John Deere F725

The John Deere F725 is a lawn and garden tractor that was produced by the John Deere company from 1992 to 2001. The F725 was available with either a 38″ or a 42″ mower deck.

It came standard with an 18hp Kawasaki engine, but a 20hp Kohler engine was also available as an option.

The F725 was a popular tractor, but it did have some issues. Some common problems that owners reported were engine blowout, deck coming off, engine hard to start, mower shutting off etc.

But these problems are not really complicated; you can easily fix them.

In this blog post we will take a look at some of the common John Deere F725 problems and their solutions.

John Deere F725 Problems

John Deere F725 Problems

1. Blowout Problem

The John Deere blowout problem is a common issue that can occur in John Deere F725. This problem can cause damage to the equipment and may lead to decreased performance. 

In order to avoid this problem, it is important to understand the causes and how to fix it.

One of the main causes of the John Deere F725 blowout problem is the incorrect deck pitch. If the deck pitch is not set correctly, it can cause the blades to hit each other and create a blowout.

Another common cause of this problem is using incorrect blades. If you are not using the right blades for your equipment, it can cause a blowout. Additionally, using double-blade combos can also lead to this problem.

In order to fix the John Deere blowout problem, you first need to identify what is causing it. Once you have identified the cause, you can take steps to fix it.

One of the best ways to prevent this problem from occurring is by ensuring that your deck pitch is set correctly and by using the appropriate blades for your equipment.

2. Mower Smokes a Lot

The John Deere F725 has a smoking problem on starting. It will randomly puke a huge cloud of blue smoke.

The John Deere F725 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 F725 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 take your tractor to a mechanic for further diagnosis and repair.

Second , check the engine oil level and quality. If the oil is old or dirty, it could be causing the engine to smoke. Change the oil and see if that fixes the problem.

Third, inspect the spark plugs and wires. If they are fouled or damaged, they could be causing the engine to misfire and smoke. Replace them with new ones and see if that solves the issue.

If you’ve tried all of these things and your John Deere F725 is still smoking, there may be a more serious problem with the engine that will require professional help to fix.

3. Engine Problem

The John Deere F725 engine is a powerful machine that can provide great results when mowing your lawn. However, like any other machine, the engine may experience some problems from time to time.

Some of the most common engine issues that can occur on the John Deere F725 include cycling down, stalling out, and using incorrect blades.

If your John Deere F725 is experiencing engine problems, there are a few things you can do to try and fix it.

The first thing you should do is check the plugs and plug wires. If either of these are bad or loose, that could be causing the engine problems.

Another thing you can do is check to see if one of the cylinders is not firing. To do this, remove one of the plug wires while the engine is running and see if there is a difference in the sound.

If the engine stalls out completely, try the other one because you may have pulled the plug on the one running cylinder.

If none of these solutions work, you may need to take the machine to a mechanic to have it serviced.

4. Deck Coming Off

The John Deere F725 deck coming off problem is caused by a number of factors, including damage to the deck belt, loose bolts on the sieves, and imbalance in the blades.

If you are experiencing this issue, it is important to inspect the deck and replace any damaged parts.

If you are experiencing the deck coming off problem with your John Deere F725, there are a number of things you can do to fix it.

First, inspect the deck for any damage to the belt. If it is damaged, replace it.

Next, check the bolts on the sieves and make sure they are tight. If they are loose, tighten them.

Finally, check the balance of the blades and make sure they are evenly distributed. If not, correct the imbalance.

5. Engine Backfires

If your John Deere F725 engine 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.

To fix these problems, you can try the following:

  • Accelerate the engine slowly to avoid backfiring.
  • Use the type of gasoline recommended for your lawn mower.
  • Inspect the spark plug and clean or replace it if necessary.
  • Adjust the carburetor so that it is running neither too rich nor too lean.

6. Not Starting

There are a few probable reasons why John Deere F725 might not be starting.

The first possibility is that the mower just ran out of gas, in which case it can be refilled and should start up.

If the battery is draining very quickly after trying to start the engine, then there might be an issue with the starter.

Another possibility is that the filter flex looks to be getting suction from the fuel pump when trying to start it, which could mean that the line to the tank is not clogged but not getting gas.

In any case, a clogged vent in the cap can cause a vacuum in the tank, so loosening the fuel cap is often recommended as a first step.

If none of these solutions work, you might have a problem with the cam or gears on the Kawasaki motor and will need to do some repairs.

7. Keeps Turning Off

Owners of the John Deere F725 front-mowing tractor have been experiencing a problem where the unit suddenly turns off while in use.

There are several potential causes for this issue, the most common of which is that the machine is vapour locking due to a lack of ventilation.

To fix this, you can try keeping the fuel cap loose when you next mow, or alternatively unplugging the vent hose.

If these solutions don’t work, it’s possible that there is a blockage or other restriction causing debris to accumulate and block the fuel line – in which case you’ll need to clean it out.

It’s also important to keep the machine’s interface clean to prevent excessive grass buildup.

Also, make sure that there is no oil or grease present.

8. Blades Problem

When some customers engaged the blades on their John Deere F725 lawn mower, it killed the engine.

To determine the cause of this issue, look under the deck and make sure something (twine, cord, etc.) is not fouling the blade and preventing it from turning.

If there is an obstruction, remove it. If the problem persists, check the seat safety feature to make sure it is properly connected.

Alternatively, if there is a malfunction or lose connection in the seat safety feature, reconnect and tape it. If these solutions do not work, then it is likely that there is a bad bearing in the clutch.

In this case, remove the belt and try to turn the clutch pulley; if it is hard to turn or feels rough, replace the bearing in the clutch.

If you do not replace the bearing immediately, it will eventually lead to damage of the clutch and you will have to buy a new one instead of being able to repair it.

To replace the clutch:

– Remove blade and blade adapter.

– Use a very large vise-grip to remove the spring.

– Remove the bolt holding the clutch arm.

– Disconnect cable from the top side of the machine.

– Remove engine mounting bolts, have another person pull the engine away from the frame while you slide the clutch off.

– Install the new clutch in the reverse order.

What Users are Saying About John Deere F725 Mower?

Some reviewers say that the John Deere F725 mower is a great value for the money, while others find it to be too expensive. 

Many users appreciate the quality of the mower, but some have had issues with the deck rusting prematurely.  

Some users also find the mower to be too big and bulky for their needs. 

Overall, the John Deere F725 mower is a good quality product that should last for many years with proper maintenance.


The John Deere F725 is a great lawn mower for those who have a large yard. However, there are some common problems associated with this model.

Some of the most common problems include the engine not starting, the blades not engaging, and the deck not level.

While these problems can be frustrating, they can usually be easily fixed by following the manufacturer’s instructions. If you experience any of these problems, make sure to contact a John Deere dealer or service center for help.

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