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Troubleshooting Guide: Reasons Why Your Husqvarna Lawn Mower Won’t Start and How to Fix It

Do you need a professional when you notice your lawn mower won’t start to click? It can be frustrating when your lawn mower is faulty. However, rushing to call an expert is unnecessary when you can handle some underlying issues.

What would be the reason for the faultiness? Lack of air, spark, fuel etc., in the engine, can cause a Husqvarna lawn mower not to start.

In this piece, we discuss the causes behind the malfunctioning of the lawn mower and possible solutions. Without much ado, let’s get started!

Husqvarna Riding Lawn Mower Won’t Start No Clicking

Are you having starting issues with your lawn mower? Check out the below list:

Wrong Gas Type/Stale Gas

A Gas containing higher amounts of ethanol can ruin the Husqvarna engine. Therefore, the suitable gas for such machines is unleaded gasoline which comprises 87 % octane or higher and 10% ethanol.

In other words, the lower the ethanol your fuel has, the better.

Old Gasoline

Usually, the gas has a lifespan of 30 days before it starts to break down and disintegrate. The use of stale gasoline on your Husqvarna Mower will lead to a lot of problems

For instance, due to moisture absorption by ethanol, a mixture forms, settling at the engine’s base during separation and eroding the engine. 

Moreover, the gummy sediments that remain once the evaporation completes can clog the fuel filter, causing improper fuel flow to the carburetor, and making your mower not start.

Solution: The best way to fix this issue is by draining or flushing the tank. Replacing fresh fuel with an additive like Sea Foam is essential to clean the fuel system.

In case of filter blockage, then you will have to replace it.

Empty Gas Tank

Lack of fuel is a common cause that makes your Husqvarna lawn mower not ignite. It may seem simple, but people always forget.

Solution: refill the tank with new/fresh gas and make it a habit to constantly check on the fuel levels each time before you turn on the mower.

Dirty/ Disconnected Spark Plug

If you had maintenance not so long ago, your Husqvarna wires would have been left disconnected.

In addition, your mower’s spark plugs may have oil or carbon buildup on the spark plug, and your mower may have starting issues.

Solution: Examine the spark plug of any carbon buildup. Replace them with a new spark plug(s) for damaged porcelain insulators and ensure they’re adequately gapped.

Gas Cap Not Venting

Another reason your mower may not start is the vacuum preventing fuel from flowing out of the tank due to plugging the fuel cap. As a result of insufficient air, your Husqvarna lawn mower won’t start.

How can you establish a plugged gas cap vent? First, remove the cap and ignite the mower; while it starts running, place the lid back on the fuel tank and allow your mower to run for some extra time. In case it shuts, the cap is the culprit of your problem.

Solution:  Cleaning the cap to open the vent. If it fails, then go ahead and do a gas cap replacement.

Clogged Air Filter

Husqvarna lawn mower can’t operate without air. Therefore, dirty or clogged filters cause the mower not to start engine overheating.


Ensure you keep your filters clean. Regular checkups will save you a lot of expenses. Dirty and damaged filters can prevent smooth airflow to the carburettor leading to the malfunctioning of the Husqvarna lawn mower.

Bad Battery

A dead or lousy battery does cause start-up issues. Remember, batteries don’t give a warning sign, so it is crucial to test them using a voltmeter. However, if you don’t own one, kindly do a basic checkout.

If your option is the voltmeter route, then check out the following

  • 12.65, meaning 100%charged
  • 12.30V is 70% charged
  • 12.05 is 50% charged

For a 12V battery, the voltage should be relatively near 12V. Anything less than 12 may not power the lawn mower because of insufficient juice. 

If your battery is low in voltage, it means the battery is faulty and may fail to charge (completely dead); give it a few minutes to display its charge. So, you will have to replace it if it doesn’t hold a charge.

Bad Husqvarna Safety Switch

For safety purposes, the Husqvarna lawn mower has many designs to protect you from harm, such as Safety switches to prevent it from running on its own. Their malfunctioning may lead to the machine not starting.


Use a multimeter to test the functionality of the switches. Alternatively, you need to identify a bad switch.

Tip: Never should you operate a Husqvarna lawn mower without correct safety switches or bypass

Bad Starter Solenoid/Sensors

Like the on-off switch, the Solenoid is an electromagnetic sensor that triggers the starter motor’s ignition to turn on the engine. 

Also, if there is a wire connecting to the Solenoid, it gets hotter and thus melts or smokes.


There are multiple sensors, however, in varieties like gear level, brake pedal, seat, and brake engage control switch. Etc.   

What is the Procedure for Starting a Husqvarna Lawn Mower?

Here are quick steps on how you can turn on your lawn mower:

  • Assess the battery, oil, gas and spark plug.
  • Put in the ignition key. To start the engine, pull the rope three times
  • Activate the parking mode by pressing the foot brake
  • Set the choke to the top position before igniting the machine.
  • If your model is riding a lawn mower, start by turning the start key and throttle down once it has begun.


Having issues with your Husqvarna lawn mower is easy to troubleshoot without necessarily calling an expert. However, with the troubleshooting guidelines, you don’t have to worry. Follow the proper steps to get it fixed.

Nevertheless, it would help if you were observant while operating the machine, as it can cause fatal injuries. Therefore, ensure you follow every detail of these guidelines!