5 Major Cub Cadet RZT 42 Problems and Solutions

The most common Cub Cadet RZT 42 problems are PTO problems, transmission issues, clutch problems, engine problems and uneven cutting issues.

Here we discuss these issues in detail and provide the solutions in a way that a non-technical person also understands.

Cub Cadet RZT 42 Problems and Solutions

Now we are going to explore the issues of your cub cadet UTV  in detail with their easy solutions. Also explore the problems of Cub Cadet RZT L 54.

1. PTO Problems

PTO Problems in Cub Cadet RZT 42

The Cub Cadet RZT 42 is a reliable machine, but like any equipment, it can experience issues, particularly with its Power Take-Off (PTO) system. The PTO is essential for engaging the mower deck, making understanding and addressing any PTO problems crucial for maintaining optimal performance. 

Users often report several common PTO issues, including the PTO not engaging, intermittent engagement, and the PTO shutting off unexpectedly.

One prevalent problem is the PTO not engaging at all. This issue can often be traced back to electrical malfunctions such as a faulty PTO switch. The switch is responsible for sending the electrical signal needed to engage the PTO clutch. 

If the switch is defective or the wiring is compromised, the signal may not reach the clutch, preventing it from engaging. Additionally, a blown fuse can interrupt the electrical flow, leading to a similar outcome.

Intermittent engagement is another frequent complaint among Cub Cadet RZT 42 users. This problem can be more challenging to diagnose as it may involve both electrical and mechanical components. 

Loose or corroded wiring connections can cause sporadic power delivery to the PTO clutch, resulting in inconsistent engagement. 

Mechanical wear and tear, such as a worn-out PTO clutch, can also contribute to this issue. As the clutch deteriorates, its ability to maintain a strong connection diminishes, leading to intermittent performance.

Lastly, the PTO shutting off unexpectedly is an issue that can disrupt your mowing tasks. This problem often arises when the PTO clutch overheats. 

Overheating can occur due to prolonged usage or insufficient cooling. Additionally, belt problems, such as misalignment or excessive wear, can cause the PTO to disengage abruptly. Ensuring that the belt is correctly aligned and in good condition can help mitigate this issue.

Understanding these common PTO problems and their causes is vital for troubleshooting and maintaining the Cub Cadet RZT 42.

By being aware of the symptoms and potential sources of these issues, users can take proactive measures to ensure their mower operates smoothly and efficiently. Also explore the Cub Cadet RZT 50 Problems

Effective Solutions

Addressing Power Take-Off (PTO) problems in your Cub Cadet RZT 42 can extend the life of your mower and ensure it operates efficiently. The following are practical solutions and preventive maintenance tips to tackle common PTO issues.

First, if you suspect a faulty PTO switch, start by checking the switch for continuity using a multimeter. If the switch is defective, replacing it is straightforward.

 Disconnect the battery, remove the damaged switch, and install the new one, ensuring all connections are secure. Reconnect the battery and test the new switch to confirm proper operation.

Damaged connections can also cause PTO issues. Inspect the wiring harness for any signs of wear or damage.

 If you find any frayed or broken wires, use wire strippers to remove the damaged section and reconnect the wires using appropriate connectors. Ensure all connections are insulated and secure to prevent future issues.

A blown fuse can disrupt the PTO system. Locate the fuse box, typically found near the engine, and check for any blown fuses. Replace any defective fuses with ones of the same rating. This simple fix can often resolve PTO problems instantly.

Mechanical issues, such as a malfunctioning PTO clutch, require more attention. To adjust or replace the PTO clutch, ensure the mower is on a flat surface and disconnect the battery. 

For adjustment, locate the adjustment bolts and tighten or loosen them as needed. If replacement is necessary, remove the old clutch and install a new one, ensuring all bolts are torqued to the manufacturer’s specifications.

Regularly checking the belt for wear and tension is crucial. Inspect the belt for cracks, fraying, or glazing. If the belt is worn, replace it following the manufacturer’s guidelines. Proper belt tension is essential to avoid slippage and ensure smooth operation.

2. Starting Problems 

Cub Cadet RZT 42

One of the most common issues is a completely non-responsive engine, which can be attributed to various underlying problems.

A prevalent cause of starting issues is battery-related problems. Users might experience a scenario where turning the key results in no lights or sound, indicating a potentially dead battery. 

An aged or insufficiently charged battery is often the culprit here. Regular maintenance and checking the battery voltage can help mitigate this issue.

Another frequent issue involves the starter motor. A defective starter motor may be indicated by a clicking noise when the ignition key is turned, with no engine turnover. 

This can be due to worn-out components within the starter motor itself or issues with the solenoid. In such cases, inspecting the starter motor and its connections can reveal the root cause.

Fuel system malfunctions also contribute to starting problems. Users might notice the engine cranks but fails to start, which could be due to clogged fuel filters or a faulty fuel pump. Ensuring the fuel system is clean and functional can prevent such issues from arising. 

Additionally, stale fuel or incorrect fuel types can further complicate starting efforts, so it’s essential to use fresh, appropriate fuel for the Cub Cadet RZT 42.

Based on user reviews and expert opinions, these starting issues are relatively common. Statistical data suggests that battery problems account for approximately 40% of starting issues, while starter motor and fuel system problems comprise around 30% and 20%, respectively. 

The remaining 10% can be attributed to miscellaneous causes such as electrical wiring issues or safety switch malfunctions.

Understanding these common starting problems allows users to better diagnose and address the issues they might encounter with their Cub Cadet RZT 42, ensuring smoother operation and reduced downtime. Also explore the Cub Cadet LTX 1050 problems.


One of the most common starting problems is related to the battery. To troubleshoot, begin by checking the battery voltage using a multimeter. The battery should read around 12.6 volts when fully charged. If the voltage is low, recharge or replace the battery as necessary. 

Additionally, inspect and clean the battery terminals. Corrosion can inhibit proper electrical flow, so removing any buildup with a wire brush and ensuring tight connections can resolve starting issues.

Another crucial component is the starter motor. To test it, first ensure that the battery is fully charged. 

Next, listen for a clicking sound when you turn the ignition key, which indicates the starter solenoid is engaging. If you hear no sound, the starter motor may need replacement. 

In some cases, tapping the starter lightly with a hammer can temporarily resolve the issue by freeing up the internal components.

Fuel system maintenance is equally important. Begin by inspecting the fuel filter; a blocked filter can prevent fuel from reaching the engine. Change the fuel filter if it looks dirty or blocked.

Additionally, ensure that the fuel is fresh; old or contaminated fuel can lead to starting problems. During the off-season, adding a fuel stabilizer can help preserve the integrity of the fuel system.

3. Clutch Problems 

Cub Cadet RZT L 54 clutch

Clutch problems are among the most frequently reported issues by users, affecting the mower’s performance and reliability.

One prevalent issue is clutch slippage. This occurs when the clutch does not fully engage, leading to a noticeable loss of power. 

Symptoms of clutch slippage include the mower struggling to maintain speed, especially uphill, and an increase in engine RPMs without a corresponding increase in mower speed. This can result from worn clutch plates or improper adjustment of the clutch mechanism.

Another common problem is engagement issues, where the clutch fails to engage smoothly or at all. Users might hear unusual noises such as grinding or clicking when attempting to engage the clutch. 

This issue can stem from a misalignment of the clutch components, debris accumulation, or a failing clutch solenoid. Engagement problems can significantly impair the mower’s functionality, leading to prolonged downtime and potential damage to other components.

Complete clutch failure is perhaps the most severe issue, rendering the mower inoperable. This can happen suddenly or as a result of ignoring earlier symptoms like slippage and engagement problems. 

Indications of a complete clutch failure include the mower not moving despite the engine running and the clutch being engaged. This situation often requires a full clutch replacement or extensive repairs, which can be costly and time-consuming.

Data from user reports and expert evaluations indicate that these issues are relatively common, with clutch slippage and engagement problems being the most frequently encountered. 

By familiarizing yourself with the symptoms and causes of these common clutch problems in the Cub Cadet RZT 42, you can take proactive steps to address them promptly, thereby minimizing downtime and maintaining the overall efficiency of your mower. Also explore the Cub Cadet LTX 1045 problems.


Once you’ve identified the specific clutch problem, the next step is finding an effective solution. For clutch slippage, one of the primary actions is to check and adjust the clutch cable. 

Over time, the cable can become loose or stretched, which affects the clutch’s ability to engage properly. It’s crucial to ensure that the cable is neither too tight nor too loose. 

Additionally, inspect the clutch disc for signs of wear and tear. A worn-out clutch disc can lead to slippage, necessitating its replacement to restore optimal performance.

Engagement problems often arise from issues with the clutch solenoid. Over time, dirt and debris can accumulate, impairing its function. 

Cleaning the solenoid thoroughly can often resolve minor issues. However, if the solenoid is damaged or excessively worn, replacement is the best course of action. 

Ensure that all electrical connections related to the solenoid are secure and free from corrosion, as poor connections can lead to intermittent engagement problems.

In cases of complete clutch failure, replacing the clutch assembly is necessary. This process involves several steps and requires specific tools and parts. 

Essential tools include a socket set, screwdrivers, and a wrench set. Key parts include a new clutch assembly and, if needed, a new clutch cable. 

Follow the manufacturer’s guidelines for disassembly and reassembly to ensure proper installation. It’s advisable to consult the user manual or seek professional assistance if you’re unfamiliar with this procedure.

4. Engine Problems

Cub Cadet RZT 42 engine

One of the most frequent issues is difficulty in starting the engine. This problem can often be traced back to a faulty spark plug, which may be worn out or improperly gapped.

Another common cause is a clogged fuel line or a dirty carburetor, both of which can restrict fuel flow and prevent the engine from starting smoothly.

Engine stalling is another prevalent problem that Cub Cadet RZT 42 owners might face. This issue can occur when the engine suddenly loses power and shuts down, often due to an air filter blockage. 

A dirty or blocked air filter can limit airflow to the engine, which might cause it to stall. 

Additionally, fuel system issues such as a contaminated fuel tank or a failing fuel pump can also lead to engine stalling.

Overheating is a critical issue that can cause significant damage to the engine if not addressed promptly. Overheating can result from various factors, including low coolant levels, a malfunctioning cooling fan, or debris blocking the cooling fins. 

Regular maintenance and cleaning of the cooling system components are essential to prevent overheating and ensure the engine operates at optimal temperatures.

Unusual noises emanating from the engine can also indicate underlying problems. These noises might include knocking, grinding, or hissing sounds. 

Such noises could be symptomatic of issues like loose or damaged engine components, low oil levels, or a failing belt. Identifying the source of these noises early can help prevent more severe damage and costly repairs.

Understanding these common engine problems and their root causes is crucial for maintaining the performance and longevity of your Cub Cadet RZT 42. 

Regular maintenance, timely replacement of worn-out parts, and proper troubleshooting can help you address these issues effectively, ensuring your mower remains in good working condition. Also explore the Cub Cadet LTX 1040 problems.


Maintaining the engine of your Cub Cadet RZT 42 is essential for ensuring its longevity and optimal performance. Here are some practical solutions and maintenance tips to address and prevent common engine problems:

  • Checking and Replacing Spark Plugs: Faulty spark plugs can cause engine misfires or difficulty starting. To troubleshoot, first, locate the spark plugs and inspect them for wear or damage. If the spark plugs appear corroded or dirty, it’s advisable to replace them. Use a spark plug wrench to remove the old plugs and install new ones, ensuring they are correctly gapped according to the manufacturer’s specifications.
  • Cleaning or Replacing Air Filters: A clogged air filter can restrict airflow, leading to poor engine performance. To address this, remove the air filter cover and take out the filter. If the filter is reusable, clean it with compressed air or wash it with mild soap and water. If the filter is disposable, replace it with a new one. Ensure the filter is dry and properly seated before reassembling.
  • Ensuring the Fuel System is Functioning Correctly: Fuel system issues can result in engine stalling or rough idling. Begin by checking the fuel lines and filter for blockages or leaks. Change the fuel filter if it looks dirty or blocked. Also, make sure the fuel tank is clean and use high-quality fuel to avoid contamination. Regularly adding a fuel stabilizer can also help maintain fuel system integrity.

Preventive Maintenance Tips:

  • Regular Oil Changes: Change the engine oil according to the manufacturer’s recommendations to keep the engine running smoothly. Fresh oil lubricates the engine components and reduces friction.
  • Using High-Quality Fuel: Always use clean, high-grade fuel to minimize the risk of debris and contaminants entering the engine.
  • Routine Engine Inspections: Periodically inspect the engine for any signs of wear, leaks, or loose connections. Fixing small issues quickly can stop them from becoming big problems.

 5. Uneven Cutting

Cub Cadet RZT 42standing on the grass

One of the primary reasons is blade issues. Dull or damaged blades can result in an inconsistent cut as they struggle to slice through the grass evenly. 

Regular inspection and sharpening or replacing of blades can mitigate this problem. Ensuring that blades are clean and free from debris buildup is equally important, as a clogged blade can reduce cutting efficiency.

Another significant factor is the deck level. An improperly leveled deck can cause the mower to cut unevenly, with one side cutting lower or higher than the other. 

This discrepancy can be rectified by adjusting the deck height to ensure it is parallel to the ground. Regularly checking and calibrating the deck level is crucial for maintaining a consistent cut across your lawn.

Tire pressure also plays a crucial role in achieving even cutting. Inconsistent tire pressure can cause the mower to tilt, leading to an uneven cut. 

Ensuring that all tires are inflated to the manufacturer’s recommended pressure levels can prevent this issue. Regularly checking tire pressure and making necessary adjustments can help maintain the mower’s balance and ensure an even cut.

Balanced blades are essential for optimal mower performance. Unbalanced blades can cause vibrations that lead to uneven cutting.

It is important to balance the blades regularly to ensure smooth operation. Additionally, clean blades free from debris buildup contribute to a consistent and efficient cut.

Finally, worn or damaged spindles and pulleys can impact the mower’s cutting performance. The spindles and pulleys play a crucial role in the blade’s rotation and overall functionality. 

Inspecting these components regularly and replacing any worn or damaged parts can help maintain the mower’s cutting efficiency.

Understanding and addressing these common causes can help ensure that your Cub Cadet RZT 42 performs optimally, providing a clean and even cut for your lawn. Also explore the Cub Cadet xt1 problems.


Addressing uneven cutting issues with your Cub Cadet RZT 42 often begins with the mower blades. Regularly sharpening and replacing the blades is crucial. 

Dull blades tear grass rather than cut it, leading to an uneven appearance. It’s recommended to sharpen mower blades after every 25 hours of use. To replace the blades, ensure the mower is turned off and the spark plug is disconnected. 

Use a wrench to remove the blade bolt, replace the old blade with a new one, and securely fasten the bolt. Remember to check blade sharpness frequently and replace blades annually or as needed for optimal performance.

Properly leveling the mower deck is another essential step in achieving an even cut. Begin by parking the mower on a flat surface and lowering the deck to its lowest position. 

Measure the distance from the ground to the blade tip on both sides of the deck. Adjust the deck height until both sides are even, using the deck lift links. 

For a more detailed guide, refer to the mower’s manual, which provides specific instructions tailored to your model.

Ensuring correct tire pressure is vital for maintaining an even mow. Uneven tire pressure can cause the mower deck to tilt, resulting in an inconsistent cut. 

Check the tire pressure with a gauge and adjust it according to the manufacturer’s recommendations, which are typically found in the owner’s manual. Consistent tire pressure helps maintain a balanced deck and a uniform cut.

Cleaning and balancing the blades are equally important. Grass clippings and debris can accumulate on the blades, causing imbalance and uneven cutting. 

Regularly clean the blades with a brush and soapy water. After cleaning, check the balance by placing the blade on a balancer or a nail. If the blade tilts to one side, grind the heavier side until it balances evenly.

Lastly, inspect and replace worn or damaged spindles and pulleys. These components can wear out over time, leading to an uneven cut. 

To inspect, remove the mower deck and check for any visible signs of wear or damage. If you find any issues, replace the spindles or pulleys following the manufacturer’s instructions. Regular maintenance of these parts ensures smooth operation and a consistent cut.


By following this guide you can easily get rid from the Cub Cadet RZT 42 problems because here I provide the complete guide about it.

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