John Deere La120 Problems: Troubleshooting Tips and Solutions

Having trouble with your John Deere LA120? Common problems include engine issues, belt slipping, and cutting inefficiency.

Addressing these issues promptly can help restore your mower’s performance and efficiency. Regular maintenance and timely repairs are key to keeping your John Deere LA120 in optimal working condition. We will explore some of the most common problems that John Deere LA120 owners encounter and provide solutions to get your mower running smoothly again.

With the right knowledge and troubleshooting steps, you can get your John Deere LA120 back to its peak performance in no time.

John Deere La120 Problems: Troubleshooting Tips and Solutions


Common John Deere La120 Problems

Experiencing issues with your John Deere LA120? Let’s delve into the common problems you may encounter to help you understand and troubleshoot these issues effectively.

Engine Troubles

The John Deere LA120 may encounter engine issues like difficulty starting, stalling, or lack of power. These problems could stem from a clogged fuel filter, dirty air filter, or faulty spark plug.

  • Slow starting
  • Stalling
  • Lack of power

Electrical Issues

Electrical problems, such as malfunctioning lights, erratic gauges, or a dead battery, can arise. These issues might be caused by loose connections, a faulty battery, or a damaged wiring harness.

  • Misbehaving lights
  • Erratic gauges
  • Dead battery

Transmission Problems

The John Deere LA120 might develop transmission issues, indicated by difficulty shifting gears, noisy operation, or lack of drive power. These concerns could be attributed to low transmission fluid levels, worn-out gears, or a damaged drive belt.

  • Shifting difficulties
  • Noisy operation
  • Lack of drive power

Troubleshooting Tips

Troubleshooting Tips:

Checking The Fuel System

If your John Deere La120 is experiencing issues, start by checking the fuel system. Begin by inspecting the fuel tank for any visible damage or leaks.

Inspecting The Battery And Wiring

Next, inspect the battery and wiring components. Ensure that the battery terminals are clean and tightly connected. Check for any frayed wires or loose connections.

Examining The Transmission

Lastly, examine the transmission of your John Deere La120. Look for any signs of leaks or damaged belts. Ensure that the transmission fluid levels are adequate.

Solutions To La120 Problems

Cleaning Or Replacing The Carburetor

Clean or replace carb if engine stalls or runs unevenly.

Repairing Or Replacing Electrical Components

Check & fix any faulty electrical parts like spark plugs or wiring.

Fixing Or Replacing The Transmission

Repair or change tranmission to address gear shifting issues.

John Deere La120 Problems: Troubleshooting Tips and Solutions


Maintenance Tips To Prevent La120 Problems

As a John Deere LA120 owner, it’s essential to be aware of common problems that may arise with this lawn tractor. However, with the right maintenance tips, you can prevent these issues and ensure smooth operation of your LA120 for years to come. Let’s explore some essential maintenance tips to prevent LA120 problems:

Regular Cleaning And Inspection

Proper and regular cleaning of your John Deere LA120 is crucial to prevent build-up of debris and dirt, which can lead to clogging and mechanical issues. Schedule routine inspections to identify any signs of wear and tear, loose fasteners, or damaged components.

Proper Fuel Storage

Storing fuel properly is key to preventing potential problems with your LA120. Ensure that you use fresh, clean fuel and store it in a tightly sealed container away from direct sunlight or extreme temperatures. It’s also important to add a fuel stabilizer to prevent the fuel from deteriorating and causing engine issues.

Battery Maintenance

Regularly check the battery terminals for corrosion and ensure they are clean and free of any buildup. Additionally, keep the battery charged during the offseason to prevent it from losing power and potentially causing starting issues.

When To Seek Professional Help

While the John Deere LA120 lawn tractor is designed for durability and longevity, you may encounter certain problems that require professional assistance. This section will cover three main scenarios where seeking professional help is highly recommended. Whether it’s complex repairs, a lack of mechanical knowledge, or the need to understand your warranty coverage, understanding when to seek professional help can save you time, money, and frustration with your John Deere LA120.

Complex Repairs

If you’re facing complex repairs with your John Deere LA120, it’s best to consult a professional technician. While simple maintenance tasks like changing the oil or replacing the air filter can often be done by the owner, more advanced repairs require specialized knowledge and tools. Attempting to undertake these repairs on your own may lead to further damage or even void your warranty.

Lack Of Mechanical Knowledge

Not everyone possesses extensive mechanical knowledge, and that’s perfectly fine. If you find yourself unsure about troubleshooting or fixing problems with your John Deere LA120, seeking professional help is the right choice. Trained technicians have the experience and expertise to quickly diagnose and resolve issues, ensuring your tractor continues to perform at its best.

Warranty Coverage

Understanding your warranty coverage is crucial to maintaining your John Deere LA120. If you encounter any problems with your tractor while it’s still under warranty, it’s essential to consult a professional for repairs. Attempting to fix the issues on your own or taking it to an unauthorized repair shop may result in voiding your warranty. By seeking professional help, you can ensure that any necessary repairs are covered by the warranty, giving you peace of mind and saving you potentially costly expenses.

John Deere La120 Problems: Troubleshooting Tips and Solutions



The John Deere LA120 has some common problems that users may encounter. Knowing these issues and seeking professional help can ensure a smoother experience with this lawn tractor. Regular maintenance, careful operation, and prompt troubleshooting can mitigate many of these challenges.

Keep up with the care of your LA120 to enjoy a long and efficient use.

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