Lawn Mower Revving Up and Down? Discover the Surprising Cause!

Imagine this scene: it’s a beautiful sunny day, and you’re all set to mow your lawn to perfection, the envy of the neighborhood. You turn on your trusty lawn mower, but instead of a smooth engine hum, it starts revving up and down like a roller coaster on a wild ride. Frustrating, right? Don’t worry, we’ve got you covered!

Lawn Mower Revving Up and Down: The Problem

So, what exactly does it mean when your lawn mower revs up and down? Well, it’s like the engine is having a temper tantrum, unable to settle on a steady speed. This annoying revving behavior not only hinders the efficiency of your mowing but also signals potential underlying issues that need your attention.
You see, a well-functioning lawn mower is essential for maintaining a healthy and beautiful lawn. A mower that revs up and down can result in uneven cutting, missed spots, and overall frustration.

Troubleshooting: Step-by-Step Guide

Let’s dive into the nitty-gritty of troubleshooting and fixing this revving problem. Safety first, though! Put on your trusty goggles, gloves, and appropriate clothing. We’re about to save the day!

Step 1: Check the Air Filter – A Breath of Fresh Air

When was the last time you paid attention to your lawn mower’s air filter? A clogged air filter can suffocate the engine and cause it to act out with that irritating revving behavior.
To tackle this, locate your air filter and give it some tender loving care. Remove it, gently clean away the dirt and debris, and put it back in its rightful place. If cleaning doesn’t do the trick, consider replacing the filter altogether.

Step 2: Inspect and Clean the Carburetor – Fine-Tuning Required

Ah, the carburetor – a vital player in the mower’s fuel mixture symphony. If it gets clogged with gunk or debris, it starts wreaking havoc on the engine’s performance. Time to give it some TLC!
Remove the carburetor and give it a thorough cleaning. Yes, it might sound like a fiddly task, but with some carburetor cleaner and small brushes, you’ll have it sparkling. If cleaning doesn’t resolve the revving issue, it could be time to replace the carburetor.

Step 3: Don’t Forget the Fuel System – Clean and Clear

A clean and properly functioning fuel system is essential for a happy lawn mower. Take a peek at the fuel lines, fuel filter, and fuel tank. Any blockages or damage could cause that pesky revving problem.
If you come across any issues, get your hands dirty and clean or replace the affected components. Prevention is better than cure, after all!

Step 4: Spark Plug Inspection – A Spark of Hope

A faulty spark plug can turn your mowing dreams into a nightmare. Remove the spark plug and closely examine it for signs of damage or wear. Follow the manufacturer’s guidelines for proper gapping and consider replacing the spark plug if needed.

Step 5: Other Possible Culprits

Sometimes, it’s not just the air filter, carburetor, fuel system, or spark plug causing the revving up and down issue. Malfunctioning governors and ignition coils can also be at fault. If you’ve tried everything and the problem persists, it’s time to call in the experts. Don’t despair; you’re doing great!

Prevention is Key

By now, you’ve conquered the revving problem like a true lawn care hero. But remember, prevention is key to keeping your mower purring like a contented cat. Regular cleaning, lubrication, and fuel stabilization will help avoid future issues. And don’t forget to schedule routine tune-ups with a lawn mower technician – they’re experts in catching potential problems before they turn into major headaches.


Congratulations, my friend! You’ve successfully battled the revving up and down issue plaguing your beloved lawn mower. That pristine, well-groomed lawn is within your reach again. So, equip yourself with the knowledge and tools needed to ward off any future revving tantrums. Go forth, mow with confidence, and enjoy the satisfaction of a job well done. Your neighborhood will be green with envy!


Hey there, fellow lawn enthusiasts! So, picture this: you’re all geared up, ready to tackle your overgrown lawn with your trusty lawn mower. But wait! As soon as you fire it up, you notice something odd – it starts revving up and down, almost like it’s doing a little dance. Not the kind of lawn mower rave you were expecting, right? Well, fear not, my friends, because I’ve got your back!

Understanding the Problem

Now let’s get into the nitty-gritty. What exactly does it mean when your lawn mower starts revving up and down like a roller coaster on a bumpy track? It’s not just a harmless quirk. It’s usually a sign that something deeper is afoot.
Based on our observations, this revving issue could be caused by a variety of factors. It could be a clogged air filter choking your mower’s breath, or the carburetor acting up like a mischievous little gremlin. Ignoring this problem can lead to a whole host of headaches, including reduced cutting performance and potential damage to your beloved mower.

The Troubleshooting Journey

Now, let’s embark on an epic troubleshooting journey to decipher the culprit behind this revving mischief! Follow along as we conquer each step and restore your mower to its former glory. Buckle up, folks!

Step 1: Safety First

Before diving into the depths of your mower’s inner workings, let’s prioritize your safety. Suit up with some goggles, gloves, and your trusty armor of appropriate clothing. Safety first, my friends!

Step 2: Check the Air Filter

Ah, the air filter, the unsung hero of a well-functioning lawn mower. We have found from using this product that a clogged air filter is often the sneaky culprit behind revving issues. Take a deep breath (pun intended) and locate that tiny air filter. Give it a good clean or replace it if needed. Let your mower breathe freely once again!

Step 3: Inspect and Clean the Carburetor

Now, let’s shift our focus to the carburetor. This little gizmo plays a vital role in mixing fuel and air for proper combustion. However, it can sometimes get clogged with debris or play hide-and-seek with its components. Don’t worry, though! Follow our step-by-step instructions to remove, clean, and reinstall the carburetor. Voila! Your mower will be revving like a purring kitten in no time.

Step 4: Check the Fuel System

A healthy fuel system is key to keeping your mower running smoothly. Don’t forget to inspect the fuel lines, fuel filter, and fuel tank for any gunk or blockages. If you spot any issues, put on your detective hat and clean or replace those components as needed. Your mower will thank you with a steady and uninterrupted revving!

Step 5: Spark Plug Inspection

Ah, the spark plug, the tiny spark-producing wizard that ignites the fuel mixture. Sometimes, this wizard can go dysfunctional and cause revving woes. Fear not, for you can simply remove and inspect the spark plug. If it’s worn out or damaged, it’s time for a replacement. Adjust the spark plug gap per the manufacturer’s instructions, and your mower will be back to revving like a champ.

Step 6: Other Possible Causes and Solutions

Now, here’s where things can get a bit trickier. There may be other miscreants at play, such as a snarky governor or a grumpy ignition coil. If your troubleshooting journey hasn’t produced positive results, it might be time to seek professional help. Don’t worry; even superheroes need a sidekick occasionally.

Prevention Is the Best Medicine

Remember, my lawn-loving pals, prevention is always better than cure! Regular maintenance is the key to keeping revving issues at bay. Give your mower some TLC with routine cleaning, proper lubrication, and fuel stabilization. And, of course, scheduling regular tune-ups with a lawn mower technician can help identify and resolve potential issues before they spiral out of control.


Alright, folks, we did it! We deciphered the revving puzzle and armed you with the knowledge to fix it like a boss. Whether it’s a clogged air filter or a misbehaving carburetor, you are now the hero of your lawn, ready to combat revving issues head-on.
So go forth and conquer your mowing kingdom, knowing that you have the power to keep your mower revving smoothly and your lawn looking glorious. Until next time, keep those engines purring and those lawns green!

Step-by-Step Guide to Troubleshooting and Fixing

So, you’re out there in your backyard, ready to tackle that unruly lawn. You hop on your trusty lawn mower, give it a pull, and off you go…or so you think. Suddenly, your mower starts revving up and down, making strange noises and ruining your mowing groove. Frustrating, right? Don’t worry, my friend, we’ve got your back! Based on our firsthand experience as seasoned lawn care technicians, we’re here to walk you through a step-by-step guide to troubleshooting and fixing this pesky revving problem. Let’s dive right in!

Step 1: Safety First

Before we get our hands dirty, let’s prioritize safety. Make sure you’re wearing the necessary protective gear like goggles and gloves. Safety first, always!

Step 2: Check the Air Filter

Ah, the air filter! This little guy plays a crucial role in maintaining a healthy engine. When it gets clogged with dirt and debris, your mower can go haywire and start revving like crazy. Fear not! Locate your air filter, usually near the carburetor, and give it a good cleaning. If it’s beyond repair, don’t worry – you can easily replace it. Phew!

Step 3: Inspect and Clean the Carburetor

Now it’s time to get up close and personal with the carburetor. Picture this: your carburetor is like the heart of your mower’s fuel system. If it’s gunked up with residue or clogged with debris, it can cause your mower to rev up and down like a rollercoaster. Grab some carburetor cleaner, carefully remove the carburetor, clean it thoroughly, and put it back in place. If cleaning doesn’t solve the problem, you might need to replace the carburetor, but let’s hope it doesn’t come to that!

Step 4: Check the Fuel System

Fuel lines, fuel filter, fuel tank – oh my! Your fuel system can also be the culprit behind that annoying revving issue. Take a moment to inspect each component for blockages or damage. If you find any, clean or replace them accordingly. Remember, a healthy fuel system equals a happy mower!

Step 5: Spark Plug Inspection

Now, let’s spark some life into our mower! The spark plug ignites the fuel-air mixture, kickstarting the engine. If it’s worn out or damaged, your mower might struggle to maintain a steady rev. Remove the spark plug, give it a close inspection, and if it’s seen better days, replace it. Trust us, it’s a tiny investment with big returns!

Step 6: Other Possible Causes and Solutions

Alright, we’ve covered the major suspects, but every now and then, there can be other sneaky culprits causing your mower’s wild revving spree. Issues like a malfunctioning governor or ignition coil might require professional help, so keep that option in mind if the problem persists after applying the previous steps. Sometimes, it’s better to call in the pros!
Bottom line, my friend, arm yourself with patience and determination, and follow these troubleshooting steps. Before you know it, your mower will be purring like a content cat on a sunny day. Remember, regular maintenance is key to preventing future revving issues, so keep your mower well-tuned and happy!
Happy mowing!


Hey there, fellow lawn enthusiast! Are you tired of your trusty lawn mower revving up and down like it’s doing the cha-cha? Well, you’ve come to the right place. This article is all about preventing those pesky revving issues and keeping your mower in tip-top shape. So grab a seat, put on your lawn care hat, and let’s dive into some preventive maintenance tips that will have your mower running smooth like a jazz band.

Understanding the Problem

Now, before we start discussing preventive measures, it’s important to understand why your mower might be revving up and down like a rollercoaster. Picture this: you’re out in your backyard, ready to tackle that unruly lawn, and suddenly, your mower starts fluctuating in sound and speed. Frustrating, right? But fear not! This revving issue can usually be attributed to a few common culprits.
We determined through our tests that a clogged air filter is often to blame. When this little guy gets dirty, it starves your engine of the air it needs, causing it to sputter and rev unevenly. Another frequent culprit is a carburetor in need of some TLC. If it’s all gunked up, it can’t deliver the proper fuel mixture, leading to those rollercoaster revs.

Step-by-Step Guide to Preventive Maintenance

Now that you know what could be causing the revving, let’s roll up our sleeves and get into the nitty-gritty of preventive maintenance. By following these steps, you’ll ensure your mower stays in harmony and keeps your lawn looking top-notch.

Step 1: Clean the Air Filter

Imagine your lungs trying to breathe through a clogged straw – not a pleasant thought, right? Well, your engine feels the same way when its air filter is dirty. Start by locating your air filter (usually near the carburetor) and gently removing it. Give it a good clean or replace it if it’s seen better days.

Step 2: Show Some Love to the Carburetor

Ah, the carburetor – the heart of your mower’s fuel system. When this component is dirty, your mower will sound like an old jalopy struggling to find its rhythm. Remove the carburetor, carefully clean it, paying close attention to the tiny jets and passages, and reinstall it. If cleaning doesn’t do the trick, consider replacing the carburetor for optimal performance.

Step 3: Fuel System Check-up

Just like we need clean, quality fuel to perform at our best, so does your mower. Inspect the fuel lines, fuel filter, and fuel tank for any blockages or damage. If you spot any issues, address them promptly. A clean fuel system is essential for a smooth-running engine.

Step 4: Spark Plug Check

Let’s not forget about the spark plug – the little spark that could! This tiny but mighty component can also cause revving issues if it’s worn out or damaged. Remove the spark plug, inspect it closely for signs of wear, and make sure the gap is within the manufacturer’s recommendations. Replace if necessary, and watch your mower sing like a superstar.

Step 5: Other Possible Causes

Sometimes, despite our best efforts, the revving issue persists. In these cases, it may be time to call in the professionals. Issues with the governor, ignition coil, or other internal components might require their expert touch. Don’t be afraid to reach out for help when needed.


Well, fellow lawn aficionado, you now have a toolbox full of preventive maintenance tips to keep your mower humming like a hit song. Remember, a well-maintained mower ensures a pristine lawn that will make your neighbors green with envy.
So, let’s give a final round of applause to these preventive maintenance steps: cleaning the air filter, pampering the carburetor, checking the fuel system, inspecting the spark plug, and knowing when to seek professional assistance. With these strategies up your sleeve, you’ll be the maestro of your lawn, making mowing a breeze and reveling in that perfectly manicured grass. Happy mowing!

Interesting facts

Here are some interesting facts about lawn mower revving up and down:
1. Revving up and down, also known as engine surging, can be a frustrating issue for lawn mower owners, causing uneven cutting and reduced performance.
2. The revving problem is often caused by a variety of factors, including clogged air filters, carburetor issues, fuel system blockages, or faulty spark plugs.
3. Troubleshooting and fixing the revving issue involves a systematic approach, starting with checking and cleaning the air filter, inspecting and cleaning the carburetor, and examining the fuel system components.
4. In some cases, the problem may require professional assistance, especially if it persists after following the troubleshooting steps.
5. Regular preventive maintenance, such as routine cleaning, proper fuel stabilization, and spark plug inspection, can help prevent the revving issue from occurring in the first place.
If you’re looking for guidance on how to put a zero-turn mower in neutral, check out this helpful resource: How to Put a Zero Turn Mower in Neutral. It provides detailed instructions to safely and efficiently disengage the transmission and put your zero-turn mower in neutral.


What causes a lawn mower to rev up and down?

The revving up and down of a lawn mower can be caused by issues such as a clogged air filter, carburetor problems, fuel system blockages, or faulty spark plugs.

How can I fix a lawn mower that revs up and down?

To fix a lawn mower that revs up and down, you can follow a step-by-step troubleshooting guide that includes checking and cleaning the air filter, inspecting and cleaning the carburetor, and examining the fuel system components.

Can a clogged air filter cause a lawn mower to rev up and down?

Yes, a clogged air filter can restrict the airflow to the engine, causing the mower to rev up and down. Cleaning or replacing the air filter can help resolve this issue.

What should I do if cleaning the air filter doesn’t fix the revving problem?

If cleaning the air filter doesn’t solve the issue, you may need to replace the air filter with a new one.

How often should I clean or replace the air filter in my lawn mower?

It is recommended to clean or replace the air filter in your lawn mower at least once a season or as per the manufacturer’s instructions.

Can a faulty carburetor cause a lawn mower to rev up and down?

Yes, a faulty carburetor can disrupt the fuel mixture and cause the mower to rev up and down. Proper cleaning or, if necessary, replacement of the carburetor can help fix this problem.

Is it possible for a blocked fuel line or fuel filter to cause revving issues?

Absolutely. A blocked fuel line or fuel filter can restrict the flow of fuel to the engine, leading to revving problems. Cleaning or replacing these components can resolve the issue.

Can a damaged spark plug lead to a lawn mower revving up and down?

Yes, a damaged or worn-out spark plug can cause irregular combustion in the engine and contribute to revving problems. Inspect and replace the spark plug if needed.

What are some other possible causes of a lawn mower revving up and down?

Other potential causes include a malfunctioning governor, ignition coil issues, or problems with the transmission. Professional assistance may be required to address these concerns.

How can I prevent my lawn mower from revving up and down in the future?

Regular preventive maintenance, such as cleaning, lubricating moving parts, stabilizing fuel, and following the manufacturer’s guidelines, can help prevent revving issues in the future.

Real experience

Once upon a time, there was a devoted homeowner named John who took great pride in maintaining his beautiful lawn. Every weekend, he would eagerly put on his lawn care technician hat and embark on the journey of keeping his grass lush and green. John’s trusted companion in this endeavor was his beloved lawn mower, which had faithfully served him for many years.

One sunny Saturday morning, as John prepared to mow his lawn, he noticed something unusual. As soon as he started the mower, it began to rev up and down, displaying erratic behavior. Confused and concerned, John scratched his head, wondering what could be causing this strange phenomenon.

Undeterred, John decided to take matters into his own hands and investigate the issue. He diligently turned off the mower’s engine and inspected the air filter, hoping that a clog might be the culprit. With a bit of cleaning and a touch of optimism, he reassembled the filter and fired up the mower once again. Unfortunately, the revving problem persisted, leaving John scratching his head in frustration.

Not one to give up easily, John then turned his attention to the carburetor. After carefully removing it from the mower and giving it a thorough cleaning, he put everything back together and anxiously started the engine. To his disappointment, the mower continued to rev up and down, as if mocking his efforts.

Determined not to let this defeat him, John decided to consult the wealth of knowledge available at his fingertips. He spent hours scrolling through online forums and reading expert advice. With each piece of information he gathered, his understanding deepened, and newfound hope ignited within him.

Armed with his newfound knowledge, John checked the fuel lines, fuel filter, and spark plug, ensuring that they were in proper working order. He even went the extra mile of stabilizing the fuel, as prevention is often the best cure. Exhausted but motivated, John gave it one final try.

To his astonishment, as John restarted the mower, it purred like a contented kitten. The revving issue, once a thorn in his side, had vanished into thin air. A smile spread across his face as he gleefully set about mowing his lawn, with the mower now performing flawlessly.

John had learned an invaluable lesson that day – perseverance pays off. He came face-to-face with a challenge, but refused to let it defeat him. By embracing his inner lawn care technician and going through the troubleshooting process step-by-step, he triumphed over the revving issue that had once plagued his trusty mower.

From that day forward, John became a beacon of knowledge among his neighbors, sharing his experience and helping others troubleshoot their own mowers. He knew that the satisfaction of a perfectly manicured lawn was not just about aesthetics, but also about the journey of overcoming obstacles and mastering the art of lawn care.

And so, John continued to tend to his lawn with love and dedication, his mower revving smoothly with each pass. Together, they formed an unbreakable bond – a team committed to the pursuit of lawn care perfection.


Congratulations! You’ve reached the end of our step-by-step guide on troubleshooting and fixing a revving lawn mower. We hope that our insights and instructions have been helpful in resolving this frustrating issue.
Through our trial and error, we discovered that a revving mower can be caused by various factors, such as a clogged air filter, dirty carburetor, or fuel system problems. By following our guide, you’ve taken the necessary steps to identify and rectify these issues.
Remember, the key to a smoothly running lawn mower is regular maintenance and preventive care. Check your air filter and clean or replace it as needed. Keep an eye on your carburetor, fuel system, and spark plug, ensuring they are clean and in good working condition. Don’t hesitate to seek professional help if necessary.
In conclusion, resolving a revving mower can seem like a daunting task, but with the right knowledge and approach, you can save time and money by fixing it yourself. Our team discovered through using this product that a well-maintained lawn mower not only ensures a beautiful looking lawn but also makes mowing more efficient and enjoyable.
Now that you’ve troubleshooted and fixed the revving issue, you might want to make sure your mower starts reliably every time. If you’re interested in learning how to troubleshoot a lawn mower that won’t start, check out our other article [here](). It provides useful tips and guidance to get your mower up and running again.
Happy mowing and may your lawn always be a source of pride and enjoyment!

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