Why Are Lawnmowers So Loud

Do you dread the sound of a loud lawnmower ruining your peaceful Saturday mornings?

Are you tired of being that neighbor who wakes up everyone with the noise of your lawnmower?

Look no further!

In this article, we explore why lawnmowers can be so loud and provide tips and tricks to quiet down your mower.

Not only will your neighbors thank you, but you’ll also protect your hearing from potential hearing loss.

So, grab your earplugs and join us as we explore the world of quiet lawnmowing!

Types of Lawnmower blades

The auditory output of a lawn mower is directly proportional to the rotational velocity of its blades. Lawnmowers that rotate their blades at a slower speed emit less noise than those that rotate at a faster speed.

This is because the slower the blade rotates, the fewer the number of revolutions per minute, resulting in a lower decibel level. Conversely, a lawn mower with a higher blade rotation rate will produce more noise than one with a slower rate.

Various types of blades are available on the market, such as those with flat or curved profiles and blades that come in various sizes and lengths.

Electric mowers vs gas-powered

The sound emitted by a lawn mower is a composite of two distinct sources, the internal combustion engine, and the blades. The former generates a high-pitched frequency, producing a deep tonality. One may opt to utilize a riding lawn mower to achieve expedient lawn cutting while minimizing noise pollution. These tend to be quieter than their push counterparts as they are equipped with larger engines. Additionally, electric lawnmowers are an alternative option, as they lack an internal combustion engine, thus reducing noise output.

Powered Mowers

Electric lawnmowers are notably less noisy when compared to their gas-powered counterparts, with an average noise output of 75 decibels, which falls below the threshold for hearing loss. This illustrates that electric mowers are relatively quiet. However, it should be acknowledged that they are still capable of producing considerable noise, and it is essential to remain vigilant of one’s surroundings while operating the machine. To ensure safety and comfort, using ear protection devices such as earplugs or earmuffs may be considered while operating a lawn mower.

Decibel Level

Electric Lawnmowers: A Quieter Alternative to Gas-Powered Mowers

Electric lawnmowers are designed to be less intrusive than their gas-powered counterparts, emitting an average of 75 decibels below the threshold where hearing loss can occur. Despite this, it’s still essential to be cautious when operating an electric lawnmower, as some factors can contribute to an increase in sound output.

Factors Impacting the Sound Output of Electric Lawnmowers

While electric lawnmowers are known to produce less noise, they can still be affected by various factors that increase their sound output. Issues such as loose parts, dull blades, or impact with complex objects can result in the emission of up to 100 decibels, which can threaten hearing health.

Hearing Conservation with Electric Lawnmowers

Despite the lower decibel levels, taking the necessary precautions is still recommended when using an electric lawnmower. This can include wearing appropriate hearing protection or taking steps to reduce the impact of the blades on hard objects. This way, you can enjoy the quietness of electric lawnmowers while protecting your hearing.

Medical Perspective on Electric Lawnmower Sound Output

From a medical standpoint, the typical sound output of an electric lawnmower, around 75 decibels, does not threaten hearing health. As such, users can comfortably operate electric lawnmowers without requiring additional hearing protection in most cases.

Source of the Noise

Checking the Blade Bolt Tightness: Tilt the mower, grab a wrench, and inspect the bolt holding the blade. If loose, secure the blade with a piece of wood and tighten the bolt clockwise. If the blade assembly is secure and the bolt is tight but you still hear noise from the mower deck, it may indicate an unbalanced or damaged blade. Use a blade balancer to fix the imbalance, or replace the blade if severely bent or damaged.

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Lawn Mower Muffler: Regularly check the muffler gaskets and internal baffles to ensure they are functioning and in place. Heat, corrosion, and cracking can cause muffler noise and damage to the mower.

Mower Noise Causes: Engine noise and spinning blades are the main causes of mower noise. Listen to an electric mower to hear the blade cutting air and grass. Loose muffler heat shields and internal baffles can also contribute to mower noise. Test by tapping the muffler with a screwdriver handle and listen for rattling.

A Lot of Noise

Lawnmowers can generate significant noise, mainly due to the engine and blade assembly. Engines ignite liquid fuel to power the mechanical components, which creates a lot of noise, especially in bigger engines. Loose blade assembly can also cause loud rattling during startup and operation. Mufflers installed on most lawn mower engines are absorptive mufflers, which minimize gas flow restriction for power but generate a lot of noise. Blades, crankshafts, valves, and fans can also contribute to the loudness of the engine. Regular maintenance, such as checking and adjusting valve lash, using high-quality oil, and keeping the engine fan well-maintained, is crucial to reduce the noise. Other parts, such as deck linkages, levers, body panels, and seat and hood rubber stops, can also cause noise and benefit from regular greasing and spraying. To reduce blade noise, coating the underside of the deck with a truck bed liner can be effective.

Mower Deck

Tame the Noise with Sound Deadening Mats! Are you tired of hearing pebbles hit the inside of your mower deck and causing unwanted noise? Let’s take a proactive approach by using automotive sound-deadening mats. These mats absorb vibrations and reduce noise, just like they do for washing machines. Simply clean the area of the mower deck where you want to apply the butyl mat, cut the material into manageable strips, and line the inside of the deck. You can also attach the material to the motor case to further muffle sounds.

Prevent Build-Up with WD-40: After cleaning the debris, give your mower deck a little love by applying some WD-40. This will prevent future debris from sticking to your deck. But be careful; too much lubricant can lead to dripping and harm your lawn’s grass.

Lubricate for a Smooth and Quiet Ride: To keep your mower running smoothly and quietly, lubricate the spindle bearings and wheel axles with a product like WD-40 or grease. We recommend using AtomLube Ultra Heavy Duty grease for the best results. A deeper issue may require professional attention if your mower is still loud after lubricating.

Sharp Blades for a Healthy Lawn: Dull blades can put extra strain on your mower and cause it to work harder and be louder. They can also damage your lawn by tearing the grass instead of cutting it cleanly. Keep your lawn healthy by regularly sharpening or replacing your blade. And don’t forget to maintain your mower deck to avoid rust and other problems – this will help extend the lifespan of your mower. Regular cleaning and sharpening will keep your mower’s blade in tip-top shape!

Lawn Mower Producing

Lawnmowers can produce quite a racket, but have you ever stopped considering why? The decibel level (dB) is what measures the noise, and there are two main culprits behind the noise: engine size and RPM. Simply put, the bigger the engine, the bigger the blade needs to be to keep up. So, next time you hear the buzz of a lawnmower, you’ll know what’s behind the sound.

Disconnecting the Spark Plug

Maintaining the engine is essential to keep your gas lawnmower running smoothly. This includes cleaning the engine to keep it cool, replacing or washing the air filter, and checking the spark plug every few months. If it’s time for a new spark plug, it usually lasts about four to five years. Don’t forget to change the oil at least once a year, and for a helpful visual guide, check out this video.

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Electric and battery-powered mowers are great for those who prefer a more low-maintenance option. However, even these mowers require some routine checks.

If you notice unusual sounds coming from your mower, such as rattling or squeaking, it’s time to tighten some nuts and bolts. To find the noise source, gently wiggle each part and check for any loose connections. If you find a part making noise, lubricate it if it’s squeaking or tighten it if it’s moving. Always be cautious around sharp blades, disconnect the spark plug for gas mowers, and ensure the machine is unplugged and cool to the touch before making any adjustments.

Hearing Protection

When it comes to mowing your lawn, protecting your ears should be a top priority. Fortunately, there are several options to choose from to ensure your hearing stays safe. Lightweight and comfortable earplugs are a popular choice for their ease of use during the mowing process. Another option to consider is incorporating headphones or earbuds with built-in hearing protection. This can not only keep your hearing secure but also enhance your mowing experience by allowing you to enjoy your favorite tunes while you work.

Engine Noise

Lawnmowers can be quite noisy, and it all starts with their small engines that generate a lot of noise due to the internal combustion process. To make things even noisier, most lawnmowers don’t have a muffler that can effectively reduce engine noise. Furthermore, the fast-spinning blades also add to the decibels, and if you have any loose components, that compounds the issue.

But wait, it’s not all doom and gloom! There’s a simple solution. A muffler is designed to keep the engine noise at bay, but if it’s damaged or not properly sealed with the engine, you’ll hear all the engine noise loud and clear. If you spot holes or cracks on your muffler or don’t seem to fit properly with the engine outlet, it’s time for a replacement. Luckily, lawnmower mufflers are easy to remove and replace, and you can buy a brand new one for a budget-friendly price between $20 to $40. With a new muffler, you’ll enjoy a much quieter mowing experience!

Loose Parts

If your electric lawnmower makes a racket, it’s likely due to some loose parts. Over time, the blades, motor, deck, and other components can loosen and create a rattling sound when the mower is in use. This can happen from vibrations produced by the motor, regular wear and tear from use, or hitting complex objects like stones or roots.

But don’t worry, it’s easy to fix! First, listen to where the noise is coming from. If it’s under the deck, it’s probably a loose blade. Then, check all the bolts and nuts to see if they’re loose. Tighten them with a wrench if needed. If your mower has been particularly noisy lately, consider using lock washers to secure the bolts and nuts. If the part is too old or damaged, you may need to replace it. Remember, you can’t tighten worn-out parts like bolts due to weak threads. Get your mower running smoothly and quietly again in no time!

Cut Grass

Listen up, lawn enthusiasts! Have you ever thought about the source of your lawnmower’s distinct roar? It all comes down to the might of the motor. The more powerful the motor, the more swiftly it can spin the blades and easily tackle even the toughest lawns. And if the motor is smooth and quiet, the high speed of the spinning blades still creates a satisfying buzz that signals a job well done. So, the next time you hear the sound of your lawnmower, remember – it’s the sound of efficiency and power in action!

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Replace the Muffler

Bring on the Quiet – Upgrade Your Mower’s Muffler!

Discover the secret to a quieter lawnmowing experience – upgrade your mower’s muffler! Tucked away on the side of your engine, you’ll find a small muffler trying its best to reduce the noise. But let’s face it, that tiny muffler can only do so much. Don’t worry; you’re not stuck with a loud mower forever. Most mowers don’t have a more oversized muffler that can genuinely diffuse the sound from the engine, but you can easily upgrade to one. Say goodbye to loud mowing and hello to a peaceful yard. Remember, a more effective muffler may come at an additional cost, but the peace is worth every penny!

Push Mower

A lawn mower can make a loud sound when it runs. A push mower usually makes a very loud noise when it turns. The main reason why it is loud is that there are blades inside it that are spinning. Riding mowers are quieter because they have fewer blades than push mowers. When you have a lawn mower that is too quiet, it may be difficult for you to hear the warning sounds that you need to listen to. A lawn mower will make a louder sound when it is working harder. You should be careful when you are using your lawn mower.

Reduced Engine Noises

You might not want to buy a noisy mower. So you can always try to reduce the noise level of your lawnmower by modifying its engine design. A quiet lawnmower isn’t that easy to find. However, if you want to buy a good quality, low-noise lawnmower, you might consider buying one made by Briggs & Stratton.

I’ll keep it brief. Consumer Reports tests lawnmowers and tractors in Florida during winter to give you the best recommendations. Watch the video to learn more.

Can the noise from lawnmowers cause hearing damage?

Yes, the noise produced by lawnmowers can cause hearing damage if exposed to it for prolonged periods of time. The noise levels generated by lawnmowers are high enough to cause permanent hearing loss.

Why do dogs hate the sound of lawnmowers?

Dogs have more sensitive hearing than humans, and the noise produced by lawnmowers can be distressing to them. The loud and unfamiliar sound of the lawnmower can be perceived as a threat or danger to dogs, triggering their natural fight-or-flight response. Moreover, the sound can be painful to their sensitive ears, which can lead to anxiety and stress. Additionally, the vibrations produced by the mower can be uncomfortable for dogs, causing them to feel uneasy or even frightened. Therefore, it’s important to provide a safe and quiet place for your dog during lawn mowing activities to avoid unnecessary stress and anxiety.

Do all types of lawnmowers produce the same amount of noise?

No, not all lawnmowers produce the same amount of noise. Gas-powered lawnmowers are typically louder than electric or battery-powered lawnmowers. Riding lawnmowers can also produce more noise due to their size and engine power.

Is there any legislation regarding lawnmower noise?

Yes, many areas have laws and regulations regarding the noise levels produced by outdoor equipment, including lawnmowers. These regulations may vary, so it is essential to check with your local government to ensure compliance with local noise ordinances.


No matter the type, Lawnmowers will always produce some noise due to the moving parts. However, the engine is the biggest culprit. But don’t despair! You can take control of the situation by implementing soundproofing solutions or grabbing a pair of earplugs. And don’t forget the ultimate neighborly gesture: tell them that you’ll be mowing your lawn ahead of time. A simple heads-up goes a long way in keeping the peace.

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