How to Fix a Self Propelled Lawn Mower

There’s nothing quite as satisfying as a perfectly manicured lawn. However, a self-propelled lawn mower that’s not working properly can make achieving that perfect lawn a frustrating experience.

How to Fix a Self Propelled Lawn Mower

Thankfully, if you’re handy, you can probably fix most issues with your self-propelled lawn mower yourself. In this blog post, we’ll explore some of the most common problems with self-propelled lawn mowers and how to fix a self propelled lawn mower.

Can You Fix a Self Propelled Lawn Mower?

When maintaining a beautiful yard, a self-propelled lawn mower can be a true lifesaver. However, even the most reliable machines can experience malfunctions from time to time. If you find yourself in a situation where your lawn mower is not working as it should, don’t fret just yet. With a bit of patience, know-how, and the right tools, fixing a self-propelled lawn mower is totally doable. From checking the air filter to inspecting the spark plug, you can take several simple steps to troubleshoot and fix any issues that arise. So, roll up your sleeves, and let’s get to work!

Why Should You Fix a Self Propelled Lawn Mower?

A self-propelled lawn mower is an excellent tool for anyone who wants to keep their lawn looking neat with minimal effort. However, if your mower is not working as it should, you must consider getting it fixed as soon as possible.

Not only can a faulty self-propelled system make mowing your lawn more of a hassle, but it can also have negative effects on the health of your lawn. By fixing your self-propelled lawn mower, you can ensure that your mower is running at its best, and it can help you save time and money in the long run. So, if you’re using a self-propelled lawn mower and it’s not working how it should, it’s worth considering fixing it.

A Comprehensive Guide on How to Fix a Self Propelled Lawn Mower

1. No traction

If your self-propelled lawn mower isn’t moving forward when you engage the drive system, the first thing to check is the drive belt. The belt may be loose or worn and should be tightened or replaced. Alternatively, if the gears in your mower’s transmission are worn out or damaged, you may need to replace the transmission to restore traction.

2. Poor Cutting Performance

If your self-propelled lawn mower is not cutting properly, it could be a few issues. The most common culprits are blunt blades, a clogged deck, or a buildup of debris underneath the deck. Consider removing and sharpening the blade or replacing it altogether in case of any cracks, dents, or excessive wear.

To clean the deck, remove the debris stuck under it by scraping or flushing it with a hose. Always remove the spark plug first, and remember to use gloves.

Remove the Debris Stuck Under It by Scraping

3. Engine Issues

If your self-propelled lawn mower engine doesn’t start, the fuel may be stale if it has been sitting in the machine for a long time. Try emptying the float bowl and filling it with fresh gas. If that doesn’t work, check whether the air filter is blocked. A dirty or clogged air filter can restrict airflow to the engine, causing it not to run or function at a higher capacity. Check to make sure the filters are in good condition and replace them if necessary.

4. Damaged Wheels

The wheels on your self-propelled lawn mower could be damaged or worn out, hence not providing proper navigation and mobility. Check if they wobble or waver when the mower starts engaging, or better yet, lift it up and inspect the wheels individually to identify damaged areas. If the tires are flat, inflate them to the recommended pressure. If that’s not the problem, you may need to replace the wheels entirely.

5. Broken Cables

If you pull on the drive cable and there is no tension or feel tension but no response on the self-propelled clutch, the cable may be broken or worn. You can easily replace the cable. Loosen where it attaches the self-propelled mechanism and the engine, or remove it altogether if necessary. After removing the damaged cable, thread the new one in the same path as the old cable, tightening nuts and bolts down the path.

Removing the Damaged Cable

6. Unresponsive Self-Propel System

If your self-propelled lawn mower’s drive system isn’t responding when you engage it, the problem may be a worn or broken drive belt. You can replace the belt by loosening and removing the blade drive belt to access the self-propelled drive belt underneath. Replace with new belts, making sure they are aligned properly before tightening.

7. Difficulty Starting

If your self-propelled lawn mower is difficult to start, prime the engine by pressing and releasing the primer bulb six times before attempting to start it. If that doesn’t work, check whether there is enough oil in the engine, as low oil levels can cause starting issues. Also, try cleaning or replacing the spark plug, as a worn or dirty spark plug can also make it difficult for the mower to start.

If none of these solutions work, it may be time to have a professional check the mower for any other underlying issues. Following these troubleshooting tips, you can keep your self-propelled lawn mower running smoothly and effectively for years. Always prioritize safety and consult the manufacturer’s manual before repairing or replacing.

5 Considerations Things When You Need to Fix a Self Propelled Lawn Mower

1. Check the Fuel

The first thing you should do when fixing a self-propelled lawn mower is check the fuel. If the fuel level is low, fill it up with fresh gasoline and see if that solves the problem. If the fuel tank is empty or close to empty, try cleaning out any debris from inside the tank before refilling it with new gasoline. Additionally, ensure that all the hoses and connections are tight and free of any leaks.

2. Inspect the Air Filter

The next step in fixing a self-propelled lawn mower is to inspect the air filter. The air filter should be checked regularly for signs of dirt or debris, as these can clog up the engine and prevent it from running properly. If necessary, clean or replace the air filter according to manufacturer instructions.

3. Replace Spark Plugs

If your self-propelled lawn mower isn’t starting up, then you may need to replace its spark plugs. Spark plugs are responsible for igniting the fuel in an engine, so if they become worn or dirty, they won’t be able to do their job properly. Replacing them is relatively easy and can often solve many starting issues with a self-propelled lawn mower.

4. Clean Out Debris

Another common problem with self-propelled lawnmowers is that they become clogged up with debris over time. This debris can accumulate around various parts of the machine, such as blades, pulleys, and belts, preventing them from working correctly or even causing damage if left unchecked for too long. Make sure to clean out any debris from around these areas regularly to keep your lawn mower running smoothly for longer periods without needing repairs.

Debris Can Accumulate Around Various Parts

5. Check Belts and Pulleys

Finally, ensure that all of your self-propelled lawn mower’s belts and pulleys are in good condition before attempting any repairs. Belts can wear out over time due to friction caused by use, while pulleys can become damaged if they come into contact with sharp objects like rocks or sticks while cutting grass. Inspecting these components regularly will ensure that your self-propelled lawn mower runs smoothly for years to come without needing major repairs.

3 Common Mistakes People Make When Trying to Fix a Self Propelled Lawn Mower

1. Not Checking the Spark Plug

One of the most common mistakes people make when trying to fix a self propelled lawn mower is not checking the spark plug. The spark plug is responsible for igniting the fuel in the engine, so if it is damaged or worn out, it can cause the mower to not start. Before attempting any repairs, it is important to check that the spark plug works properly.

If it needs to be replaced, make sure to use a high-quality replacement spark plug that is designed for your particular model of mower.

2. Not Cleaning Out Debris

Another mistake people often make when trying to fix a self propelled lawn mower is not cleaning out any debris that may have accumulated in or around the machine. Over time, dirt and other debris can build up on and around the blades and other mower parts, preventing them from working properly.

It’s important to inspect your mower regularly and remove any debris that has built up. This will help ensure that all parts are functioning correctly and will help extend the life of your machine.

Important to Inspect Your Mower Regularly

3. Not Adjusting Tension Properly

The last mistake people commonly make when trying to fix a self propelled lawn mower is not adjusting tension properly on the drive belt or chain. The tension of these components should be adjusted periodically to ensure proper operation of the machine.

If they are too loose, they can slip and cause damage to other parts of the machine; if they are too tight, they can cause excessive wear on moving parts and reduce efficiency overall. Make sure to refer to your owner’s manual for instructions on how to adjust tension properly on your specific model of mower.


Fixing a self-propelled lawn mower may seem complicated, but it doesn’t have to be. With some basic troubleshooting knowledge, you can quickly identify and repair most issues with your mower. This saves you time and money, ensuring that you have a functional lawn mower every time you need it. Thanks for reading our post about how to fix a self propelled lawn mower.

Leave a Comment