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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.

Common Husqvarna Lawn Mower Problems & Solutions

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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

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!

CauseReason for ProblemSolution
No gas in the fuel tankFuel tank is emptyFill with fresh fuel
Bad or old fuelFuel 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 capThe 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 plugExcessively 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 filterDirt 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 filterA dirty fuel filter will restrict fuel flow.Replace the fuel filter.
Bad fuel pumpA failed or leaking fuel pump will no longer create the pressure needed to pump fuel.Replace the fuel pump
Blocked fuel linesBad 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 carburetorThe 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 terminalsA 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 switchSafety 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 coilYour mower will not start when either the ignition switch or coil is bad.Test and replace a bad switch.
Broken recoilA 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.
Reasons Your Husqvarna Mower Won’t Start

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

CauseReason for ProblemSolution
Bad fuelFuel 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 filterDirt 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 finsCooling 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 linesBad 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 carburetorThe 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.
Reasons Why Your Husqvarna Mower Dies While Mowing

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

CauseReason for ProblemSolution
Plugged air filterDirt and grass can plug the .air filter preventing airflowRemove the filter and clean it. Replace the filter if it is in bad condition.
Too much oil in the crankcaseExcessive 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 lowLack 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 gasketInternal 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.
Reasons Why Your Husqvarna Mower is Smoking

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.

CauseReason for ProblemSolution
Bad drive beltA bad drive belt can cause your pump not to work efficiently.Replace a frayed, cracked, or worn belt.
Bad tensioner pulleyWhen 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 oilLow 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.
Reasons Why Your Husqvarna Mower’s Hydrostatic Transmission Seems Weak

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.

CauseReason for ProblemSolution
Incorrect tire pressureUnequal 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 turnBad dampers will cause your mower to jerk to one side when moving forward.Replace with a new damper.
Tracking adjustment needed on zero turnWhen 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 mowerWorn 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.
Reasons Why Your Mower Won’t Drive Straight or Steer Correctly

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

CauseReason for ProblemSolution
Drive release lever in the wrong positionThe drive release lever allows hydrostatic mowers to roll freely.The drive release lever must be in the operating position.
Missing key in the axleYour 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 wornThe 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 pulleyThe bearing in the tensioner pulley can fail.Replace the tensioner pulley.
Missing idler arm springIf 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 oilLow 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 fluidHot 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 systemAir 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.
Reasons Why Your Husqvarna Will Not Move or Go Forward

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

CauseReason for ProblemSolution
Loose or missing engine mounting boltsEngine 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 badWhen 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 bladesDamaged 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 spindleForeign 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 bearingsVibration 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 beltCheck deck belt and pulleys for wearing of the belt and bearing failure in the pulleysReplace any damaged or worn belts and pulleys.
Debris lodged in mowerThe 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.
Reasons Your Husqvarna Mower is Vibrating

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 bladeUneven tire pressuresEngine speed is too low
Bent mower bladeUnleveled mower deckGround speed is too fast
Blade installed wrongBent blade spindle or spindle bearingDamaged deck shell
Clogged Mower DeckWorn deck pulleys or beltOperator error
Reasons Your Husqvarna Mower is Cutting Uneven

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

CauseReason for ProblemSolution
Dirty of Failed CarburetorThe 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 FilterFilter can become weak and the plastic seams can fail over time.Replace fuel filter.
Bad Fuel PumpPump can wear and deteriorate over time and may begin leaking at the seams.Replace the fuel pump.
Bad Fuel TankA 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 ValveMetal and plastic shut-off valves are prone to leaking.Replace the shut-off valve.
Cracked Fuel LinesRubber fuel lines become dry and cracked causing gas to leak.Replace the fuel lines.
Cracked Primer BulbThe 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 CapThe 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.
Places Your Husqvarna Mower May Be Leaking Gas