John Deere Z915E: 4 Common Problems and How to Fix Them 

If you own a John Deere Z915E zero-turn mower, you’re probably aware that it’s an incredibly powerful and efficient tool for taking care of your lawn.

Here, we’ll take a look at some of the more common issues associated with the Z915E and suggest a few solutions get you back up and running as quickly as possible.  

Let’s dive in.

John Deere Z915E Common Problems

John Deere Z915E Problems

1. Loss of Power

The most common problem associated with the Z915E is a loss of power.

This can be caused by a clogged air filter, low engine oil levels, a worn spark plug, or a faulty fuel filter. 

To fix this issue, first, check the air filter and replace it if necessary. Next, check the engine oil and top it off if needed.

If the oil looks dark or dirty, it may be time to change it.

The spark plug should also be inspected and replaced if necessary. Finally, check the fuel filter and replace it if it’s clogged or dirty.  

2. Rough Running 

Another common problem with the Z915E is rough running. This can be caused by a dirty air filter, low fuel pressure, or carbon buildup. 

To fix this issue, first, check the air filter and replace it if necessary.

Next, check the fuel pressure and, if needed, adjust it according to the manufacturer’s instructions. 

Finally, clean the carbon buildup from the spark plugs and inspect them for wear.  

3. Hard Starting  

The Z915E can also be prone to hard starting, which can be caused by a faulty spark plug, a weak battery, or a dirty carburetor. 

To fix this issue, first, check the spark plug and replace it if necessary.

Next, inspect the battery and, if needed, charge it or replace it. Finally, clean the carburetor and inspect it for any blockages.  

Read Best Oil for John Deere Riding Mower(Top 3 Oils)

4. Poor Cutting Performance  

Finally, the Z915E can also have poor cutting performance due to a dull blade, a loose mower deck, or clogged blades. 

To fix this issue, first, check the blade and sharpen or replace it if necessary. Next, inspect the mower deck and tighten any loose bolts.

Finally, clean the blades and inspect them for any blockages.  

If you are unable to solve the problems, contact the John Deere support team.

Loss of PowerClogged air filter, low engine oil levels, worn spark plug, faulty fuel filterCheck and replace air filter if necessary, check and top off engine oil, inspect and replace spark plug, check and replace fuel filter if clogged or dirty
Rough RunningDirty air filter, low fuel pressure, carbon buildupCheck and replace air filter if necessary, check fuel pressure and adjust if needed, clean carbon buildup from spark plugs and inspect for wear
Hard StartingFaulty spark plug, weak battery, dirty carburetorCheck and replace spark plug if necessary, inspect and charge or replace battery, clean carburetor and inspect for blockages
Poor Cutting PerformanceDull blade, loose mower deck, clogged bladesCheck blade and sharpen or replace if necessary, inspect mower deck and tighten loose bolts, clean blades and inspect for blockages
John Deere Z915E Problems

Maintenance Tips for John Deere Z915E

  • Regularly check and replace the air filter to prevent clogging and loss of power.
  • Keep the engine oil at the correct level and change it when it appears dark or dirty.
  • Inspect and replace the spark plug as needed.
  • Clean or replace the fuel filter if it’s clogged or dirty.
  • Check and adjust the fuel pressure according to the manufacturer’s instructions.
  • Clean carbon buildup from the spark plugs and inspect them for wear.
  • Inspect the battery and charge or replace it as needed.
  • Keep the carburetor clean and clear of blockages.
  • Keep the blades sharp and clear of blockages.
  • Inspect the mower deck and tighten any loose bolts.
  • Follow the recommended maintenance schedule in the operator’s manual.
  • Keep the machine clean and free of debris, especially after mowing.

Read How to Replace Mower belt on John Deere D130 Diagram

John Deere Z910a Problems

Belt Issues

Some users have reported problems with the mower deck belt, such as excessive wear, improper tension, or frequent breakage.

Regular maintenance and inspection of the belt, as outlined in the product manual, can help prevent these issues.

Engine Troubles

Like any machine, the Z910A may experience engine-related issues. These could include difficulties starting, rough idling, or poor performance.

It’s important to follow the manufacturer’s maintenance schedule and ensure that the engine receives regular servicing to minimize these problems.

Electrical Problems

Some users have encountered electrical issues, such as faulty wiring or problems with the battery and charging system.

Proper maintenance, including checking connections and ensuring the battery is in good condition, can help avoid such problems.

Steering and Transmission

A few users have reported issues with the steering mechanism or transmission on the Z910A. These problems may manifest as difficulty steering or problems with shifting gears.

If you encounter such issues, it’s best to contact a qualified technician for diagnosis and repair.

John Deere Zero Turn Fuse Location

  • Check Under the Seat: One common location for the fuse box is under the seat. Lift the seat and look for a rectangular or square box that houses the fuses. It may have a cover that can be removed to access the fuses.
  • Engine Compartment: In some models, the fuse box might be located in the engine compartment. Open the engine hood or cowling and inspect for a fuse box near the engine or on one of the sides.
  • Operator Platform: Another possible location is under the operator platform or console. If there is a storage compartment or panel on the console, check for the fuse box behind it.

John Deere D130 Mower Belt Diagram

The primary mower drive belt starts from the engine’s pulley and wraps around the mower deck’s electric clutch pulley.

It then loops around the mower deck’s spindle pulleys. The secondary belt connects the engine’s pulley to the transmission pulley.

Read More D130 Belt Diagram Here

Read 11 Reasons Why John Deere D110 Won’t Start(Fixed)

John Deere Z915b Problems

Engine Performance Issues– Engine stalling or not starting properly
– Loss of power or poor performance during mowing
– Overheating issues
Cutting Deck Problems– Uneven cutting or scalping of the lawn
– Excessive vibration or rattling of the cutting deck
Transmission Difficulties– Transmission slipping or not engaging properly
– Difficulties in changing gears or shifting
Electrical System Issues– Electrical components malfunctioning, such as lights or gauges
– Battery or charging problems
Steering and Maneuvering– Steering issues, such as the mower pulling to one side
– Problems with the zero-turn functionality, such as difficulty turning on the spot
Hydraulic System Problems– Hydraulic leaks or fluid loss
– Weak or slow hydraulics
– Hydraulics not responding as expected
Belt and Pully Issues– Belts wearing out quickly or breaking
– Pully misalignment or damage
General Build Quality– Premature wear and tear on various components
– Loose or missing bolts, nuts, or fasteners
– Paint chipping or rusting

Read John Deere MFWD Problems(5 Easy Ways To Fix)

John Deere Z515e Problems

  • Engine Troubles: Difficulty starting the engine, engine stalling, loss of power, or rough running
  • Cutting Issues: Uneven cutting, scalping of the lawn, or blades not engaging properly
  • Transmission Difficulties: Problems with shifting gears or the mower not moving as expected
  • Electrical System Malfunctions: Issues with lights, gauges, or electrical components not functioning correctly
  • Steering and Maneuverability: Steering problems or difficulties with zero-turn functionality
  • Hydraulic System Leaks or Weakness: Hydraulic fluid leaks or sluggish hydraulics
  • Belt and Pully Problems: Premature wear or breakage of belts and issues with pully alignment


Where is the John Deere z915e fuse location?

The fuse location on the John Deere Z915E is in the engine compartment under the seat. There is a fuse box located on the left-hand side of the engine.

What engine is in a John Deere Z915E?

The John Deere Z915E is powered by a Kawasaki FS730V engine powered by a liquid-cooled, 3-cylinder, 4-cycle gasoline engine with a displacement of 0.7 L and a gross horsepower of 17.5 HP.

How much does a John Deere Z915E weigh?

The John Deere Z915E zero-turn mower has an approximate dry weight of 575 lbs. It has a total weight, including the operator, of 1,103 lbs. 

The mower deck on the Z915E has a cutting width of 48 inches and a cutting height range of 1 to 5 inches.

What are some common problems experienced with the John Deere Z915E mower?

While the John Deere Z915E is a reliable mower, a few common problems may arise.

These include issues with the engine starting, belt slippage, cutting blades not engaging, uneven cutting, and electrical system malfunctions.

How can I troubleshoot starting issues with my John Deere Z915E?

If you’re experiencing difficulties starting your Z915E, check the fuel level and ensure the fuel valve is open.

Verify that the choke is set correctly and that the spark plug is clean and in good condition. If the problem persists,

It is advisable to consult a John Deere authorized dealer or service center for further assistance.

What should I do if the cutting blades of my Z915E are not engaging?

If the cutting blades fail to engage, start by inspecting the mower’s drive belt for any signs of damage or wear.

Check that the belt is properly tensioned and routed.

Also, examine the electrical connections and safety switches related to the blade engagement system.

If the issue persists, seek professional help to diagnose and fix the problem.

Read John Deere Fuel Filter Not Full(3 Quick Ways To Fix)

How can I resolve uneven cutting patterns with my Z915E?

Uneven cutting can be caused by various factors, such as dull or damaged blades, an improperly adjusted deck, or uneven tire pressure.

Begin by sharpening or replacing the blades if necessary.

Adjust the deck height to ensure it is level, and consult the operator’s manual for specific instructions.

Finally, check the tire pressure and ensure it is even on all tires.

What should I do if I’m experiencing electrical system malfunctions with my Z915E?

If you encounter electrical system malfunctions, start by inspecting the battery connections to ensure they are clean and secure.

Check the fuses and replace any blown ones.

If the issue persists, consult the wiring diagram in the operator’s manual to trace and troubleshoot the problem.

For complex electrical issues, it is recommended to contact a qualified technician or authorized John Deere service center for assistance.

Read 10 Common John Deere S240 Problems(With Solution)

Final Remarks

The John Deere Z915E is a powerful and efficient zero-turn mower. 

However, it can be prone to a few common problems, such as loss of power, rough running, hard starting, and poor cutting performance.

Luckily, most of these issues can be easily fixed with a few simple steps.

Read How to Replace Mower belt on John Deere D130 Diagram

George Bill
George Bill

George Bill is a Mechanical Engineer by Profession and an avid gardener and has been mowing his lawn for over 20 years. He has used a variety of different mowers during this time.
George is an expert at maintaining his mowers and over the years, he has learned many tricks and techniques for getting the best results from his mowers and is always happy to share his knowledge on this site.