9 Common Husqvarna Lawn Mower Problems & Solutions
You did your research and chose Husqvarna as the best mower for you and your yard. Husqvarna is a well-known brand with good dealership support.
Now that you are having problems with it, you are second guessing your choice. You shouldn’t. No matter what type or brand of mower you buy, you will develop problems.
I’m going to go through the most common type of problems you may be experiencing with your Husqvarna. You can find more detailed information to troubleshoot and repair these problems by following the links in each section.
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Follow all safety instructions provided in your equipment operator’s manual prior to diagnosing, repairing, or operating.Consult a professional if you don’t have the skills, or knowledge or are not in the condition to perform the repair safely.
The most common Husqvarna lawn mower problems are:
- Husqvarna doesn’t start
- Husqvarna dies while mowing
- Husqvarna is smoking
- Husqvarna has a weak hydrostatic transmission
- Husqvarna won’t drive straight or steer correctly
- Husqvarna won’t move
- Husqvarna is shaking or vibrating
- Husqvarna is cutting uneven
- Husqvarna is leaking gas
Table of Contents
Husqvarna Mower Problem 1: Mower Won’t Start
Your Husqvarna mower may not start because the engine is not able to get the air or fuel it needs to run due to a restriction in the air or fuel system. A bad battery, loose terminals, failed safety switch and a faulty charging system can also prevent your mower from starting.
Detailed information can be found at:
Husqvarna Lawn Mower Won’t Start: Solved!
| Cause | Reason for Problem | Solution |
| No gas in the fuel tank | Fuel tank is empty | Fill with fresh fuel |
| Bad or old fuel | Fuel breaks down overtime making your fuel less efficient and prone to clogging the fuel system. | Drain the fuel tank and fill it with fresh fuel. Use a fuel additive like Sea Foam to stabilize the fuel and assist with cleaning the fuel system. Use the right fuel. |
| Faulty or clogged fuel cap | The vent in the cap can get clogged causing your tank to form a vacuum restricting fuel flow. | Use a thin piece of wire to try to clear the clogged vent. Replace the cap if needed. |
| Bad spark plug | Excessively dirty or broken spark plug; bad connection; not gapped correctly. | Replace with a new spark plug, secure connections, and ensure it is gapped to manufacturer specifications |
| Plugged air filter | Dirt and grass can plug the air filter preventing airflow. | Remove the filter and clean it. Replace the filter if it is in bad condition. |
| Plugged fuel filter | A dirty fuel filter will restrict fuel flow. | Replace the fuel filter. |
| Bad fuel pump | A failed or leaking fuel pump will no longer create the pressure needed to pump fuel. | Replace the fuel pump |
| Blocked fuel lines | Bad fuel deposits and dirt can build up and clog the fuel lines preventing the engine from getting the required fuel. | Use a carb cleaner and compressed air to clear the clog out of the fuel line. Replace the line if necessary. |
| Dirty carburetor | The carburetor can become dirty and clogged due to bad fuel and ethanol deposits preventing fuel flow. | Clean the components making up the carburetor. Replace if needed. |
| Bad battery or loose & dirty terminals | A dead battery, loose cables, or corroded terminals can cause starting problems. | Charge your battery and replace it if it won’t hold a charge. Make sure your cables are tight and clean the corrosion from terminals. |
| Bad safety switch | Safety switches are a safety measure that exists to prevent your mower from starting in certain situations. When a switch fails, your mower may not start. | Test and replace faulty safety switch. |
| Bad ignition switch or coil | Your mower will not start when either the ignition switch or coil is bad. | Test and replace a bad switch. |
| Broken recoil | A pull start mower may have a damaged or broken recoil preventing the recoil to initiate starting your engine. | Check the recoil to see if it can be restrung or if broken parts, like the pulley, can be replaced. Replace the recoil assembly if needed. |
Husqvarna Mower Problem 2: Mower Loses Power and Dies
Your Husqvarna lawn mower may die while mowing when your fuel system or air filtration system is clogged. This could be from a plugged air filter, a dirty carburetor, or bad fuel.
You’ll also want to take a look at everything that may be failing to keep your engine cool like dirt and grass packed around the engine or broken cooling fins.
Detailed information can be found at:
Why Your Husqvarna Mower Dies While Mowing
| Cause | Reason for Problem | Solution |
| Bad fuel | Fuel breaks down overtime making your fuel less efficient and prone to clogging the fuel system and engine damage. | Drain the fuel tank and fill it with fresh fuel. Use a fuel additive like Sea Foam to stabilize the fuel and assist with cleaning the fuel system. |
| Plugged air filter | Dirt and grass can plug the air filter preventing airflow. | Remove the filter and clean it. Replace the filter if it is in bad condition. |
| Dirty or broken cooling fins | Cooling fins get packed with dirt, oil, and grass not allowing air to effectively cool the engine block. | Replace broken fins and clean the cooling fins. |
| Clogged fuel lines | Bad fuel deposits and dirt can build up and clog the fuel lines preventing the engine from getting the required fuel. | Use a carb cleaner and compressed air to clear the clog out of the fuel line. |
| Dirty carburetor | The carburetor can become dirty and clogged due to bad fuel and ethanol deposits preventing fuel flow. | Clean all of the components making up the carburetor. Replace if needed. |
Husqvarna Mower Problem 3: Lawn Mower Smokes
Smoke coming from your Husqvarna mower can be alarming. Smoke can develop when your engine is running too rich and you’re burning off more fuel than air.
Another reason you may notice smoke is when is engine oil is burning off due to an oil leak, insufficient oil level or an internal engine problem.
Detailed information can be found at:
Why Your Husqvarna Lawn Mower is Smoking
| Cause | Reason for Problem | Solution |
| Plugged air filter | Dirt and grass can plug the .air filter preventing airflow | Remove the filter and clean it. Replace the filter if it is in bad condition. |
| Too much oil in the crankcase | Excessive oil can cause pressure to build in the engine allowing oil to get into the cylinder through the valve train. | Drain a little engine oil until it is at the manufacturer’s recommended oil level. |
| Engine oil level is too low | Lack of oil can increase friction in your engine causing extreme heat. | Bring to a small engine repair shop to inspect engine damage. You can try adding oil, but it is often too late to this fix your engine problem. |
| Internal problems including the piston ring, valve train or engine gasket | Internal engine problems can have a detrimental effect on your mower if they are not caught soon enough and fixed. | Bring your Husqvarna to your local small engine repair shop for troubleshooting. |
Husqvarna Mower Problem 4: Weak Hydrostatic Transmission
Husqvarna lawn mowers with a hydrostatic transmission may experience a weak transmission when the hydraulic oil is low or old. A bad hydro belt or pulley can also make your transmission seem like it weak.
Note: Some transmissions are non-serviceable. This means you are unable to change the hydraulic oil because the system is sealed. Bring your mower to your local lawn mower repair shop or Husqvarna dealership when you have problems with your hydraulic system.
| Cause | Reason for Problem | Solution |
| Bad drive belt | A bad drive belt can cause your pump not to work efficiently. | Replace a frayed, cracked, or worn belt. |
| Bad tensioner pulley | When a tensioner pulley fails, it fails to keep tension on the drive belt. | Replace the pulley and grease the tensioner arm. |
| Low or old hydraulic oil | Low or old hydraulic oil can fail to lubricate the hydraulic system causing your hydraulic system to seem weak. | Change your hydraulic oil at regular intervals as recommended by Husqvarna. Check your hydraulic oil periodically to ensure your hydraulic fluid is full. |
Husqvarna Mower Problem 5: Mower Won’t Drive Straight or Steer Correctly
Several items can affect your Husqvarna mower’s steering including incorrect tire pressures and worn steering components. The tracking may be off on Husqvarna zero turns causing the mower to veer off to the right of left.
| Cause | Reason for Problem | Solution |
| Incorrect tire pressure | Unequal tire pressure can cause your mower to pull to one side. | Check tire pressures and keep them filled to the manufacturer’s spec. Tires on each side of your mower require equal pressure. |
| Bad dampers on zero turn | Bad dampers will cause your mower to jerk to one side when moving forward. | Replace with a new damper. |
| Tracking adjustment needed on zero turn | When one tire is moving faster than the other, your mower can pull to one side. | Adjust the speed adjustment bolt to change the rotation speed of the tire. Refer to your owner’s manual. |
| Worn or loose steering components in riding mower | Worn bushings, washers, and gears can cause your mower to not steer one way or the other. | Inspect and replace the parts that failed on your steering system. |
Husqvarna Mower Problem 6: Lawn Mower Won’t Move
A Husqvarna mower may not move because you have a bad drive belt, a broken tensioner spring or the tensioner pulley is worn. You may have a low hydraulic oil level.
Some Husqvarna mowers have sealed hydraulic systems so you are not able to service them. If you have any problems, you should bring it to your Husqvarna dealership.
Hydrostatic transmissions are used in Husqvarna’s riding mowers and zero-turn mowers, however, there are different procedures and steps to servicing each type. Refer to your owner’s manual for details on caring for your hydraulic system,
Detailed information can be found at:
This is Why Your Husqvarna Mower Won’t Move or Go Forward
| Cause | Reason for Problem | Solution |
| Drive release lever in the wrong position | The drive release lever allows hydrostatic mowers to roll freely. | The drive release lever must be in the operating position. |
| Missing key in the axle | Your riding mower may have a small key in the axle that may have fallen out of place. | Replace the key in the axle. |
| Drive pump belt is worn | The mower won’t move if your drive belt has fallen off. It could also not move if the belt is worn. | Replace a worn or cracked belt. Make sure the belt is securely around the pulleys. |
| Bad tensioner pulley | The bearing in the tensioner pulley can fail. | Replace the tensioner pulley. |
| Missing idler arm spring | If the idler arm spring breaks or goes missing, it can no longer place tension on the drive belt. | Replace the broken or missing spring. |
| Low or old hydraulic oil | Low or old hydraulic oil can fail to lubricate the hydraulic system causing your hydraulic system to seem weak. | Change your hydraulic oil at regular intervals as recommended by Husqvarna. Check your hydraulic oil periodically to ensure your hydraulic fluid is full. |
| Hot hydraulic fluid | Hot hydraulic fluid can be a sign of damage to your hydrostatic transmission system. | Let your hydraulic oil cool. If you find your mower runs fine when it is cold, but becomes weak when the hydraulic system gets hot, have your mower checked at your local Husqvarna dealership. |
| Air in the hydraulic system | Air must be bled from the hydraulic system after changing your hydraulic fluid or the mower will not be able to move at normal speeds. | Follow Husqvarnas procedures for changing the hydraulic fluid and bleeding air from the system in your owner’s manual. |
Husqvarna Mower Problem 7: Mower is Vibrating
There are many reasons why your Husqvarna mower may be shaking. You could have some missing or broken parts or it could be from debris that is stuck under your pulleys or wrapped around your spindles.
It’s important to look your mower over closely as the littlest items can cause a big vibration.
Detailed information can be found at:
Fixed! Your Husqvarna Mower Vibrating Problem
| Cause | Reason for Problem | Solution |
| Loose or missing engine mounting bolts | Engine bolts are used to reduce the vibration of the mower when the engine is running. | Secure engine bolts and replace any missing bolts. |
| Clutch is bad | When there is bearing failure and it falls out of the clutch it can cause vibration. A manual engagement clutch can have a bushing and linkages that can fail. | Replace the clutch. |
| Unbalanced or damaged mower blades | Damaged and unbalanced blades can send a vibration through your mower. Blades must be balanced before installing. | Replace any damaged blades and make sure they are balanced. |
| Material wrapped around the blade spindle | Foreign materials like string or long weeds can get wrapped around your blade shaft causing vibration. | Remove all debris and items wrapped around the blade shaft. Check for spindle damage. |
| Bad spindle housing bearings | Vibration can be caused by a bad bearing in the spindle housing. | Replace the bearing in the spindle housing or replace the whole spindle housing assembly. |
| Worn pulleys or deck belt | Check deck belt and pulleys for wearing of the belt and bearing failure in the pulleys | Replace any damaged or worn belts and pulleys. |
| Debris lodged in mower | The smallest little things can cause your Husqvarna to excessively vibrate. Check over your mower for debris stuck in the deck or mower. Don’t overlook the small stuff. | Check over your mower deck and mower for any place small items can be stuck in your mower. Remove these foreign materials. |
Husqvarna Mower Problem 8: Mower Has a Bad or Uneven Cut
An uneven cut with your Husqvarna mower isn’t always a problem in the mower deck. It can be something as simple as a low tire that can make you’re your mower not sit level. Always check the tire pressure first and then move on to looking at your mower deck.
Detailed information can be found at:
12 Reasons Your Husqvarna Mower Cuts Uneven
| Worn mower blade | Uneven tire pressures | Engine speed is too low |
| Bent mower blade | Unleveled mower deck | Ground speed is too fast |
| Blade installed wrong | Bent blade spindle or spindle bearing | Damaged deck shell |
| Clogged Mower Deck | Worn deck pulleys or belt | Operator error |
Husqvarna Mower Problem 9: Mower is Leaking Gas
It can be hard to find fuel leaks in your Husqvarna because fuel evaporates into the air. By the time you realize you have a leak, there may not be a large wet spot giving you a clue to the area of the leak. Your only clue may be the strong odor left in your garage.
When looking for a fuel leak, follow your fuel lines starting at the fuel tank. Check every component that makes up your fuel system for leaks.
Detailed information can be found at:
This is Where Your Husqvarna is Leaking Gas
| Cause | Reason for Problem | Solution |
|---|---|---|
| Dirty of Failed Carburetor | The carburetor can collect a buildup of substances remaining from old gas that can cause blockages or parts failures. | Clean the carburetor and replace any damaged parts. |
| Old Fuel Filter | Filter can become weak and the plastic seams can fail over time. | Replace fuel filter. |
| Bad Fuel Pump | Pump can wear and deteriorate over time and may begin leaking at the seams. | Replace the fuel pump. |
| Bad Fuel Tank | A metal tank can develop a rust hole. A poly tank can leak at the seams of the tank. | Replace the fuel tank. Sometimes, a rust hole can be repaired if you can no longer find a replacement tank. |
| Bad Fuel Shut-Off Valve | Metal and plastic shut-off valves are prone to leaking. | Replace the shut-off valve. |
| Cracked Fuel Lines | Rubber fuel lines become dry and cracked causing gas to leak. | Replace the fuel lines. |
| Cracked Primer Bulb | The rubber of the primer bulb can begin leaking when it cracks or isn’t attached well to the fuel hose. | Replace the primer bulb. |
| Bad Seal in the Gas Cap | The gas cap seal can fail and no longer seal allowing gas to splash out of the fuel tank around the gas cap. | Replace the gas cap. |
