troubleshoot the problem:

Clean or Replace the Cooling Fins

The cooling fins will be unable to move air to cool the engine block and cylinder heads if they are clogged. Make sure that you clean them or replace them if they are damaged.

Clean or Replace the Air Filter

Check the air filter for dirt, and debris on the air filter. After that, clean the air filter or replace it if it is in a bad condition.

Sharpen and Balance the Mower Blades

Dull mower blades can also make it overheat. Sharpen and balance the mower blades to troubleshoot the issue.

Change the Engine Oil and Add Fresh Oil

Ensure that you change the engine oil and add fresh oil if you notice that the engine oil is on a low level. 

If a low engine oil level has caused engine damage, make sure that you take it to a small engine mechanic to fix it for you.

9. Husqvarna Lawn Mower Not Self-Propelling

Your Husqvarna may not self-propel due to a defective V-belt, bad drive pulley and faulty wheel assembly. Here are some troubleshooting tips to solve the problem:

Replace the Broken or Worn Out V-Belt

If the V-belt is broken or worn out, the wheels of your mower won’t turn. Ensure that you inspect the V-belt and replace it if it is defective.

Change the Broken or Worn Out Drive Pulley

A worn-out or broken drive pulley won’t allow the transmission to engage the wheel assembly. Make sure that you replace it if it is defective.

Replace the Wheel Assembly

If the gears of the wheel assembly are worn out, the transmission won’t be able to engage the wheel assembly. Make sure that you replace the wheel assembly.

Frequently Asked Questions