John Deere x320 Problems (Reasons + Solutions)

The John Deere X320 is one of the best lawnmowers on the market. Also, it is very popular worldwide because of its amazing features. However, like any other machine, your John Deere x320  also has some shortcomings. 

So, what are John Deere x320 Problems?

The users of the John Deere x320 often face:

  • Engine overheating
  • Transmission issues
  • Fuel issues
  • Carburetor problems
  • Low RPM
  • PTO clutch not engaging
  • Steering can’t move and loses calibration.

Only knowing the problems is not worth enough. You must know the solution to them. So, continue reading as the article covers simple solutions for all issues. 

John Deere X320 Engine Problems

Engine problems refer to any issues that affect the way an engine functions. These issues can range from minor to major problems. Here are some of the most discussed engine issues listed:

Problem Reason Solution 
Engine overheats Air intake screen blocked Clean air intake screen. 
Improper engine oil viscosity Replace the oil. 
Low engine oil Add enough oil. 
Too fast idle Adjust carburetor to lower speed.
Engine won’t start Improper fuel grade Replace with correct fuel. 
Fuel system blocked Clean the fuel system. 
Faulty spark plug Replace the spark plug. 
Engine runs inconsistently Clogged cooling fins Clean the fins. 
Loosen electrical connections Tight the connection. 
Incorrect ignition setting Make ignition setting correctly. 
Clogged air filter Clean air filter. 

Problem 1: Engine Overheats

Engine overheating is one of the most common issues the users of the x320 face. Engine overheating is a big problem because it can induce some other issues. 

If the vehicle is loaded highly, overheating happens quite often. In order to reduce engine strain, you may need to lighten the load and slow down the mowing speed. 

Apart from that, there are multiple potential reasons for this issue. Let’s focus on them one by one. 

Reason 1: Air Inlet Screen Blocked

The blocked air intake screen is one of the primary causes of engine overheating. In this way, new air cannot enter the engine, preventing the outflow of the hot, old atmosphere.

Solution: To get rid of this situation, you need to clean the Air Inlet. To clean an air inlet screen, you’ll need the following materials. 

Required Tools: A screwdriver, a brush, a cloth, and a cleaning solution.

  • Carefully remove the screen by taking off the clips from the screen with the screwdriver. 
  • Now, lightly scrub the screen to remove any dirt, dust, or debris. Then, wipe the screen down with a cloth after cleaning it with the solution.
  • Ensure that the screen has dried completely before reinstalling it.

One thing you need to consider is that the screens that are heavily clogged or damaged may need to be replaced.

Reason 2: Improper Engine Oil Viscosity

Another leading reason is improper engine oil viscosity. The viscosity of the oil is affected by cold weather and by age. When oil gets older and more degraded, it becomes harder to use.

Solution: You simply need to replace the old engine oil with new premium oil to get over this problem. 

Reason 3: Low Engine Oil

The low or high-level engine oil also leads the engine to get overheated. If the oil level is low, it produces more resistance. Consequently, the engine generates more heat.

Solution: Inspect the engine oil regularly and pour enough oil into the engine. 

Reason 4: Too Fast Idle

Idle speeds may be set too high, resulting in the engine working unnecessarily. Consequently, the engine is getting overheated. 

Solution: You need to adjust the carburetor to a slower speed. If you don’t know how to do that, check the video.

Problem 2: Engine Won’t Start

Engine won’t start is regarded as one of the main issues with engine problems. This problem can happen due to an incredibly wide range of factors. When this is the case, narrowing down the problem and fixing it can be challenging. 

That’s why we’ll go over all the main troubleshooting steps you should take if your engine won’t start.

Reason 1: Improper Fuel Grade

If you’re using low-grade fuel, it can potentially incorporate the issue of the engine not starting. A mower that has been stored for a while will also lose its fuel quality. 

Solution: Always make sure to use premium quality fuel. On the other hand, if the mower has sat for a while, the oil needs to be emptied and refilled.

Reason 2: Fuel System Blocked 

You should check the fuel system for blockage. If you find any blockage, it changes the fuel viscosity and degrades the fuel. Also, debris can build up over time and prevent fuel flow.

Solution: You need to clean the fuel system as soon as you find the blockages. Follow the procedures given below to unclog the fuel system. 

Required tool: A cleaning solution, a soft cloth, or a brush.

  • First, inspect the fuel filter for any debris or blockages. If the filter is dirty, clean it with a fuel filter cleaning solution. 
  • You will then need to locate and remove the fuel pump from the fuel tank. Make sure the pump is free of debris and blockages with the brush,
  • Afterward, locate and remove the fuel injectors. Check the injectors for clogs or debris. Clean the injectors by using a cloth. 

Reason 3: Faulty Spark Plug

Usually, spark plugs ignite atomized fuel from injection nozzles by creating a small spark.

Solution: These are cheap to replace. So, discard the faulty plug and replace the spark plug. You can follow this short tutorial for DIY at home.

Problem 3: Engine Runs Inconsistently

Sometimes, you may feel that your vehicle is not running as you expect. It’s running unevenly as if there is a problem. 

In order to ensure smooth operation, you should fix a few things that may contribute to your engine not running evenly.

Reason 1: Cooling Fins are Clogged

When cooling fins accumulate dirt over time, the engine cannot remove enough heat. Engine temperatures can fluctuate due to this uneven heat dissipation. 

In high temperatures, the efficiency of the engine can often suffer, making those clogged fins directly responsible for uneven engine performance.

Solution: The solution is in your hands. It is necessary to unblock the fins and clean them of all dirt buildup.

Reason 2: Loose Electrical Connections

If any of the electrical connections get loosened it leads to the inconsistent running of the vehicle. Also, damaged and corroded electrical components can cause this issue. 

Solution: First you need to check all the connections. If you find any loose connection, go for expert assistance. On the other hand, if you find any electrical component corroded or damaged, replace that.  

Reason 3:  Incorrect Ignition Setting 

Another leading reason is having an incorrect ignition setting. There are several components of the ignition system, such as the ignition switch, the spark plugs, the ignition module or ignition coil, and the distributor.     

Solution: You need to check the spark plug first. If you find it faulty, replace them. Then check the ignition switch, module, and distributor respectively. Then replace the faulty one. They are cheap components so you don’t have to worry. 

Reason 4: Clogged Air Filter 

If an air filter gets clogged, it restricts airflow to the engine which ultimately will affect its performance. 

john deere x320 clogged air filter

Solution: All you have to do is clean the blockage of the air filter. Replacing an old filter with a new one is a good idea.

John Deere X320 Transmission Problem

Transmission problems refer to issues with a vehicle’s transmission system, which is responsible for transmitting power from the engine to the drive wheels. It’s time to focus on excessively happened transmission issues: 

Problem Reason Solution 
Transmission loses power Worn out piston pump seals Replace the seals. 
Misplaced belt Adjust the belt. 
Stripped out drive pulley Change drive pulley. 
Transmission dies after 700-900 hours End of lifespan Rebuild. 
Improper oil Replace the oil. 

Problem 1: Transmission Loses Power

One of the biggest problems the users of JD x320 faces is transmission’s loss of power. There are a variety of reasons why this can happen.

Reason 1: Worn-out Piston Pump seals 

Long-term use may cause the seals in the transmission piston pump to wear out. This could lead the transmission to lose power frequently. 

Solution: The piston pump seals need to be replaced if they are worn out. Head out to your nearest technician for the replacement issue.

Reason 2: Misplaced Belt

Transmissions can lose power due to belt issues. At both medium range and higher speeds, this would result in power loss. Occasionally, the engine will not start due to misplaced belts.

Solution: The belt needs to be placed back along its length. Make sure you clean out any accumulated debris or dirt in the transmission tunnel while you are adjusting the belt.

Reason 3: Stripped out Drive Pulley

Over time the drive pulley gets stripped out. That stripped-out drive pulley can lead the transmission to lose power. 

Solution: Changing the drive pulley could solve the problem as it is quite soft and susceptible to damage.

Problem 2: Transmission Dies after 700-900 hours

Once you’ve mowed for 700 to 900 hours, you may find your transmission dead. This transmission problem affects almost every user at some point in time

Reason 1: End of lifespan

Usually, the JD x320 has a K58 transmission whose ultimate lifespan is 900 hours. So it can be the obvious reason for this issue.

Solution: You can rebuild the transmission by following this guideline.  

Reason 2: Improper oil

Sometimes improper oil can lead to this issue as well. So fix it without further ado. 

Solution: Change the oil with 5W50 synthetic motor oil (2 quarts). In case that does not work, sand away the scratches on the inside of the parts and see if that helps. 

John Deere X320 Fuel Problem

There are multiple fuel issues that can occur in the JD x320. Let’s take a look at the ones that have already occurred.    

Problem Reason Solution 
Carburetor issues Clogged carburetor Clean the carburetor. 
Fuel pump malfunctioning Cracks & damage on the Outer Metal SurfacesReplace damaged parts .

Problem 1: Carburetor Problem

Engine systems are incomplete without carburetors. Air and fuel are combusted inside it. Also, carburetors provide your vehicle with power.  

By controlling air and fuel flow, it performs these functions with the help of throttle control. The users complain that sometimes the carburetor couldn’t control the power

Reason: Clogged Carburetor

One of the most common reasons for initiating carburetor problems is a clogged carburetor. Over time, the gasoline and air mixture can become gummed up due to this clogging. 

john deere x320 clogged carburetor

Solution: You have to clean the carburetor to fix this issue. To perform this job you need the tools given below. 

Required tools: A small brush and a cleaning spray.

  • First, take out all the metal parts of the carburetor. Then, use a small brush to take apart everything you can.  
  • Once this is done, you need to put all the parts aside. Now, spray carburetor cleaning fluid over the parts and let it sit for a while. 

Problem 2: Fuel Pump Malfunctioning  

Fuel pump on the JD x320 might be mounted by the carburetor. This problem is a usual scenario for users.  

Reason: Cracks & damage on the Outer Metal Surfaces  

Fuel pump outer metal surfaces may suffer from hairline cracks and damage. And this is the most potential cause which leads to the malfunctioning fuel pump.

Solution: To fix this issue, follow the procedure given below:

  • Shut off the fuel valve first. Then disconnect the fuel hoses and remove all mounting screws. 
  • Now inspect carefully. If you find any broken or damaged parts, you will need to replace them with similar parts.

John Deere x320 Steering Problems

Steering allows you to control your movements precisely. However, it is common for problems to occur due to overuse or due to difficult conditions or environments: 

Problem Reason Solution 
Steering Won’t respond Drive belt worn-out Replace drive belt. 
Drive belt slipping Tighten the belt. 
Steering loses calibration Hitting a brick or rock Tightening nut holding. 
Low RPM Wrong fuel Replace with right fuel. 
Clogged fuel filter Clean fuel filter.

Problem 1: Steering Won’t Response

The users of John x320 sometimes face that the steering isn’t responding. Also, you may find the acceleration is uneven. 

Reason 1: Drive Belt Worn-out 

Transmission pulleys allow the wheel to turn with the help of the drive belt. If the drive belt is worn out, your steering won’t respond to you too much. 

Solution: First, check the drive belt if any wear occurs on the edges or appears cracked. If you find any sign of wear, replace it without wasting time. 

Reason 2: Drive Belt Slipping

On the other hand, the belt is not worn out, but it is too loose. Consequently, slipping on the crankshaft happens which creates driving problems. 

Solution: In this situation, you can easily restore the working order. All you need to do is tighten the belt.  

Apart from these, the issue may arise due to dirt in the pulley shaves. Clean them if you find them dirty.  

Problem 2: Steering Lose Calibration  

Another common problem that users of JD x320 encounter is that the steering loses its calibration. 

Reason: Hitting a Brick or Rock 

The most probable reason is you could put pressure on the steering system if you hit a brick or rock. Also, this problem may occur due to excessive use.

Solution: Remove all the gears and turn them off to fix the steering. Readjust the steering wheel so it is aligned with the mower wheels. Then, tighten the nut holding the ball joint in place after loosening it.

Problem 3: Low RPM

The John Deere X320 often suffers from low RPMs which occur at wide open throttle (WOT). Not as you’d expect, the engine revs up. The motor seems to be weaker than it should be if the RPM is low. 

Reason 1: Wrong Fuel

The most common reason behind low RPM is using the wrong fuel. If the fuel is not right, it leads to low RPMs.

Solution: Replace the correct grade of fuel to get over this situation. 

Reason 2: Clogged Fuel Filter

Clogged fuel filter is another important cause that can result in low RPM. You can easily fix this.

Required tool: Solvent cleaner.

Solution: Clean the fuel filter to get rid of the clog. Follow the steps below to do the job: 

  • Before cleaning the fuel filter, unplug the battery to avoid any potential risks.
  •  Remove the fuel filter from the fuel line next. In order to clean the dirty filter, you need to spray it with a solvent cleaner. Wait around an hour for it to dry after that.
  • Reattach the fuel filter.

John Deere X320 Mower Deck Problems

The mower deck refers to the underside of a mower that cuts grass. The deck itself can be damaged or bent due to rust, wear and tear, or sustain damage to the blades.

Problem Reason  Solution 
Discharged chute clogged Driving too fast Drive in lower speed. 
Belt fitted improperly Fit the belt correctly. 
Imbalance and poor cutting result Deck level is low Lift the deck. 
Dull blades Sharpen the blades or replace. 
Operating at a great ground speed Slow down the speed.
Mower vibrating excessively Dirt in deck or sheaves Clean the dirt. 
Unaligned belt or pulleys Align the belt. 
Improper blade balancing Balance the blades properly. 

Problem 1: Discharged Chute Clogged 

Blocked or obstructed chutes prevent material from flowing through them. When debris accumulates in the chute or something gets stuck in the chute, it causes a blockage.

Reason 1: Lawn Mower Is Driving too Fast

If you drive your mower too fast it causes a clogged discharge chute. The solution is simple.

Solution: Always make sure to drive your JD x320 with appropriate speed. Never ever use high speed while mowing. 

Reason 2: Belt Fitted Improperly

If the belt is fitted improperly or the belt is loose, it can initiate discharge chute clogged. Also, the improper belt alignment on the pulleys can lead to this issue. 

Solution: You need to fit the belt correctly. Follow the given instructions below:

  • Adjust the belt tension by locating the belt tensioner. To tighten a loose belt, use a belt tensioner. Use the belt tensioner to loosen a tight belt.
  • Ensure the belt is aligned correctly on the pulleys. All parts and components should be free of rubbing against each other.
  • Ensure the belt is free from cracks and fraying edges. Belts need to be replaced if they are damaged. Once the belt has been properly tensioned and aligned, start the system and check for any problems.

Problem 2: Imbalanced And Poor Cutting Result 

Regardless of the mower model you use, any user will face the degrading cut quality of their mower over time. This is a normal issue. You can easily fix this.

Reason 1: Deck Level Is too Low

The leading reason is having too low a deck level. In this case, the mower blades may bend the grass rather than cut it through.

Solution: To get out of this situation, it is necessary to lift the mower deck to a higher position slightly. It can improve the cutting quality.

Reason 2: Dull Blades

The blades becoming dull over time is another contributing factor to poor cutting quality. The situation is easy to handle.

Solution: You should resharpen the blades quite often. It is suggested to sharpen the blades twice a month. According to the manufacturers, it is recommended to sharpen blades after 25-30 hours of continuous use.

On the other hand, if the blades are still not functioning even after resharpening, check for damage caused by rocks, such as large gouges. If they are worn out, it’s high time to replace them.  

Reason 3: Operating at a Greater Ground Speed

You may simply operate your vehicle at a greater speed. If you do so, the cutting quality won’t come as you desire.

Solution: So, Slow down the speed while mowing. Also, don’t forget to give the blades a little extra time to cut. The cutting result will be astonishing. 

Problem 3: Mower Vibrating Excessively

John Deere x320’s mower is designed to handle a certain level of vibration. However, if the vibration is too much to feel comfortable, you should fix it immediately.

Reason 1: Dirt on Mower Deck or in Sheaves

It is possible that debris has made its way into the sheaves and prevented them from moving smoothly. Also, the dirt can be stored on the mower deck. 

Solution: You need to clean all the debris from the mower deck. Again, it is important to clean the pulleys to make sure they are not clogged. 

Reason 2: Unaligned Belt or Pulleys

The unaligned belt or pulleys can lead to vibrating the mower excessively. There is quite a bit of repetition of the situation.

Solution: You need to align the belt and pulleys correctly. It prevents the mower from making unnecessary vibrations.

Reason 3: Improper Blade Balancing 

The blades rotate fast if they are uneven and unbalanced. As a result, the mower vibrates heavily due to heavy accessible forces. 

Solution: Therefore, the blades should be properly minted onto the bearings. And ensure that the blades are properly balanced.  

John Deere X320 PTO Problems

PTO issues are also common in John Deere x320. Let’s have a look at them:  

Problem Reason Solution 
PTO clutch won’t engage Faulty wire connection Reattach the wiring. 

Problem 1: PTO Clutch Won’t Engage

PTO stands for Power Take-Off switch or lever. PTO clutches or switches sometimes fail to engage, which results in the blades of the mower not spinning. And this is a common scenario for the users of the x320.

Reason: Faulty Wire Connection 

If the wire connection is not perfect, it can cause PTO to fail. So, if PTO won’t engage or remain too slow, you should check the connection. 

Solution: You need to reattach the wiring. If you find it is still not working, you should change the wires.  Unless there are obvious cuts, you might have to change the clutch. 


How many horsepower is a John Deere X320?

The John Deere X320 has a 22-horsepower (16.4-kW) V-twin engine. The engine is powered by the John Deere iTorque™ system, which is designed for durability, even cooling, and lugging.

Does a John Deere X320 have an alternator?

Yes, the John Deere X320 has a flywheel alternator with a 15-amp capacity. The alternator is regulated to prevent the battery from overcharging.


Hopefully, you got cleared regarding John Deere x320 problems. Despite all the problems described above, this particular model comes with a great powertrain. Stay alert of these issues while using. 

Hence, some issues can be fixed by yourself. For others, you may need to visit an expert. 

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