John Deere Z915E

The John Deere Z915E is one of the most popular zero-turn mowers on the market. 

But like any other machine, it’s not perfect and can have some problems. 

In this article, we’ll take a look at some of the most common John Deere Z915E problems and how to fix them.

Common John Deere Z915E Problems

John Deere Z915E Problems

1. Starting Problem

The John Deere Z915E is a great mower for those who have a lot of land to take care of. 

However, I have seen some complaints about the bad start and not starting the engine at all. 

There are several reasons why this might be happening, but here are a few things you can do to troubleshoot the problem.

  • First, make sure that there is enough fuel in the tank. If not, top it up and try again.
  • Secondly, replace the dirty fuel or if the fuel has been standing for a few months.
  • Moisture can find its way into the fuel tank and stop the engine from starting.
  • Finally, check for any damaged wires or fuse issues.
  • If everything looks good, then it might be time to take it in for servicing.

Also, make sure to read the manual before starting up the engine. Maybe something was missed during the last use.

So,  these are a few things to keep in mind if you’re having trouble starting up your John Deere Z915E. With a little troubleshooting, you should be able to get it up and running in no time.

2. Steering Wheel Problem

Steering problems can occur in the John Deere Z915E for a variety of reasons.

One common problem is incorrect tire pressure. If the tires are not properly inflated, it can cause the steering gear to slip, and make it difficult to manoeuvre the mower.

Another common issue is worn or damaged wheel bearings. These can cause the steering to become wobbly or difficult to control.

Finally, debris on the lawn can also cause problems with the steering. If there are a lot of sticks, rocks, or other objects on the lawn, it can interfere with the mower’s ability to move smoothly and accurately.

Therefore, it is important to check the tire pressure regularly and to clear any debris from the lawn before mowing.

If you notice any steering problems, be sure to have the mower checked by a qualified technician to ensure that nothing is damaged or worn.

3. Hydraulic Pump Failure

The most common problem encountered by the users with the Hydraulic pump of this mower is the mixture of water and air.

Very often, the pump becomes full of air instead of oil, and as a result, it cannot generate enough pressure needed to provide power. This problem is commonly known as cavitation.

Sometimes air enters the pump cavity from outside. Loose connections or leaks can be responsible for this.

Aeration creates a knocking sound when the pump is running.  Sometimes the temperature of hydraulic fluid gets too high.

So, you need to maintain the hydraulic system properly in order to avoid these problems.

Instead of air, if there is any other foreign particle in the hydraulic system, it can cause damage to the pump. So, it is important to keep the system clean.

It is advisable to change the oil and filter regularly. This will help to remove any contaminants from the system and will also maintain the proper viscosity of the oil.

If you follow these tips, you can keep your hydraulic pump working properly for a long time.

4. Smoking on Startup

The John Deere Z915E has a smoking problem on starting. It will randomly puke a huge cloud of blue smoke.

The John Deere Z915E is smoking because there is something wrong with the engine. It’s possible that there is too much fuel entering the engine, which is causing it to run poorly and smoke.

Alternatively, the issue could be with the air intake or combustion process.

If your John Deere Z915E is smoking, there are a few things you can do to try and fix the problem.

First, make sure that the air filter is clean and that there is no debris blocking the engine. If the air filter is clean and the problem persists, you may need to adjust the carburetor.

Finally, if the problem still persists, you may need to take the Z915E to a John Deere dealer or qualified mechanic for further diagnosis and repair.

5. Backfires

Backfiring is another problem that a lot of people complain about. If your John Deere Z915E is backfiring, there are a few things you can do to try and fix the problem.

One of the most common reasons for a lawn mower to backfire is decelerating the engine too quickly.

If you’re using a different type of gasoline than what your mower is designed to use, that can also cause problems.

A compromised spark plug or a way the carburetor is set up (running too rich or too lean) can also cause the engine to backfire. 

If the flywheel key is sheared, that can also cause the engine to backfire.

What People are Saying about John Deere Z915E Mower?

These are some reviews of people that already used the John Deere Z915E Mower.

“I’ve been using my 915 for about 5 years now over 3 acres of very rough terrain (old farmland). I’ve not had one problem with it.”

“I love my 915. It gets the job done. Not even a couple hundred hours yet and it’s great. Runs perfectly. It handles 3 acres like a charm.”

“I bought mine 3 years ago and have never had any problems. I use mine for personal use and cut about 2.5 acres of difficult land with hills and several obstacles to cut around. This mower reduced my cutting time by about 45 minutes and is a life saver. All functional systems on this mower are all over built and should last a normal homeowner a lifetime with normal maintenance and care.”

What engine is on a John Deere Z915E?

The John Deere Z915E is powered by an air-cooled, vertical shaft engine. 

This engine provides 25.0 horsepower (18.6 kilowatts) of power, making it ideal for a variety of applications. 

Whether you’re mowing your lawn or completing a commercial landscaping project, the Z915E has the power to get the job done quickly and efficiently.


The John Deere Z915E problems are not as common as some of the other models. However, when they do occur, they can be quite serious. The most common problem is with the engine, which can cause the lawn mower to stall or even catch fire.

Other problems include the transmission, which can cause the lawn mower to jerk or stall, and the deck, which can cause the lawn mower to leave stripes on the lawn.

If you have any of these problems, it is important to take your lawn mower to a qualified technician for repairs.

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