john deere 2940 problems

John Deere 345 Problems: Common Issues & Fixes

The John Deere 345 is a popular mower with a reliable reputation. However, like any other mower, it can experience some common problems. According to user reviews, the most common issues with the John Deere 345 include coil failure, throttle problems, engine problems, and starting problems. Fortunately, there are practical solutions to these problems, which we will discuss in detail.

Coil Failure: Causes and Solutions

Coil failure is a common problem that John Deere 345 owners may encounter. It can be frustrating when your mower fails to start or experiences intermittent engine issues. Understanding the causes of coil failure and knowing how to address them is essential for maintaining the performance of your mower.

Common Causes of Coil Failure

There are several components that can contribute to coil failure in the John Deere 345. These include:

  • Ignition Coil: The ignition coil is responsible for generating the electrical spark needed to ignite the fuel in the engine. If the ignition coil is faulty, it can result in intermittent or no spark, leading to coil failure.
  • Pulser Coil: The pulser coil works in conjunction with the ignition coil to ensure accurate timing of the spark. A malfunctioning pulser coil can disrupt the ignition process and contribute to coil failure.
  • Igniter: The igniter is responsible for controlling the timing and duration of the spark. If the igniter becomes faulty, it can cause issues with the ignition system and ultimately lead to coil failure.
  • High-Tension Wiring: The high-tension wiring connects the ignition components and delivers high voltage to the spark plug. Damaged or worn-out wiring can impede the flow of electrical current and affect the performance of the coil.

Diagnosing and Solving Coil Failure

When facing coil failure in your John Deere 345, it is crucial to accurately diagnose the issue before implementing a solution. Here are steps you can take to identify and resolve coil failure:

  1. Spark Tester: Use a spark tester to check for spark. This tool helps determine if the ignition coil is functioning correctly. If no spark is present, it may indicate a faulty ignition coil that needs to be replaced.
  2. Adjustment and Alignment: Proper spacing between the ignition armature and the flywheel is crucial for the ignition system to function optimally. If replacing the ignition coil, ensure precise adjustment and alignment, securing the replacement coil with mounting screws and aligning the magnets on the flywheel.

By addressing the underlying causes of coil failure and taking the necessary steps to diagnose and resolve the issue, you can restore the performance of your John Deere 345 mower.

Faulty Ignition CoilIntermittent or no spark, engine misfireReplace the ignition coil
Malfunctioning Pulser CoilInaccurate timing of the spark, engine performance issuesReplace the pulser coil
Faulty IgniterTiming and duration issues with the spark, engine stallingReplace the igniter
Damage in High-Tension WiringWeak or no spark, engine misfireRepair or replace the high-tension wiring

Throttle Problems: Causes and Fixes

Throttle issues are a common problem that John Deere 345 owners may encounter. These problems can manifest as difficulty starting the tractor when cold, slow RPMs, and rough running. If you’re experiencing these symptoms, it’s crucial to identify and resolve the underlying throttle problems to ensure optimal performance.

One potential source of throttle problems is the throttle handle itself. Over time, the handle may become worn or damaged, leading to improper operation. It’s recommended to check the throttle handle for any signs of wear or damage. If necessary, replace the handle with a new one to restore proper functionality.

Another component that can contribute to throttle issues is the carburetor. A dirty or malfunctioning carburetor can disrupt the fuel-air mixture, affecting engine performance. To address this, it’s important to inspect and clean the carburetor regularly. If cleaning doesn’t resolve the issue, consider replacing the carburetor with a new one.

Additionally, the air filter plays a crucial role in maintaining proper throttle function. A clogged or dirty air filter can restrict airflow, leading to decreased engine performance. Inspect the air filter and clean or replace it as needed to ensure optimal throttle operation.

The clearance between the control choke arm and control lever is another aspect that can impact throttle performance. If the clearance is incorrect, it can affect the opening and closing of the throttle. Adjust the clearance according to the manufacturer’s guidelines to ensure smooth throttle operation.

One more potential culprit behind throttle problems is the throttle wire. If the throttle wire becomes loose or disconnected, it can interfere with proper throttle control. Regularly inspect the throttle wire and tighten any loose connections to maintain optimal throttle performance.

If all else fails, it may be necessary to clean or replace the carburetor. In some cases, a carburetor adjustment may also be required to restore proper throttle functioning. Consider consulting a professional or referring to the manufacturer’s guidelines for detailed instructions on carburetor maintenance and adjustment.

Throttle Problems: Troubleshooting Tips

If you’re experiencing throttle issues with your John Deere 345, consider these troubleshooting steps:

  1. Check the throttle handle for wear or damage.
  2. Inspect and clean the carburetor.
  3. Ensure the air filter is clean and free from obstructions.
  4. Adjust the clearance between the control choke arm and control lever.
  5. Inspect and tighten any loose throttle wire connections.
  6. If necessary, consider cleaning or replacing the carburetor.

By following these steps and addressing any identified throttle problems, you can restore optimal performance to your John Deere 345 and ensure smooth operation while mowing.

john deere 345 throttle problems

Engine Problems: Causes and Solutions

Engine problems can arise with the John Deere 345 due to various factors. These include aged or contaminated fuel, engine overheating, and loss of power. It is crucial to address these issues promptly to maintain the optimal performance of your mower.

One of the primary causes of engine problems is the use of aged or contaminated fuel. Over time, fuel can degrade and develop impurities that can clog the fuel system and affect engine performance. To prevent this, always use fresh, high-quality fuel and avoid storing fuel for extended periods.

Contaminated fuel can also be a culprit behind engine issues. Impurities such as dirt, water, or debris can enter the fuel tank, causing blockages in the fuel lines or injectors. Regularly inspect and clean the fuel tank to ensure it is free from any contamination that could compromise engine performance.

Engine Temperature Matters

“Maintaining proper engine temperature is crucial for the longevity and performance of your John Deere 345. Overheating can lead to severe engine damage and ultimately result in engine failure.”

Another factor that can contribute to engine problems is excessive engine temperature. Operating the mower in hot weather conditions or under heavy load for prolonged periods can cause the engine to overheat, putting stress on various components. It is essential to monitor the engine temperature and allow it to cool down if it exceeds recommended levels.

Additionally, regular maintenance of the engine oil is vital to prevent engine problems. Insufficient or dirty engine oil can lead to increased friction and wear, affecting the overall performance and longevity of the engine. Follow the manufacturer’s guidelines for oil change intervals and ensure you use the recommended engine oil for optimal results.

By addressing fuel-related issues, monitoring engine temperature, and maintaining proper engine oil levels, you can mitigate engine problems and keep your John Deere 345 performing at its best.

john deere 345 engine problems

Summary Table: Common Engine Problems and Solutions

Engine ProblemCauseSolution
Aged or Contaminated FuelFuel degradation or impuritiesUse fresh, high-quality fuel
Clean fuel tank regularly
Engine OverheatingOperating in hot weather or under heavy loadMonitor engine temperature
Allow engine to cool down
Loss of PowerInsufficient or dirty engine oilFollow oil change intervals
Use recommended engine oil

Starting Problems: Troubleshooting and Fixes

Starting problems can be a frustrating issue when it comes to using the John Deere 345 mower. If you’re experiencing difficulties getting your mower to start, there are a few common culprits to consider: the solenoid, fuel line, and fuel pump.

To begin troubleshooting, it’s important to test the solenoid using a voltmeter. This will help determine if the solenoid is functioning properly or if it needs to be replaced. A solenoid that is not working correctly can prevent the mower from starting.

Expert Tip: Use a voltmeter to test the solenoid. If the voltmeter reading is below the manufacturer’s specifications, it’s a clear indication that the solenoid needs to be replaced.

Additionally, it’s crucial to inspect the fuel line for any restrictions or damage. A clogged or damaged fuel line can prevent fuel from reaching the engine, resulting in starting problems. If any issues are identified, the fuel line should be repaired or replaced as necessary.

Expert Tip: A simple way to check the fuel line is to detach it from the fuel pump and blow air through it. If there is resistance or no airflow, the fuel line may be clogged and require cleaning or replacement.

The fuel pump, responsible for delivering fuel to the engine, should also be inspected. Ensure that the fuel pump is functioning correctly and providing the necessary fuel flow to start the mower. If any malfunction is detected, the fuel pump should be repaired or replaced as needed.

By addressing issues with the solenoid, fuel line, and fuel pump, you can troubleshoot and fix starting problems with your John Deere 345 mower, ensuring smoother and more reliable performance.

john deere 345 starting problems
Starting ProblemsTroubleshooting Steps
SolenoidTest with a voltmeter
Replace if necessary
Fuel LineInspect for restrictions or damage
Repair or replace as needed
Fuel PumpEnsure proper functioning
Repair or replace if malfunctioning

Electrical Problems: Diagnosing and Resolving

Even the reliable John Deere 345 can develop electrical problems, which can lead to difficulties with starting the mower. These issues can be attributed to several factors, such as a low charge in the battery, dirty connections, or faulty components like the starter and circuit board. It is crucial to diagnose and resolve these electrical problems to ensure the smooth operation of your John Deere 345.

To begin troubleshooting, start by checking the battery. A low charge can impede the mower’s starting capabilities. Test the battery with a voltmeter to ensure it is providing sufficient power. If the battery is below the recommended level, it may need to be recharged or replaced to address the electrical problems.

Dirty connections can also disrupt the flow of electricity in the mower. Inspect the battery terminals and connectors for any corrosion or build-up. Clean the connections thoroughly using a wire brush or an appropriate battery terminal cleaner. This simple maintenance step can significantly improve the electrical performance of your John Deere 345.

In addition to the battery, the starter and circuit board should be inspected for any faults. A faulty starter can prevent the mower from starting altogether. If you suspect a faulty starter, it may need to be replaced. Similarly, the circuit board, which controls various electrical functions of the mower, should be examined for any signs of damage or malfunction. In case of a faulty circuit board, professional assistance may be required to replace or repair it.

Electrical Problems: Troubleshooting Checklist

  • Check the battery’s charge level using a voltmeter.
  • Clean the battery terminals and connectors to ensure proper electrical contact.
  • Inspect the starter for any faults or signs of wear and consider replacing if necessary.
  • Examine the circuit board for any damage or malfunction and seek professional help if needed.

By addressing electrical problems promptly and resolving any issues with the battery, connections, starter, or circuit board, you can ensure that your John Deere 345 is ready to tackle any mowing task.

Common Electrical ProblemsPossible CausesSolutions
Starting difficultiesLow charge in the batteryRecharge or replace the battery
Intermittent power lossDirty connectionsClean battery terminals and connectors
Mower not startingFaulty starterReplace the starter
Electrical malfunctionsFaulty circuit boardSeek professional assistance for replacement or repair


In conclusion, if you own a John Deere 345, it’s important to be aware of some common problems that may arise. From issues like coil failure and throttle problems to engine malfunctions and starting difficulties, these challenges can be frustrating. However, the good news is that with proper maintenance and troubleshooting, these problems can be resolved.

To keep your John Deere 345 running smoothly and efficiently, it is recommended to regularly inspect and service the mower. This includes checking and replacing any faulty components, such as the ignition coil, throttle handle, or fuel pump. Additionally, it’s important to consult with a professional mechanic if the problems persist or if you need expert guidance.

By investing in the maintenance of your John Deere 345 and addressing any issues promptly, you can ensure its longevity and optimal performance. Taking the time to address these problems and work with trusted mechanics will give you peace of mind and allow you to continue enjoying the reliable reputation that John Deere mowers are known for.


What are some common issues with the John Deere 345?

Common issues with the John Deere 345 include coil failure, throttle problems, engine problems and starting problems.

What can cause coil failure in the John Deere 345?

Coil failure in the John Deere 345 can be caused by issues with the ignition coil, pulser coil, igniter, or high-tension wiring.

How can coil failure be diagnosed and fixed?

Coil failure can be diagnosed using a spark tester. If the spark is not present, the ignition coil may need to be replaced. The replacement coil should be properly aligned and secured with mounting screws.

What are the causes of throttle problems in the John Deere 345?

Throttle problems in the John Deere 345 may be caused by issues with the throttle handle and carburetor.

How can throttle problems in the John Deere 345 be fixed?

To fix throttle problems, the throttle handle should be checked for proper operation, the air filter should be inspected and cleaned, and the clearance between the control choke arm and control lever should be adjusted. The throttle wire should also be tightened, and if necessary, the carburetor may need to be cleaned or replaced.

What are the common causes of engine problems in the John Deere 345?

Engine problems in the John Deere 345 can be caused by aged or contaminated fuel, engine overheating or loss of power.

How can engine problems in the John Deere 345 be resolved?

To address engine problems, it is important to ensure that fresh, high-quality fuel is used and that the fuel tank is free from contamination. Regular maintenance of the engine oil is also essential to prevent engine issues.

What are the possible causes of starting problems in the John Deere 345?

Starting problems in the John Deere 345 can be caused by issues with the solenoid, fuel line, or fuel pump.

How can starting problems in the John Deere 345 be troubleshooted and fixed?

To troubleshoot starting problems, the solenoid should be tested using a voltmeter, and the fuel line should be checked for any restrictions or damage. The fuel pump should also be inspected to ensure proper functioning.

What are the common electrical problems in the John Deere 345?

Electrical problems in the John Deere 345 can lead to issues such as starting difficulties. These problems can be caused by a low charge or dirty connections in the battery, as well as faulty components like the starter and circuit board.

How can electrical problems in the John Deere 345 be diagnosed and resolved?

To resolve electrical problems, the battery should be checked for proper charge and clean connections, and any faulty components should be replaced.

What are the recommended maintenance steps for the John Deere 345?

Regular inspection and service of the mower, and consulting with a professional mechanic if necessary, are recommended to address and prevent common problems in the John Deere 345.


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