Lawn mower sounds loud. How Many Decibels Is A Lawn Mower

Lawn Mower Makes Loud Clicking Sound

If you’re like most people, the sound of a lawn mower brings to mind memories of summertime childhoods spent playing in the backyard.

But if you’re unlucky enough to own one of those old-fashioned mowers that makes a loud clicking sound, you know it can be pretty annoying.

In this blog post, we’ll take a look at the reasons why lawn mower makes loud clicking sound and how to fix it. Read on!

  • Lawn Mower Makes Loud Clicking Sound- Causes
  • 1. Low Battery Voltage
  • 2. Clutch Problems
  • 3. Blades Hitting a Foreign Object
  • 4. Faulty Solenoid
  • 5. Faulty Starter
  • 6. Faulty Flywheel
  • Lawn Mower Making Rattling Noise
  • 1. Faulty Bearings
  • 2. Faulty Exhaust
  • 3. Loose Head Bolts
  • 4. Dirty Air Filter
  • FAQs- Lawn Mower Makes Loud Clicking Sound
  • What Does a Clicking Solenoid Mean?
  • Why Does My Lawn Mower Sound Like a Helicopter?
  • How Do I Stop a Lawn Mower from Clicking?
  • Author

Lawn Mower Makes Loud Clicking Sound- Causes

Low Battery Voltage

One possible cause of the loud clicking noise on your lawn mower could be low battery voltage. When the battery is weak, it might not provide enough power to the motor, which can cause it to click loudly. Try charging the battery or replacing it with a new one to see if that fixes the problem.

Clutch Problems

Another common cause of lawn mower clicking noise is a loose clutch. The clutch works with the transmission to engage and disengage the blades while you mow, and it can become loose over time.

You might think that a clutch problem would result in your lawn mower not running, but that’s not always the case: if it becomes too loose, the clutch will slip and make a loud clicking noise. The good news is that the clutch is relatively easy to replace.

Blades Hitting a Foreign Object

It’s also possible for blades of grass, sticks, rocks, or other objects to get caught between the blades while you mow, eventually causing them to stop moving properly. The blades might make that loud clicking noise while you mow if this happens.

If the blades are hitting something, they’ll usually slow down or stop completely after a while. The best thing to do is stop the mower and check underneath it for anything that might be in the way.

Once you remove whatever is stuck, the blades should normally work again.

Faulty Solenoid

The solenoid is a part that can fail and cause the lawn mower to make a loud clicking noise. The solenoid essentially acts as a switch, allowing current to flow through it and to the starter motor.

If your solenoid is damaged or defective in any way, it could be making a loud clicking noise when the lawn mower is running. Try checking it for loose wiring or debris that might have gotten stuck in it, and replace it with a new one if necessary.

Faulty Starter

If the starter is faulty, it might not provide enough power to the engine, which can cause the lawn mower to click loudly. Try replacing the starter with a new one to see if that fixes the problem.

Faulty Flywheel

The flywheel is another part that can make the mower click loudly. It works with the starter to turn over the engine, and if it fails or becomes damaged, you could hear a loud clicking noise when the mower is running. Try checking for debris that might have gotten stuck in it, and replace the flywheel if necessary.

Lawn Mower Making Rattling Noise

If your lawn mower is making a rattling noise, several possible causes are. Here is a look at some of the most common ones:

Faulty Bearings

The bearings in your lawn mower can also make a rattling noise, which will result in the lawn mower not running. If the bearings get too hot, they could warp and start rattling while the mower runs.

This is a common issue in mowers left out in the rain, but it can also occur under normal operating conditions. If this happens to you, replace the bearings.

Faulty Exhaust

Another common problem that can cause a lawn mower to rattle while running is a loose or damaged exhaust.

The exhaust pipe attaches to the engine, and vents used combustion gases out of the mower. If it becomes loose or is damaged in some way, you’ll hear a rattling noise when you run the mower.

Loose Head Bolts

The head bolts of your engine are another potential cause of a rattling noise while your lawn mower is running. The head bolts hold the engine’s cylinder head in place, so if they become loose, you’ll hear a clattering noise coming from the engine.

This is an issue that’s common in mowers that have been through accidents or have had their engines rebuilt, but it can also occur in perfectly normal situations. If the head bolts become loose, you’ll need to tighten them before your lawn mower runs properly.

Dirty Air Filter

A dirty air filter can also cause a lawn mower to make a rattling noise while running. This can occur in two ways.

  • First, the engine will be hard to run if the filter becomes dirty enough to restrict airflow
  • Second, if the filter is worn out and no longer properly filters out particles, you’ll hear a rattling noise coming from the engine compartment

If your lawn mower is making a rattling noise, the best thing that you can do is clean or replace the air filter. If the problem persists after replacing the filter, it might be time to get your engine’s head bolts checked or replace your exhaust.

FAQs- Lawn Mower Makes Loud Clicking Sound

What Does a Clicking Solenoid Mean?

A clicking solenoid means one of two things. Either the starter has become faulty, or there is something stuck in between the blades of the mower.

If the sound is made only when the mower is turned on, your starter is most likely faulty. A new starter can be easily installed by yourself or a repair shop.

Why Does My Lawn Mower Sound Like a Helicopter?

If your lawnmower sounds like a helicopter when you turn it on, the blades are likely hitting something and need to be adjusted.

Loosen the bolts on top of the mower deck with a wrench and blade screwdriver2. Carefully lift up the mower housing and turn the blades until they are even3. Tighten the bolts securely and replace the housing

How Do I Stop a Lawn Mower from Clicking?

If your mower is making an intermittent clicking noise, it could be due to debris stuck in the blade or starter.

Turn off the mower and remove the spark plug wire2. Rotate the blades by hand and check for any objects that may be stuck in between the blades3. If you find something, remove it and turn on the mower to see if the noise has stopped

If your lawn mower is making a rattling noise, it will need to be fixed before you can use it again.

In most cases, this simply means replacing the air filter, but if this does not resolve the noise issue, you may need to have your engine’s head bolts checked or replace your exhaust.


Hi, I’m Ricky. I’ve been involved in lawn care and landscaping from when I was 15. To be honest, I didn’t like the idea of pushing mowers, collecting grass clippings, and maintaining flowerbeds at the time. But having seem the passion my parents had for gardening and outdoors and the effort they put in maintaining the health and beauty of our landscape, I couldn’t help but not only admire their hard work but also I became a part of it. As someone who loves to spend time with nature’s best, I find myself learning a lot more about gardening and outdoors on a daily basis. Not to mention I love to share the knowledge I’ve gathered over the years with my readers at We Mow Dallas. To be clear, I don’t have a Master’s degree in gardening or anything like that. Everything I’ve learned about gardening, landscaping, and lawn care spring from passion and engagement with my parents. And with a ton of free information out there, plus the ability to run tests and determine what works best for lawn care and landscaping, every day is an opportunity to learn and implement something new. My goal with We Mow Dallas is to teach you exactly how to maintain your lawn and landscape. And since I walk the talk in reality, you shouldn’t hesitate to join me in this wonderful world of landscaping and lawn care. View all posts

How Many Decibels Is A Lawn Mower?

A decibel (dB) is a unit used to measure the intensity of a sound. The decibel scale is logarithmic, which means that each increase of 10 dB represents a tenfold increase in loudness.

Some quick facts about the decibel scale:

  • The human ear can detect sounds ranging from 0 dB to 140 dB.
  • Sounds above 85 dB can cause permanent damage to hearing.
  • Sounds at or below 70 dB are generally considered safe.
  • Between 85 dB and 120 dB can cause temporary discomfort.
  • Above 120 dB, sounds can cause pain and physical damage.
  • Decibels are often abbreviated as dBA when measuring environmental noise levels. This “A” weighting reflects the way the human ear responds to different frequencies of sound.

How Loud Is A GAS Lawn Mower And How Does It Compare To Other Sounds?

Check out the infographic below showing you how loud a lawn mower is:

On average, a used lawn mower produces around 92 decibels. All mowers are different but that is the average for a normal residential gas powered lawn mower.

lawn, mower, sounds, loud, many

There are plenty of other sounds that are much louder than a gas lawn mower. For instance,

  • a jet engine taking off produces around 150 decibels (from 100 feet away)
  • a gunshot is also 150 decibels but that is at arms length
  • a revving motorcycle is 115 dB
  • a lawn mower gas powered is 90 – 95 dB
  • a battery powered electric lawn mower is 75 – 80 dB

What Are The Health Risks Associated With Exposure To Loud Noises In A Lawn Mower?

Lawn mower safety is no joke. We understand lawn mowers are a necessary part of keeping a neat and tidy lawn. But while they may make the job easier, they also come with some health risks.

One of the most common dangers is exposure to loud noises. Lawn mowers producing noise levels above 85 decibels can cause permanent hearing loss. And since lawn mowers typically produce noise levels between 90 and 95 decibels, it’s important to take precautions when using one.

Tip: Wear earplugs or earmuffs to protect your ears, and take breaks often to avoid overexposure.

Additionally, be sure to keep children well away from the lawn mower as well as pets while it’s in use. By taking these simple steps, you can help reduce your risk of developing noise-induced hearing loss.

Are There Any Steps You Can Take To Make Your Lawn Mower Quieter?

Yes there are a few steps you can take to make your lawn mower quieter.

Make Sure The Blades Are Sharp

First, make sure that the blades are sharp on your lawn mower. Dull blades will cause the engine to work harder, resulting in increased noise.

Make Sure All Of The Bolts Screws Are Tight

Second, check that all of the bolts and screws are tight. Loose components can also lead to increased noise levels.

Replace Your Muffler With A Quieter Model

Finally, consider replacing your muffler with a quieter model with higher noise reduction rating.

Switch To A Battery Powered Mower

Battery powered mowers are much quieter than gas ones. And the new models out by Greenworks and Ego and Ryobi all have batteries to allow up to an hour of mowing time. It’s not like the old days of battery mowers where they last 15 mins before needing a new battery.

So yeah, check one of those out if you have a small lawn and really value the benefits of an electric mower: less noise, less maintenance, no fumes.

By taking these steps, you can enjoy a peaceful Saturday morning while still getting your lawn mowed.

1) How many decibels is a lawn mower?

Lawn mowers typically produce noise levels between 90 and 95 decibels.

2) What are the health risks associated with exposure to loud noises in a lawn mower?

Prolonged exposure to noise levels above 85 decibels can cause permanent hearing loss.

3) How can you protect yourself from noise-related hearing loss in a lawn mower?

Wear earplugs or earmuffs to protect your ears, and take breaks often to avoid overexposure.

4) Are there any steps you can take to make your lawn mower quieter?

Make sure that the blades are sharp and that all of the bolts and screws are tight. You can also consider replacing your muffler with a quieter model.


  • You know those stripes on baseball fields? Learn how to stripe your own lawn in this how to guide.
  • A fun little experiment we did called The Constant Groundskeeper takes a look how big of a lawn a single human could keep perfectly mowed if mowing 24 hours per day.
  • Did you know mowing the lawn can be good for your health? Yes, it can. Here’s how many calories it can burn in addition to the fresh and sunshine exposure.

About your guide: Jamey Kramar is a certified Lawn Care Manager (NALP) and a Mechanical Engineer by trade. He has been writing about outdoor power equipment for 11 years and has been quoted in NYTimes, Popular Mechanics, HowStuffWorks, iFixit,, and more. He spends his spare time disassembling things and also building an off-grid cabin at his 200-acre property.

Is Your Lawn Mower Rattling or Sound Weird? Check The Fixes Here

Rattling is one of the most common sounds a lawnmower makes. If the lawnmower is rattling, it may have a part that could detach at any moment. Thus, you likely want to know why your lawnmower is making noise and how to fix it.

The most common causes of Lawn Mower Rattling are loose bolts and nuts, damaged or worn-out blades, a broken muffler, old engine oil, a clogged air filter, and debris lodged in the mower deck.

What Causes Lawnmower Rattling?

Causes of Lawnmower Rattling Solutions
Loosen Bolts and Nuts Due to vibration Tighten the bolts with a socket or wrench. Use lock washers or thread-locking compounds. Replace the damaged or worn-out bolts and nuts.
Damaged Blade Bent blade Unbalanced blade Loose blade assembly Replace the bent blade. Use a balancer to fix the unbalanced blade. Tighten the bolt that holds the blade.
Damaged Muffler Small holes or cracks on the muffler Broken muffler Use patching materials or muffler repairing tape. Replace the muffler.
Contaminated or Damaged Engine Oil Replace with the fresh and suitable oil.
Clogged Air Filter Clean the filter with a brush, scraping tool, or compressed air. Replace the worn-out air filter.
Debris in Mower Deck Avoid rough terrain. Adjust mower deck height. Clean the deck after using each time.

Lawn Mower Rattling: 6 Things to Check

Some major causes of lawnmower rattling and their respective solutions are given below.

Loosen Bolts and Nuts

Loosen bolts and nuts are the most likely reason why the lawnmower is rattling.

Over time, the vibrations produced by the mower could loosen the bolts, nuts, and screws that hold the mower together. This causes the mower’s parts to bang against each other.

Periodically, especially after extended use, inspect various components including the blade deck and engine for any visible sign of looseness for movement. If you don’t know which bolts or screws are loose, go over all of them and tighten the loose ones.

lawn, mower, sounds, loud, many

Use a wrench or socket to tighten those bolts and nuts. Ensure the correct torque, specified by the user manual to prevent under-tightening or over-tightening.

Damaged or worn bolts, nuts, and screws must be replaced. You may also use lock washers or thread-locking compounds to keep bolts and nuts from coming loose.

Damaged Blade

A lawnmower blade may be bent, become unbalanced, or the blade assembly may become loose, causing the lawnmower to rattle.

Bent Blade

Lawnmower blade could be bent or chipped upon contact with hard objects. A bent blade in contact with the skid plate causes rattling.

The blade is installed in the gap between the cutting disc and skid plate. When the disc rotates, an unsecured the skid plate due to a damaged skid plate cover applies vertical pressure on the blade. This causes the blade to be bent.

The worn-out or bent blades must be replaced with new ones. The skid plate cover should also be checked for replacement.

Unbalanced Blade

Lawnmower may rattle because of one side of the blade may be lighter than the other.

Use a lawnmower blade balancer to fix the unbalanced blade.

Loose Blade Assembly

Loose Blade Assembly causes the blade to vibrate and move in an uneven manner, thus making contact with other parts of the lawnmower.

The blade adapter that connects the blade to the engine’s output shaft may also become loose or damaged, causing vibration and rattling.

To fix a loose blade assembly, take the following steps.

Step-1: Disconnect the spark plug

Prevent the accidental start-up of the lawnmower by disconnecting it from the power source.

Step-2: Tighten the bolt

Tighten the bolt that holds the blade. When tightening, you can use a piece of wood to prevent the blade from turning.

Damaged Muffler

A muffler is used to reduce the sound of the engine exhaust by a lot. A broken muffler might have holes or cracks that can be seen with the naked eye, or it might not fit right on the engine outlet.

If the muffler is broken, it may not work well with the engine. The gap lets engine noise and vibrations escape, making a rattling sound.

Again, a broken muffler can mess up the flow of air and the pressure inside the engine. This makes the engine shake more and make a rattling sound.

Depending upon the extent of the damage, you may decide whether to replace or repair the muffler. over, it’s recommended to replace the damaged muffler with a new one since they are not too expensive.

It can be done in a few easy steps-

Step-1: Cool down the engine

Make sure the engine is not hot. It is wise to wait for some hours before replacing the muffler. It’s recommended to use a pair of gloves for protection.

Step-2: Locate the muffler

Mostly, mufflers are located on the side or rear of the engine. Typically, they are attached to the end of an exhaust pipe. Unscrew the exhaust pipe to remove the muffler entirely. You may need a pipe wrench to unstick the rusted muffler.

Step-3: Repair or replace the muffler

If the muffler has minor cracks or tiny holes, it can be repaired using patching materials or muffler repairing tape like FiberFix.

On the other hand, severely damaged or rusted mufflers must be replaced with a new one. Install the muffler by putting the threaded end into the engine’s exhaust outlet and spinning it clockwise to tighten.

Contaminated or Damaged Engine Oil

Engine oil works as a lubricant between moving parts of the lawnmower engine and prevents the parts to rub against each other.

Over time, oil becomes degraded or contaminated with debris, dirt, or water and can no longer perform the intended work.

The engine requires to change the oil every 30 to 40 hours of use or twice a year. Use the following troubleshooting steps to change the oil-

Step-1: Start the lawnmower

It is important to warm the oil for warm oil flows easily.

Step-2: Drain the old oil

Remove the drain plug which is located near the bottom of the engine and drain out the old oil completely in a container.

Step-3: Add fresh oil

Fill the oil tube at the optimum level with the recommended type of oil.

How to Fix a Noisy Mower Deck. John Deere Lawn Tractor. Spindles, Pulleys, Blades, and Belt

Clogged Air Filter

The air filter works as a barrier to prevent debris, dirt, and dust from entering the engine and allows only clean air to enter.

Over time, the filter fills with those dust or debris and becomes clogged. This blocks the airflow to the engine and causes rattling.

You can clean or replace the clogged air filter by following the easy steps given below.

Step-1: Turn off the mower

Remove the spark plug wire to ensure safety.

Step-2: Locate the air filter

Mostly it is rectangular in shape and is located near the carburetor.

Step-3: Clean or replace the filter

Remove the air filter cover and tap on a hard surface to displace all the debris and clouds of dust. If the filter still looks dirty, use compressed air to blow it clean or brush the filter. The damaged filter must be replaced.

Step-4: Reinstall the air filter

Cover the filter and put it back in place.

How Quiet Is a 100% Electric Lawn Mower? Gas Vs. Electric!

Debris in the Mower Deck

Grass, clippings, stones, dirt, twigs, and other debris may build up underneath the mower deck gradually. Mowing on uneven or rough terrain causes more debris to trap in the deck. This debris stuck between the blade and the deck or vibrates against the deck, causing the lawnmower to rattle.

You should adjust the mower deck height and avoid mowing on rough terrain. You can follow the simple steps given below to clean the mower deck.

Step-1: Clean the mower deck

Unplug the wire and clean the deck with a stick, brush, scraping tool, or compressed air to blow out the debris. Use a power washer only if the user manual allows the use of water.

Step-2: Use WD-40 to the deck

After you have cleaned up the debris properly, apply some WD-40 which keeps the debris building up again.

Maintaining a beautiful lawn can be a daunting task, especially if you lack the appropriate know-how and tools to handle the challenges that may crop up. Fortunately, LawnAsk is here to offer you an all-encompassing resource that covers everything you need to know about lawn care.

Recent Posts

Robotic Mower Too Loud? How to Fix It in Just 5 Minutes

When you bought a new robotic mower, you must have been thrilled to see how it mows your lawn so well while remaining so quiet. But after a while, a robotic mower can start getting louder, which can be for a variety of reasons. The good news is that it’s often not too difficult to get the robot to quiet down again. That is what this article is all about. How do you make your robotic mower quiet again? If your robotic mower has suddenly become louder, in most cases it’s due to a problem with the mowing unit, such as a mistake made when changing the blades, or even excessive dirt buildup. In the case of robotic mowers with blade discs, you should especially need to ensure the two blades have not accidentally been screwed together at the same hole. There are many other possible causes, but these are the most common. In this article we will work our way from the more common to the most specific causes. There are also some problems which are specific to certain models. I try to keep this article up to date, so if you have a problem that’s not listed here, or suggestions for solutions yourself, feel free to write them in the Комментарии и мнения владельцев below.

How Do You Make Your Robotic Mower Quieter?

To make the robotic mower quieter, there are various options available to you. For example, you can install what’s called a “sliding plate.” This will quiet the mower regardless of what the problem is.

You can also install sharper blades to reduce mowing noise. There are special titanium blades for robotic mowers that are more durable than the standard blades and don’t get dull as quickly.

When the mower blades become too dull, the grass is plucked from the ground more than it is cut, causing the mowing noise to become louder. So it is all the more important that the blades are always sharp. Not only should you use sharper and more durable blades to keep noise down, changing the blades often will help, too. In this article I have gone into more detail about how often you should change the blades.

Last but not least, regular cleaning of the robotic mower is also important. You should clean your mower roughly every two weeks, which usually takes less than 10 minutes. This helps keep the volume down, because it prevents too much dirt from building up on the blades and frame and making noise.

In addition, various problems can cause your mowing robot to be noisier than normal, such as an imbalance in the blade discs or wear of the ball bearing in the mowing motor. I will discuss these problems further below.

In brief: These are the approaches you can take to decrease the volume of your mower:

  • Installation of a sliding plate (not available for all models)
  • Use of sharper and more durable blades (titanium blades)
  • Regular replacement of the blades
  • Regular cleaning of the robotic mower
  • Fixing technical issues that increase mowing noise

In the following sections I will go into more detail about each of these options.

Approaches to Make Your Robotic Mower Quieter

A Sliding Plate Reduces the Noise of the Mowing Unit

Sliding plates reduce the noise your robotic mower makes when mowing. A sliding plate is a flat plate that is installed under the actual mowing unit, which the robot will slide on to a certain extent when mowing.

The plate not only makes the mower quieter, but also has a number of other useful side effects. For example, the sliding plate prevents the mower from getting dirty as quickly because it prevents grass clippings or seed pods from getting stuck in the mower, the outer shell, or under the blades.

So with a sliding plate, you don’t have to clean your mower as often, and it will run better overall because it is simply less dirty. Being less dirty, in turn makes the mower quieter. You can also expect a slight improvement in operating times, because the mower does not have to “struggle” as much against caked-on dirt and clippings when mowing.

Unfortunately, sliding plates are not available for all mowing robots, but in any case they are available for most models of Husqvarna. Yet, they are not being sold in the US, at least I couldn’t find them anywhere. Here is a seller from Germany that sells them on eBay, just to give you an idea of what this is. It seems though they only ship within Europe. If you see these things being sold anywhere in the US, I’d love to here from you where you got them.

Sharper and Durable Blades Reduce Mowing Noise

The standard blades that come with mowing robots are not bad, but you can certainly replace them with something better. On the internet you can find more and more “high end” blades with special coatings, such as titanium carbide.

These blades are even sharper than normal blades, which leads to a reduction of the mowing noise. This is because the sharper blade can cut through grass with less resistance (think friction) from the grass, which reduces noise.

In addition, these blades have a greater durability, so they do not become dull as quickly. Aside from constant mowing, various environmental conditions can make blades dull. The right blades, however, have a certain resistance to acids and bases and are particularly resistant to corrosion.

These blades here on Amazon are an example of such blades for robotic mowers with blade discs (note that there are also mowing robots with star blades). They have a special titanium coating that makes them last longer.

Regular Replacement of the Blades Reduces the Mowing Noise

No matter which blades you use, you should replace them regularly. With particularly durable blades, such as the C-blades just mentioned, this has to be done less frequently than with “cheap” blades. Exactly how often you need to replace the blades is hard to say, as it depends on many factors, such as the type of grass in your lawn and its growth rate.

In this article I’ve written, you can read more about how often you should replace the blades. Sharp blades are essential for quiet mowing, as the lawn is cut properly and not plucked.

And not only that, it is of course better for your lawn. If you pay attention to the sharpness of the blades, you will get a much better cut and a healthier lawn. Pretty much no blades will last longer than 3 months (for models with blade discs), and many will have to be replaced even more often.

Regular Cleaning Ensures Less Noise

Regular cleaning of the robotic mower ensures lower noise levels in the short and long term. Dirt and grass residues, as well as other objects that can get into the mowing unit or in the framework, cause the robotic mower to make more noise while mowing.

If the mower unit is so clogged with dirt and clippings that it drags all of the lawn cuttings along when mowing, this will of course make it louder. Lawn seeds that get wedged in the mower are also problematic. In addition, stuck grass can also lead to slight imbalances in the mower deck, which then will become louder as a result.

In the long term, the robotic mower also wears out faster if it is not cleaned regularly. Signs of aging, which in turn can cause noise problems- such as a corroded bearing in the mower motor- will then set in more quickly.

Therefore you should clean your robotic mower regularly. It is sufficient to do a simple cleaning every one or two weeks. This does not take longer than 10 minutes. Once a year you can also do an intensive, complete cleaning.

Problems That Make the Robotic Mower Louder

If you keep all these things in mind and your robotic mower is still too loud, there may be other reasons why this is happening. Here I will go deeper into some common problems, which I will be updating as time goes on.

Imbalance Due to Accidentally Attaching Two Blades Together

Mowing robots with blade discs utilize three small blades that are individually screwed to the blade disc. These are then pressed outwards by the centrifugal force during mowing.

If two blades are accidentally screwed onto a single blade hole, the weight of the blade disc is no longer evenly distributed. The imbalance then produces a clearly audible, loud noise when mowing.

You might think it’s pretty hard to “accidentally” screw two blades in on top of each other. But, like new paper bills fresh from the ATM, the blades can sometimes stick together when first removed from the packaging, so that you end up screwing two blades together without noticing it.

If the mower makes a strangely loud noise, you should always check again whether there is really only one blade per blade hole, and correct it if there is an issue.

Loose Blades Produce a Rattling Noise

This point also applies to robotic mowers with a blade disc. Although the idea with the blade disc is that the blades can move freely and swing outwards during mowing, this does not mean that the screws that hold the blades in place do not have to be tightened all the way.

This is a common mistake that happens to new robotic mower owners when changing blades. You can go ahead and tighten the screws completely and the blades should still be able to swing freely.

If you do not tighten the screws enough, the blades will sit loosely. This can also lead to a rattling noise when mowing. In the worst case, the head of the screw can even be cut off, which will cause the blade to come loose and cause an imbalance, leading to additional unpleasant noises.

Noise Generated by the Sliding Plate

Above I mentioned that a sliding plate reduces the noise of the mower deck, but under certain circumstances this can also lead to a certain amount of noise.

If your robotic mower has a sliding plate, you may have noticed that it sometimes hums a little when mowing. This is especially true when the grass is relatively tall. In this case the sliding plate does not turn as fast as the mower deck, because there is too much grass in the way, slowing it down.

There are three holes in the sliding plate. If the sliding plate rotates slower than the mower deck, turbulence occurs at the holes as the blades “rush past”, creating a noise that can be heard as a humming sound.

The holes can easily be closed with tape. The best way to do this is to use a strong and robust fabric tape such as duct tape or plumber’s tape.

I found a video that shows how to do this. It’s in German but you’ll get it from just watching it (it’s super simple).

After Some Time the Ball Bearing of the Motor Can Wear out

Sooner or later the ball bearing underneath the motor of your robotic mower can wear out. How long this will take depends very much on the care and use of the mowing robot. For some people this never happens during their lifetime.

However, if your mowing robot makes a very rough and loud engine noise while mowing, it could be because the ball bearing underneath the mowing motor is already heavily worn or corroded.

If you are not sure which engine in the robotic mower is causing the noise, pay attention to how the noise changes when the robotic mower switches off its mowing unit. It does this, for example, when it returns to the charging station or drives to a remote starting point.

Clattering Noise Due to Loose Blade Disc

On robotic mowers with a blade disc, it is possible that the blade disc is not properly fixed to the mower. This can lead to extra noise, which is usually expressed as a rattling noise. This problem occurs especially with larger robotic mowers.

The solution is, of course, to attach the blade disc correctly.

Again I couldn’t find video in English that shows this and had to fall back to a German one. But again, you simply have to watch what the guy is doing. If something is unclear, just ask me in the Комментарии и мнения владельцев below this post

If you have a different model of robotic mower with a sliding plate, it will probably work similarly. If you don’t think you can do this repair, then you should ask a dealer of your brand.

The Outer Shell Can Begin to Rattle After a While

Some users have also reported that after some time, the shell of their robotic mower began to rattle because it started to come loose. The reason for this was always a wear on the front shocks.

To see if they are worn out, you just have to remove the shell and test the front of the shocks to see how much resistance they give. If they can be pushed in pretty easily, then they are too worn.

This can happen, for example, if your robotic mower runs into obstacles frequently. If you have this problem, you will probably also need to contact your dealer. If you are lucky, you might still have a warranty, otherwise you will probably have to pay for a replacement.

Related Questions

How loud are robotic mowers? The various models of robotic mowers differ greatly in their volume. While the quietest mowing robots only reach 55 dB, which is about the hum of a refrigerator, there are also mowing robots that reach 75 dB, which is a little louder than a vacuum cleaner.

Are robotic mowers allowed to mow at night? There is no general ban on night-time operation for robotic mowers. In theory, you can run your robotic mower at any time you like. However, some municipalities or neighborhoods have noise ordinances in effect past a certain time of night, so make sure you check with your local laws first.