14 Causes of a Husqvarna Zero Turn Not Starting and Passing Away: SOLVED

Suddenly, while you were mowing, your mower turned off. This is often brought on by a deficiency in air, fuel, or spark, or it might be the result of a wire or component that has become loose. Use the list that I’ve provided below to help you determine what the problem is and how to solve it so that you can go back to mowing.

When there is a restriction in the fuel system, such as because of old gas, a stopped fuel filter, a clogged fuel line, a malfunctioning fuel pump, a filthy carburetor, or a plugged gas cap, a Husqvarna zero-turn will start, but it will not continue running for long.

It is also possible for it to stop working because the spark plug is unclean, the ignition coil is broken, the air filter is clogged, the choke setting is incorrect, the cooling fins are clogged, the engine oil level is incorrect, or the mower deck is clogged.

Be sure to observe all of the safety instructions that are included in your Husqvarna operator’s handbook. Before beginning repairs, take out the key to the ignition and disconnect the spark plug wires.

outdoorstip Husqvarna Zero

Causes of a Husqvarna Zero Turn Not Starting, Stalling, or Passing Away

1. An issue with stale or contaminated fuel in a Husqvarna zero-turn mower

As soon as a month after purchasing, gasoline may start to lose its quality. The ethanol that is included in the majority of gasoline works as a magnet, drawing moisture into the fuel system. This moisture may then leave behind sticky deposits and varnish that coats fuel components.

If this occurs, the Husqvarna zero-turn mower you own may suffer from a fuel limitation that makes it run poorly before eventually causing it to stop working altogether.

SOLUTION : Make sure there is still petrol in the tank. You will need to dump the gasoline tank if it has been sitting there for more than thirty days without an addition to help keep it stable for a bit longer.

Always use freshly purchased gas in the mower. Husqvarna zero-turn mowers need for unleaded gasoline with an octane value of at least 87 and a maximum of 10% ethanol content in the fuel. Here you may learn more about selecting the right gas for your Husqvarna mower.

Mixing the gasoline with a fuel additive such as Sea Foam Motor Treatment keeps the fuel stable, reduces the amount of moisture it contains, and cleans the fuel system before adding it to the fuel tank.

You may learn more about its benefits by reading the article titled “Put Sea Foam Fuel Additive in a Lawn Mower to Stabilize Gas.”

After thoroughly combining the fuel and additive, put the resulting mixture into the fuel tank. Turn on the zero-turn mower and give it approximately 15 minutes of running time before stopping it to enable the mixture to work its way through the system.

2. The fuel filter on a Husqvarna zero-turn mower was clogged with debris.

If the gasoline filter gets clogged with dirt to the point that it no longer permits fuel to travel through it, your engine will stop working because it will not have enough fuel.

SOLUTION: A clogged gasoline filter should be swapped out for a fresh one. While you are putting in the filter, you need to make sure that the arrow that is printed on the housing of the filter is pointing in the direction that the fuel will flow.

3. The Husqvarna Zero Turn Mower Suffers from Clogged Fuel Lines

When you use gasoline that is over its expiry date, one of the things that may go wrong is that the fuel line could become clogged up. This is one of the possible bad results. The goopy material has a possibility of collecting in the line, which will lead to a decrease in the quantity of space that is accessible for gasoline and will therefore make the line less efficient.

In the event that the fuel line for your Husqvarna zero-turn mower gets clogged for any reason, it is possible that the mower may become unusable as a result. Because of this, the lawn mower would not be able to receive the necessary amount of fuel.

SOLUTION: You should start and stop the flow of gasoline using the fuel shut-off valve while examining each portion of the fuel line for fuel flow. This will ensure that the fuel line is functioning properly. You will be able to discover any obstructions in your gasoline lines using this method.

If you find an obstruction in the fuel line, disconnect the gasoline supply and remove the fuel line from the zero-turn, then restart the engine.

Cleaning solution for the carburetor should be sprayed into the fuel line. The aim of this is to dismantle the impediment so that we may proceed. Following this, you should go on to removing the blockage by pushing pressurized air through the line in the manner previously described.

If you are unable to remove the blockage so that the gasoline line can be opened, you will need to replace the fuel line with a new one that has the same length as the old one and the same diameter. Turn on the supply of fuel to your car.

4. A Husqvarna Zero Turn Mower with a Defective Fuel Pump

On the majority of Husqvarna zero-turns, you’ll find a vacuum pump. In order to transport gasoline to the carburetor, it makes advantage of the vacuum that is created by the engine block. A gasoline pump might malfunction or deteriorate from running old fuel.

SOLUTION: Checking the flow via the fuel line will allow you to establish whether or not fuel is reaching the fuel pump, which is the first step in diagnosing a faulty fuel pump. It’s possible that you completed this task in the stage before.

Secondly, examine the rate at which gasoline is expelled from the fuel pump. Stop the flow of gasoline into the engine and disconnect the fuel line from the carburetor. After inserting the line into the container, activate the fuel flow and begin the zero-turn maneuver.

Keep an eye out for a consistent or pulsing flow of gasoline coming out of the line; this will indicate that your pump is functioning properly. You should replace the gasoline pump if you are not getting a sufficient flow.

5. Dirty Carburetor on a Husqvarna Zero Turn Mower

A carburetor is necessary for the gas-powered Husqvarna zero-turn mower you own because it allows you to control the quantity of fuel that is combined with air for combustion.

The use of stale gas is often to blame when a carburetor breaks down. It leaves behind varnish, which may either block the fuel pathways or cause the internal elements of the carburetor to cling together.

You won’t be able to keep your Husqvarna engine running if it doesn’t get the proper quantity of gas.

Do the following simple tests to establish whether or not the issue is inside your carburetor before you proceed to remove and clean it:

  • Check to see whether there is gasoline flowing into the carburetor. If you check the fuel flow coming out of your fuel pump, you should have been able to verify this already.
  • Take off your air filter from its housing and set it to the side.
  • Start your mower after spraying carburetor cleaning into the air intake of the machine. (Don’t use starting fluid).
  • If the Husqvarna starts up and seems to be running OK for a short while, but then begins to bog down and eventually turns off, the carburetor may be the source of the issue.

SOLUTION: Take the carburetor off of the Husqvarna zero-turn mower you have. Take it apart and make sure the carburetor is well cleaned. For instructions on how to clean your Husqvarna carburetor, refer to the accompanying guide.

If you decide to have someone else do this task instead of you, you should take your mower to a company that repairs small engines.

6. An obstruction in the air filter of a Husqvarna zero-turn mower

Air is one of the things that is necessary for the operation of your engine. If the engine on your Husqvarna zero-turn mower started running more slowly than usual or cut out altogether while you were mowing, the issue might be a clogged air filter.

As a result of the dusty circumstances that zero-turns generate, the air filter has the potential to accumulate so much dirt that it prevents a sufficient quantity of air from passing through it.

If you want to maintain the cleanliness of your air filter, you should clean it many times throughout the mowing season and replace it once a year. Whether you are using the mower in very dusty circumstances or for commercial reasons, you will need to clean it more regularly.


To clean a Husqvarna zero-turn paper air filter, the following procedures should be followed:

  • Take off the paper element of the air filter from the housing for the air filter. Take extra precautions to ensure that dust does not get into the air intake.
  • Use a clean, dry cloth to remove any dirt that may still be present in the housing.
  • Tap the filter against a hard surface in order to knock as much dirt as possible out of the filter so that it may be removed. You shouldn’t use compressed air since doing so can ruin the paper component.
  • Display your filter by holding it up to a light. If the light is not shining through the paper element, your filter may be broken, or it may be coated with oil; in either of these cases, you should replace it with a new filter. If it is still in excellent shape and you can see light through it, you should feel free to reuse it.
  • After installing the air filter, be sure you connect the cover to the filter housing.

7. A Husqvarna zero-turn mower’s engine cooling system and fins were clogged with debris.

It is necessary to maintain a cool temperature in the engine block as well as the cylinder heads in order to avoid the engine from overheating and shutting down. At the very top of the engine is where you will discover a fan that is placed. This fan draws air into the engine, which helps to keep it cool.

If the fins on this fan get clogged or broken, they will need to be cleaned, and any damaged fins will need to be replaced. In addition to the fins, clean up the air channels and remove any dirt and debris you find there.

SOLUTION: You should clean your cooling fins thoroughly and repair any that are cracked if you discover any dirt there. Cleaning the area surrounding the engine block and the shroud that surrounds it should be a priority.

Check that the heat shield you’re using has been appropriately placed so that it doesn’t restrict airflow.

8. A Husqvarna Zero Turn Mower with an Inadequate Amount of Engine Oil

Before each time you use your Husqvarna zero-turn mower, you should be sure to check the amount of motor oil in it. This step is skipped by many people who own mowers. It doesn’t take very long to use the oil dipstick to determine whether or not the engine needs more oil.

If you find a low engine level before it causes harm to the engine, you may save yourself from having to pay for expensive repairs. When you operate your zero-turn mower with a low engine level, you run the risk of the mower overheating and shutting off.

Since there is not enough engine oil to lubricate the internal engine components, there will be more friction between the parts, which will cause the crankcase to get hotter. This extreme heat has the potential to start the engine burning oil and other components.

SOLUTION: If you are having trouble starting your lawn mower because the engine has a low level of oil, you may try adding additional oil to the engine in an effort to get it up to the proper level so that the mower will start.

This simple solution of adding additional engine oil is not going to be successful the vast majority of the time since the Husqvarna failed to start because there was insufficient lubrication.

It is quite probable that the engine sustained serious damage. To get an accurate assessment of the kind of damage that has been done to your mower, it is advisable to have an expert small engine technician have a look at it.

A local Husqvarna service facility or an engine dealer service center that specializes in the make and model of the engine that powers your zero-turn mower is a suitable location to take the engine for an inspection. It’s possible that this is an engine made by Kawasaki, Kohler, or another brand.

9. A Husqvarna Zero Turn Mower with Excessive Amounts of Engine Oil

It is possible that you are unaware that pouring an excessive amount of engine oil to the crankcase might result in an increase in crankcase pressure, which in turn can cause the engine to shut down.

The following issues may manifest themselves in a Husqvarna machine if the engine receives an excessive amount of oil:

  • It is possible for the engine to overheat and smoke.
  • Broken or damaged seals
  • blown gaskets and seals
  • Hydrolocked engine

Not only does having little engine oil have the potential to kill the engine, but having an excessive amount of engine oil may also cause your zero-turn to shut down.

The crankcase will experience increased pressure if there is an excessive amount of oil. You can learn more about the consequences of using an excessive amount of oil in a Husqvarna here.

SOLUTION: After checking the amount of the engine oil in your vehicle, if you discover that the level is too high, take out a tiny bit of the oil.

With either an oil evacuator or a turkey baster, oil may be extracted from the drain plug, the oil filter, or the location where oil is filled. Repeat the process of draining and refilling the engine oil until the right level is reached.

10. A Husqvarna Zero Turn Mower with an Unclean Spark Plug or Loose Connectors

Your Husqvarna zero-turn mower can stop running if the spark plug is clogged up. Check to see if the spark plug in your mower is dusty or if the spacing between the electrodes is off. A slow or non-functioning mower may also be the result of spark plug wires that are too loose.

SOLUTION: If your spark plug is filthy, you should take it out of the engine and clean it. Replace the spark plug with a new one if it has a particularly dark color or if it seems to be damaged.

Ensure that it is gapped appropriately in accordance with the specifications provided by the manufacturer of your engine, and that the spark plug wires are fastened firmly.

11. A Husqvarna Zero Turn Lawnmower with a Defective Ignition Coil

When the temperature of your mower reaches a certain point, the winding on the ignition coil may separate and cause a short. When this occurs, the spark plugs are unable to get the voltage they need to produce a spark, and the engine will not start.

When it has been operating for some time, this may cause the lawn mower to stop working.

SOLUTION: Checking using an ohmmeter for a break in continuity is the method for determining whether or not an ignition coil is defective. If you notice a break in the ignition coil, you will need to replace it.

12. The Choke on a Husqvarna Zero Turn Mower is at the Incorrect Position

If you use the choke on your Husqvarna zero-turn mower, you may limit the quantity of air that goes into the carburetor, which in turn allows for a greater concentration of fuel to be allowed into the combustion chamber.

When the engine is cold, you must need this in order to start it. If you do not release the choke once the engine has reached operating temperature, your zero-turn will not turn since the engine need more air to continue operating.

SOLUTION: Check that the lever for the choke is in the appropriate position. To start a cold engine, the choke must be in the “on” position, which is closed, and then it must be changed to the “off” position, which is open, after the engine has warmed up.

13. A Husqvarna zero-turn mower with a faulty gas cap

The design of the gas cap is such that it permits air to flow through the cap. This is done so that the gasoline tank can breathe properly. If the vent in the cap stops functioning, the gasoline tank will create a vacuum that will prevent gas from escaping the tank and will prevent the tank from venting.

Even if your Husqvarna zero-turn mower may have started up due to a faulty gas cap, it will switch off after it has been running for some time. This is due to the fact that if air is prevented from passing through the cap, a vacuum will be created within the tank.

SOLUTION: Loosening the fuel cap to let air into the fuel tank and seeing how the engine of the lawnmower responds will help you identify whether or not the fuel cap is defective.

If it does, you should tighten the cap and then try to reproduce the issue by operating the mower for a bit to see whether it starts to run slowly or shuts off again. If you are successful, you should then tighten the cap again.

Replace a faulty gas cap.

14. A Husqvarna zero-turn mower with a plugged-in mower deck

It’s possible that a clogged mower deck can force your engine to work harder, cause it to overheat, and cause it to shut off.

As grass builds up beneath the deck of your mower, it puts additional pressure on the engine since the engine must then operate the blades while the deck is full of debris. The issue might become much more severe if the mower blades are dull.

SOLUTION: Always make sure to scrape the deck of the mower and sharpen the blades of the mower. Not only will maintaining the deck of the mower clean and the blades sharp help to lessen the amount of strain placed on the engine, but it will also help you achieve a clean cut.

The blades and the region beneath the deck work together to generate air movement, which lifts the grass and allows the deck to cut it.

What may be preventing the battery from charging on my Husqvarna zero-turn lawn mower?

While using the zero-turn mower, you must remember to maintain the engine speed at a high setting at all times. Never keep your lawnmower running when it is in the idle mode for a lengthy period of time. The power of the engine is what you need in order to provide your battery a charge when you wish to.

You may get a summary of the several causes that might be causing your battery to die in the article titled “Husqvarna Lawn Mower Battery Keeps Dying,” which can be found on this website.

If you have confirmed that the battery as well as the wire are in great condition and that they are fastened securely, but you still find that you need to charge the battery on a frequent basis, there may be a problem with the charging mechanism.

Solution: This article will walk you through some of the measures you can take to examine the status of your battery as well as the charging system that is connected to it. If, after carrying out these tests, you discover that your battery is defective, you should get a new battery.

In the event that you discover that the charging system is not functioning properly, it is strongly suggested that you have an expert technician diagnose and fix the issue.

If you don’t know how the charging system works, you may just start throwing parts at it in the hopes that one of them will fix the problem. But, since there are so many components that might cause the charging system to fail.

Electrical components may get rather expensive, and since they are electrical parts, it is highly unlikely that they would be accepted for return.