10 Common Problems With Husqvarna Zero Turn Mowers And Their Fixes!

Key Takeaway

  • Common problems with Husqvarna zero turn mowers occur due to engine malfunctions, the steering control, the hydro-transmission system, broken drive belt, etc.
  • To resolve starting issues, ensure that the fuel is sufficient and fresh. Also, check the fuel pump. If the seams of the fuel pump are falling apart, it will leak fuel.
  • To resolve the hydrostatic transmission problems, change the hydraulic fuel, lubricate the pulleys well, and the drive belt shouldn’t be broken or loose. 
  • If the Husqvarna mower vibrates too much, check for any missing bolts around the engine. Tighten them up and add in new ones if they are missing. 
  • You can resolve steering problems on a Husqvarna mower by maintaining equal pressure in the tires and removing any debris if stuck. 
  • The mower’s blades should be knife-like sharp, and correctly angled. The mower will cut the grass unevenly if they’re blunt or bent. 

Husqvarna zero-turn mowers have been one of the most preferred high-performance lawnmowers for both flat and hilly terrains. This brand is known to manufacture robust and powerful zero-turn mowers that take comfort to another level. 

So, you researched the best zero-turn mowers and wrapped up your search on the Husqvarna zero-turn mower for landscaping your lawn exquisitely. Now, if you faced some problems with Husqvarna zero-turn mowers, you wish you had got another one, but that shouldn’t be the case. 

It is natural for any lawnmower to malfunction after some time, but troubleshooting Husqvarna zero-turn mower problems is straightforward. I will help you learn that in this article. 

Today, I have listed all the possible Husqvarna zero-turn mower problems and their solutions, which will assist you in troubleshooting the mower if any issues occur. 

Most Common Problems With Husqvarna Zero Turn Mowers And Their Easy Fixes

Most Common Problems With Husqvarna Zero Turn Mowers And Their Easy Fixes.

The Husqvarna zero turn mower problems can arise due to poor engine maintenance, the fuel, the carburetor, the fuel filters, etc. 

Look at the list of issues mentioned here and identify them on your Husqvarna zero-turn mower. 

1. Husqvarna Mower Fails to Start

Your Husqvarna zero turn mower would fail to start if there is insufficient fuel, the fuel lines are blocked, the battery has depleted, or the spark plug is damaged. 

Look at the table attached below to understand the causes and the solutions for troubleshooting Husqvarna zero-turn starting problems.


Issues on the mowerReason for the issueSolution 
Stale fuelThe fuel contaminates and becomes stale after some time. It then breaks down, making the fuel system inefficient, and thus, the mower fails to start. Drain out the stale fuel from the tank and pour in new fuel. Also, add a fuel stabiliser to increase the fuel’s efficiency. 
Insufficient fuelNo fuel in the tank.Add rich fuel mixed with a fuel stabiliser in the tank.
Defective Fuel CapIf the fuel cap’s vents are clogged, a vacuum develops in the fuel tank, preventing fuel flow to the engine. Clean the ducts of the fuel cap using a sleek wire. If required, replace the fuel cap.
Damaged Spark PlugThe engine won’t start if the spark plug is defective, dirty, or incorrectly gapped. Change the spark plug to a new one, secure it tightly and refer to the manual for the correct gap specs. 
Defective Fuel PumpIf the fuel pump leaks or bears defects, it won’t build the pressure required for pumping fuel. Change the fuel pump and ensure it does not leak anymore.  
Clogged Carburetor and Fuel LinesThe Carburetor and the fuel lines can become clogged easily due to deposits of stale fuel or dirt, blocking the fuel supply to the engine. To clear out the carb and the fuel lines, use a spray carb cleaner or air compressor pump. If it doesn’t work, change the fuel lines. 
Depleted battery + worn-out battery terminalsThe mower will certainly develop starting problems if the battery is dead, has loose connections or if its terminals are loose or decayed. Start charging the battery, but change it if it’s not charging. Secure the terminal and the connections tightly. 
Broken Safety SwitchThe safety switch is installed in a mower to prevent it from starting accidentally but if it’s broken, the mower won’t start even when you try. First of all, test the switch. Change it if it is broken. 
Defective RecoilIf the mower’s recoil is damaged, it won’t be able to push the engine to start. Inspect the coil’s parts and try if it can be fastened. Replace it if it’s damaged. 

Check all the parts as mentioned above to dissect Husqvarna zero-turn starting problems. All these parts are actively used when you use the mower. That is why they are prone to decay after a point of time. Maintain all these parts, and the mower won’t struggle to start. 

2. Husqvarna Mower Fuel Leakage Issues

As gasoline evaporates quickly into the air, you might detect the leakage much later since there may not be a noticeable damp spot. By then, the fuel tank’s level becomes very low. 

Only when a strong gas smell lurks around the garage will you learn that the fuel has been leaking. Let’s see how such a situation can be prevented and treated.

ProblemReason Solution
Defective Fuel tankIf it’s a metallic fuel tank, it can start to rust, and if it’s made up of plastic, the seams may start breaking down, leaking the fuel.Sometimes, the holes can be fixed, so check if it’s possible. Otherwise, change the fuel tank of the mower.
Defective fuel pumpThe seams of the fuel pump can start falling apart after some time, thus leaking fuel.Replace the faulty fuel pump.
Faulty Shut-off Fuel ValveIt is common for metallic or plastic-made shut-off fuel valves to stop closing tightly after sometime and thus, it starts leaking the fuel. Replace the defective shut-off fuel valve.
Leaking fuel linesThe mower’s fuel lines are made of rubber which can become hard/brittle over time, prone to leaking fuel. Change the fuel lines to new ones if they have cracks or are too brittle. 
Faulty Primer Bulb,The primer bulb’s rubber starts leaking fuel if it is detached from the hose of the fuel or if it bears cracks. If the bulb’s rubber has become too brittle or is leaking, replace the bulb. 
Unsealed Gap CapIf the sealing around the fuel cap is defective, fuel will keep splashing out when the mower is used, reducing the fuel level in the tank.Check the gas cap. Replace it if it is loose or does not seal anymore.

3. Husqvarna Mower Stalls while Running

Along with the issues mentioned above, you may also encounter a situation when the Husqvarna zero-turn mower starts but stalls intermittently. It is quite a common issue on zero-turn mowers and can also be fixed easily. 

Problem ReasonSolution
Defective Cooling finsIf the mower’s cooling fins have oil , dust or dry grass accumulated over it, they will fail to cool the engine down. Thus, the engine overheats and stops working. First, clean the cooling fins of grease, dirt, and grass deposits. However, if they are cracked, replace them with new ones. 
Blockage in fuel linesAgain, debris and gummy fuel residue can block the fuel lines. Then, they are clogged and the fuel supply to the engine is not continuous anymore. Air compression pump and carb cleaner spray can help clear out the fuel lines If nothing works, replace them. 
Inefficient fuelOver time, gasoline breaks down and becomes less efficient, failing to run the engine efficiently. Empty the fuel tank and add in fresh fuel. Add a fuel stabiliser to increase the engine’s efficiency. 
Greasy Carburetor The carburetor becomes affected the most due to gummy leftovers of the fuel. It becomes greasy and reduces the flow of fuel to the engine. Start by cleaning all the parts of the carburetor. If any parts have turned faulty, replace them with new ones. 

4. Husqvarna Mower Starts to Smoke while Running

You should never ignore if your Husqvarna zero turn mower starts smoking as it is a warning sign. This smoke alarms you about issues with the engine, i.e., excessive oil in the tank due to which the engine starts to ‘run rich’ or scorching more fuel as compared to air. This occurs due to the incorrect ratio of air-fuel mix in the engine. 

Faulty Air filtersAs explained above, clogged air filters with dirt and grass restrict the airflow to the engine, causing the engine burn more fuel. Clean the filters but you’ll have to change if they’re broken or worn-out.
Excessive oil in the tankIf there is more fuel in the engine than its capacity. Pressure will build up in the tank and oil will travel to the cylinder via the valve train. Refer to the mower’s manual and reduce the tank’s oil level as per the specified specs. 
Very less oil in the tankLess engine than recommended is equally dangerous for the engine as it doubles up friction in the tank, overheating it. As guided above, refer to the manual to maintain the ideal level of fuel in the tank but get the mower’s engine Inspected at a repair shop as a case of less oil can damage the engine internally. 
Faulty Piston Ring, gasket or the valve assembly If you operate the engine with low level of oil, it can adversely affect the engine’s internal parts like the piston ring, gaskets and the assembly of the valves. Get the mower inspected at a nearby repair shop to get it checked internally. If any of the parts have worn out, replace them with new ones. 

5. Husqvarna Zero turn Hydraulic Problems;

When the hydraulic fuel in the mower becomes stale or degrades, it directly affects the hydrostatic transmission system of the mower. Due to the deteriorated hydraulic fuel, you may encounter Husqvarna zero turn hydrostatic drive problems. Let’s learn how they can be fixed. 

Broken drive beltIf the drive belt is damaged, it will restrict the pump from working properly. Check the belt and if it is broken or cracked, replace it.
Defects in pulley systemAn issue with the pulley system will fail to provide friction to the belt, thus failing the hydrostatic transmission system. Lubricate the arms of the tensioners and change the pulleys if they’re worn-out.
Bad hydraulic fuel Fresh and efficient hydraulic fuel is necessary to keep the hydro system well-lubricated which is needed for the hydro system to work correctly. As recommended by Husqavarna, keep changing the hydraulic fuel regularly. Ensure that the level of hydraulic fuel is optimal in the tank. 

6. Husqvarna Zero turn Steering Problems

It might become a tough task to steer the Husqvarna zero turn mower smoothly if the connected parts like the deck and the tires have an issue. 

Learn the methods to troubleshoot Husqvarna zero turn steering problems with the detailed explanation given below. 

Inaccurate pressure in the tiresThe pressure in the mower’s tires can increase or decrease when the mower is used regularly. Unbalanced pressure in the tires makes it tough to steer the mower freely. Check the pressure in the tires and maintain equal pressure as per Hussqvarna recommendations.
Faulty zero turn dampersIf the mower’s dampers are faulty, you will find it tough to move the mower from one side to another with ease. Check the dampers and change them if required. 
Incorrect adjustment of zero turn tracking If the mower’s one tire moves fast and the other one is sluggish, the mower will keep pulling to the faster side, making it tough to steer it. Modify the speed of adjustment rivets to adjust the tire’s speed of rotation. Adjust precisely as per the mower’s manual.
Wobbly components of the steering system While the mower is used regularly, the washers, the gearing assembly and the bushings wear out too, weakening the steering system of the mower. Check all these parts closely and change them if they’re in dilapidated condition. 

7. Husqvarna Zero turn Belt Problems

Regular usage and rust can affect the drive belt of the mower resulting in common Husqvarna zero turn belt problems. With time, the tension in the belt also becomes less which prevents it from working and can affect the hydrostatic transmission system of the Husqvarna zero turn mower. 

Debris stuck around tensioner and pulleysJunk can accumulate in the mower’s deck, surrounding the pulleys. Then the belt cannot move freely which ultimately makes the belt loose since it does not receive tension and it starts vibrating.  Remove the deposited traces of junk thoroughly from the deck and thereafter, wipe the belt clean with a dry cloth. 
Oil on the drive beltIf there is oil leaking on the Husqvarna mower, it can come over the belt. In that case, the belt will slip over pulleys and detach from the deck. If your mower is leaking fuel, use the solutions given in the previous steps to fix it. Then, wipe the belt out if it has any oil on it. 
Corroded pulleysWasted and rusted pulleys dry the drive belt of the mower. Lubricate the pulleys adequately but if any of them is corroded or rusted, change them. 
Faulty belt keeperThe pulleys in the mower have a rod inside them to keep the belt snugly in place. If the belt’s slack keeps hitting them, the rod can break, slipping the belt from the deck. Use a set of Vice-Grips to curve the rod correctly.  

8. Husqvarna Mower Fails to Move

You would face difficulties in moving the Husqvarna zero turn mower if the drive belt is broken, the spring of the tensioner is loose or misplaced, hydraulic fuel is less or the blades are jammed. Learn more about these issues below. 

Incorrect position of the level for drive releaseIf the lever of the drive release isn’t positioned correctly, Husqvarna mower which is a hydrostatic mower, fails to move. Check the lever of the drive release and ensure that it is well-functional and correctly positioned. 
Misplaced axle key and spring of idler armThere is a small axle key and a spring on the idler arm on the mower which if misplaced, restricts the mower from moving.If there is no axle key, get a new one. Check the spring of the idler arm and replace it if it’s not present. 
Broken drive belt/pulleysAs quoted above, bad drive belts or rusted pulleys won’t let the mower move. If the drive belt is broken, change it to a new one. Lubricate the pulleys and ensure that the belt is secure around pulleys. 
Poor hydraulic fuelPoor quality of hydraulic fuel will not lubricate the hydraulic system, making it weak.Change the hydraulic fuel regularly on the Husqvarna mower as recommended. 
High temperature of hydraulic fuel If you pour in very hot hydraulic fuel into the mower, it can destroy  the hydro-transmission system of the mower.Always add in hydraulic fuel when it’s cold. If you poured in hot fuel, it might have damaged the mower’s system. So, get it checked at a repair shop. 
Air trapped into the hydraulic transmission systemIf air makes way into the hydraulic system of the mower, the mower won’t be able to move at fast speed. If air is trapped into the fuel, drain the fuel and add in fresh hydraulic fuel. Refer to the manual for learning to eject air from the mower’s system. 

9. Husqvarna Mower Vibrates Excessively

The Husqvarna mower can start vibrating if some parts are misplaced, junk is stuck under the deck or is encased around the spindles, bad clutch, imbalanced blades of the mower etc. 

Misplaced bolts of engineIf any bolts of the engine are loosened up, the mower will shake loudly when it starts. Check all the bolts of the engine and tighten them properly. If any of them is misplaced, replace them. 
Faulty Clutch systemIf the clutch bearings fail, they get detached from the clutch system, causing the mower to vibrate. Check the PTO Switch, the PTO Clutch but if the clutch is not working, change it to a new one. 
Incorrect balance of bladesIf the blades are angled incorrectly or are defective or flawed, they send vibrations through the mower, shaking it up.Check that none of the blades are bent, chipped off at the edges and are at the correct angle. Clean the blades after each mowing session. 
Jammed spindles of bladeIf any external material like weeds, loose strings etc are stuck around the shafts of the blades, this will create vibration in the mower. Check the bottom area of the deck and pull out all the stuck debris from the shafts of the blades. Also, check if the spindles are defective. 

10. Husqvarna Mower Cutting in Uneven Patterns

If your Husqvarna zero turn mower has started cutting the grass in uneven and asymmetrical patterns, it is directly related to the blades. Let’s see how you can fix this.

Incorrectly installed bladesThe blade’s installation is incorrect if the bearings of the spindles are curved. It can damage the deck’s shell. Check the blades and install them correctly. 
Crooked or curved edges of the bladesIf the corners of the blades are curved, the mowing pattern will be uneven. Replace the blades if they are curved at the edges. 
Debris stuck in the deck If there is debris stuck under the deck, the blades will move in a restricted manner and cut unevenly. Clear out the mower’s deck of any stuck debris. 

Note: All the above mentioned problems on a Husqvarna zero turn mower can be prevented in the first place, by maintaining the mower’s engine system, the hydrostatic system and the condition of the fuel on a regular basis. 

Frequently Asked Questions

Q1. How many hours does a Husqvarna zero turn mower last?

Answer – The Husqvarna zero turn mowers are especially designed for yards of small size. On an average, a Husqvarna zero turn mower works great for about 400-500 hours. They are most suitable for smaller loads of work. 

Q2. How does a Husqvarna hydrostatic transmission system work?

Answer – The hydrostatic transmission system of a Husqvarnz zero turn mower makes use of hydraulic oil, with pressure for starting the mower’s engine. The pump pressurises the oil inside the system of transmission. If air manages to get into the fuel lines, the pump will try to pressurise it to prevent the failure of the mower’s hydrostatic transmission system. 

Q3. Which kind of fuel is best for a Husqvarna zero turn mower?

Answer – The best kind of fuel for hydro-gear transmission is the 20W-50 motor oil and the 15W-50 synthetic motor oil. You can find the machine reservoirs on these mowers, placed behind the driver’s seat to one frame. 

Q4. Which fluid is used in the hydrostatic transmission of a Husqvarna zero turn mower?

Answer – The Husqvarna zero turn mower requires a 10W/30 hydro-transmission oil with a modifier of friction. It is especially curated for the Husqvarna AWD zero turn mowers. 


Resolving issues on a Husqvarna zero turn mower isn’t an intimidating task. Almost all the issues that can occur on a Hysqvarna mower can be easily resolved and this article will help you till the very end to do that. 

It may seem so but maintaining the zero turn mower is no child’s play. As you learnt above, you must keep a regular check on the hydraulic fuel, the carburetor, the filters, the blades etc to enable a Husqvarna to mow your lawn perfectly. I am sure you won’t be stuck with a non-functional Husqvarna zero turn mower after reading this composition. Also, share this with family and friends to help them as well, learn about troubleshooting a Husqvarna zero turn mower. Have a great time mowing!

1 thought on “10 Common Problems With Husqvarna Zero Turn Mowers And Their Fixes!”

  1. The 48” mower does not allow for proper deck height. Full height adjustment is about 3-1/2” when lever is at 6”. And then the deck is hitting the bottom of the frame.
    The dealer did not mention this when I bought it.


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