Husqvarna MZ54 Problems : 6 Common Issues (Explained)

Offerings such as the Husqvarna MZ54 make Husqvarna the go to brand whenever one is looking for convenience and ease of use in a zero-turn mower. The zero-turn lawn mower is very compact, robust and versatile, allowing the user to attach several accessories such as a sweeper, a mulch kit and a triple grass collector. It is also designed with top-of-the-line blades and a superior clear cut fabricated deck for exceptional cutting performance.

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What Is The Husqvarna MZ54?

The Husqvarna MZ54 is a zero-turn mower, from the manufacturer Husqvarna. The mower uses a 24HP, 4-stroke, air cooled, Kawasaki FR730V engine and is equipped with a 54-inch fabricated cutting deck and ROPS (Roll Over Protection) system. A commercial Hydro-Gear (hydro-Gear ZT-3100) transmission is used in the Husqvarna MZ4 for greater power delivery to the wheels. The mower is however not full proof and problems can develop, these will be discussed down below.

Husqvarna MZ54 Problems

NB: The Husqvarna MZ54 zero turn is usually sold without any defects and any problems that may develop on the zero-turn mower, including those highlighted down below are usually caused by wear and tear arising on the mower while it is in operation.

1. Engine Failure To Start

The engine is a crucial component of the Husqvarna MZ54 zero turn mower since it powers all the essential functions of the zero-turn mower. Failure of the engine to start is therefore a big problem, since one can’t therefore mow the lawn. Reasons for the engine failing to start include;

  • Steering controls not being locked in the neutral position.
  • Contamination in the carburetor and fuel line hence fuel can’t reach the combustion chamber.
  • The Husqvarna MZ54 fuel supply shutoff valve being closed or being positioned in the wrong position.

Troubleshooting Engine Failure To Start

When the engine fails to start, one should do the following;

  • Checking and ensuring that the steering controls are locked in the neutral and outer position.
  • Regularly checking and cleaning the carburetor and fuel line to ensure there is no dirt or contamination inside.
  • Checking that the fuel shutoff valve is not closed and is in the correct position before starting the mower engine.

2. Starter Not Turning Engine Over

The engine is not self-starting and hence the need for the starter to start the engine. If the starter therefore stops operating the engine will not start. Reasons for the starter not turning the engine over could include;

  • Dead or defective battery
  • Defective battery terminal cable contacts or blown fuses hence current can’t flow.
  • Faults developing in the starter safety circuit.

Troubleshooting Starter Problems

In order to address problems with the starter one can;

  • Replace the Husqvarna MZ54 defective battery with a newer one.
  • Regularly check the battery terminal cable contacts and all the other essential wiring for faults and wiring that needs replacing. Also check to ensure all blown fuses are replaced.
  • Check the starter safety circuit for faults such as short circuits, open circuits and damaged wiring and hence replace these.

3. Uneven Or Slow Mower Movement

Whenever the Husqvarna MZ54 mower stops operating normally and starts exhibiting odd behavior such as being sluggish or being uneven, the problem could be caused by;

  • Parking brake being engaged while the mower is moving.
  • Bypass linkage being engaged when in motion.
  • Slack in the transmission drive belt or air being trapped in the hydraulic system.

Troubleshooting Slow Mower Movement

When the Husqvarna MZ54 mower starts moving slowly or is exhibiting odd behavior, the following can be done;

  • Releasing the parking brake before allowing the mower to move.
  • Checking to ensure that the bypass linkage is not engaged when the mower is in motion.
  • Regularly tightening the slack in the transmission drive belt and bleeding any trapped air in the hydraulic system.

4. Mower Deck Failing To Engage

The Husqvarna MZ54 mower deck being in the correct position is essential to getting even grass cuts hence when one notices that the mower deck is not engaging the problem could be caused by;

  • Loose drive belt for the Husqvarna MZ54
  • Loose electromagnetic coupling contacts or blown fuses.
  • Blade switch being faulty or loose from the cable contact.

Troubleshooting Mower Deck Failure To Engage

In order to solve problems with the Husqvarna MZ54 mower deck failing to engage one can try;

  • Tightening the tension on the drive belt when loose or replacing it when totally defective.
  • Checking and re-tightening the electromagnetic coupling contact when it becomes loose and also replacing any blown fuses to guarantee current is flowing.
  • Replacing the faulty blade switch or re-fixing it to ensure it is tight from the cable contact.

5. Trans Axle Leaking Oil

Overtime the Husqvarna MZ54 mower trans-axle may stop operating as intended and start leaking oil. When this problem starts occurring, it may be caused by;

  • Danged seals.
  • Damaged gaskets or entire housing.
  • Air being trapped in the Husqvarna MZ54 mower hydraulic system.

Troubleshooting Leaks In The Trans-Axle

Whenever the trans axle starts developing leaks and allows oil to flow out, the problem can be solved by;

  • Replacing the damaged seals.
  • Checking and ensuring that the gaskets are replaced. Also ensure the entire housing is airtight sealed and contains no leaks. If any leaks are found, it may need to be repaired or replaced.
  • Bleeding any air that is trapped in the hydraulic system.

6. Uneven Mower Cuts

The Husqvarna MZ54 is very good at cutting even grass cuts hence when the mower starts producing uneven cuts the problem can be caused by

  • Unequal air pressure in the Husqvarna MZ54 mower tires.
  • Blades being dull or bent.
  • Driving speed being too high or the grass being too long.

Troubleshooting Uneven Grass Cuts

When the Husqvarna MZ54 mower start producing uneven grass cuts, the problem can be addressed by;

  • Inflating all the tires to the same tire pressure to maintain stability.
  • Resharpening and reshaping the blades to ensure they are sharp and straight.
  • Reducing the driving speed and ensuring the Husqvarna MZ54 mower is not used to cut excessively long grass.

How To Avoid Husqvarna MZ54 Problems?

The best way to avoid any problems developing with the Husqvarna MZ54 is to regularize with the mower’s operator manual and only using the zero-turn mower as stated in the manual. Also avoid using the zero-turn mower in an environment where it might be damaged such cutting thick twigs.

How Many Hours Will a Husqvarna Zero-Turn Mower Last?

If properly taken care of the mower can last 600 to 800 hours or even more. 1,500 hours is also possible with occasional use.

What Is The Top Speed Of The MZ54?

The top speed of the Husqvarna MZ54 is 8.5mph in the forward direction and 5 mph in the reverse direction.


In conclusion the Husqvarna MZ54 is a robust and user friendly zero turn mower that is very effective when cutting the grass. It is however not perfect and can develop problems hence regular maintenance is necessary in order to ensure it functions as intended.