lawn mower makes loud clunking sound when starting

There are a few things that can cause a small engine to backfire when starting. Gasoline is a mixture of volatile hydrocarbons, or fossil fuels. The noise can be loud or soft but it's important to note that the louder the knocking noise when starting your lawn mower is . this may be far fetched and totally not the problem but have you cleaned out the intake on the top of the engine. If the oil is low, it means that the engine is working harder than it should be, and is likely blown. The reason why lawnmowers sound like helicopters is because they create a lot of noise. Check the muffler as best as you can. There are a few ways to tell if the crankshaft is broken. Simply attach a hose with a special coupling, and that will work wonders. Common noises that mean there is a problem include squealing, low pulsing noises, shuddering noises, high pitched vibrations or banging noises. Sounds dumb but had a honda motor do the same. Answer: Yes, it is possible to reduce the noise level of a mower. Parts. 3 of 4 had vibrated out. Low Oil Damaged Blade Broken Blade Adapter Damaged Belt Covers When the blade gets too hot, it can cause the blade to break. (The Short Answer), How to Fix a Lawn Mower Engine That Makes a Knocking Sound. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); This site uses Akismet to reduce spam. You can spray sound deadening bed liner to that painted part of the deck. But the problem is that you may have a question: why are the lawn mowers so loud when starting. Why does my lawnmower sound like a helicopter? Smoking Briggs & Stratton engine [. The spinning blade can freely rotate for this bearing. But Before that, you need to know the basic function of this machine. If your lawn mower is making loud clunking sounds when starting up, here are three possible reasons why: The first thing you should do is check the oil level. Doing this will create a tighter seal. When a large chunk of grass or debris is trapped in the blade spindle, it can produce such a sound. Tune it up, change the oil . The build-up of grass and debris under the deck of the mower and on the blade can produce a loud clunking sound. The dirt blocks the flow of air, and less than the needed amount of air can reach the carburetor. Lubrication and cleaning might resolve the issue quickly. The blade with the belt is not spinning freely and is grinding. If the engine is not getting enough oil, it can cause the pistons to seize and the engine to stop working. Regularly check the oil level, and if needed, add some oil. freely spins around but when I try to start the mower it won't start, it makes a loud clunking sound and the pull rope sometimes only comes out about half way and abruptly stops. Just you need to give the push to operate this machine. During using new oil, the piston of the quieter engine moves smoothly without sound. Check the spark plug gap. Save my name, email, and website in this browser for the next time I comment. I think people who dont like sound can prefer this type of reel machine. Hence, it is better to fix such a problem once its started to restore the mower to its initial efficiency. Improve this answer. If that is the reason, you can try to find the most affected connections and replace the bolts with some slightly thicker ones. Engine Knock, Briggs & Stratton 18 HP - Tractors Forum - GardenWeb. If so that might be another reason for the clunk you hear. If the oil level is low, add more until it reaches full. If your engine still makes a clunking noise when you start it up, try changing the gas. There are a few reasons why your lawnmower might be making this weird noise. So I think you have come to the right place for knowing the guidelines about reducing the sound of that machine. Gasoline also evaporates faster at high altitudes because theres less air pressure there compared to lower altitudes (where there are more molecules). My guess is its in the BBC, bearing going out or blade is loose. Sometimes using a different brand of gasoline can help with any problems related to fuel consumption. Lack of oil for shaft bearings. If youre noticing that your lawnmower isnt cutting the grass as well as it used to, or if the engine is struggling to turn, it might be time to take a closer look and see if its blown. The most common noise you'll hear from lawnmowers is a loud rattling sound resulting from a loose blade assembly. Could it be the compression release system ? Dryer Replacement Parts. This is why I have tried to share the overall noisy issue of that machine. For finding the answer, you have already searched on the internet but you didnt get any reliable idea for reducing that mower sound. We like to help other people maintaining their garden and find cool products to write about. If the engine turns over easily, the crankshaft is likely not the issue. We can categorize them as: AC compressor making a buzzing noise (malfunctioning contactor). The Fora platform includes forum software by XenForo. Worn or otherwise compromised drive belts are a common cause of noises when accelerating. Sometimes, the dirt sticks to the filter so bad that it blocks the small pores present in the filter. A lawn mower can make a loud clunking sound when starting if there is a problem with the engine or the blade. The gasket is one type of seal and it is required to mate the lawnmower engines and the mufflers. Besides, you can also use a reel mower that doesnt have an engine. Besides, when you power the mower (from the cordless battery or not), vibration may be created in it. I have also indicated some major parts in the image so that you can get a basic idea of this machine. Good Luck! You also know that low vibration means low noise. The will back out about 1/16 of a turn and allow the engine to move on the frame and will clunk loudly most times at start up and shut down. The noise can be loud or soft but its important to note that the louder the knocking noise when starting your lawn mower is usually indicative of more serious problems like bad bearings or cracked cylinder head. The main noise source of the electric mower is the deck area where the grass is cut by lawnmower blades. First, check the muffler for damage. The only negative I have is when I put the cutting deck in gear or push the throttle open quickly, there is a knocking noise that sounds like the motor is loose on the frame. When I pull the cord, it sounds like it wants to crank but won't start. When car is being started up, in the very first or second second while the startup process is happening, I can hear a mild to load clunk noise coming from the engine. If you notice that some noise comes from these shaft bearings, you can apply lubricant. Now, you can ask me: Why are these small engines so loud? If your lawn mower is making a loud clunking sound when you start it, theres a good chance that theres something wrong with the flywheel. This popping noise is the sound of the blade breaking. i had an engine that had a similar problem. My lawnmower makes a large clunking sound when starting. Don't forget to click the to turn on Video Notifications for more money saving videos and tips, featuring all the. Be sure to dry everything thoroughly afterward so that it doesnt rust. For doing that you need to follow some important steps. Or it may be that the blades are loose and producing such sound. A lawn mower can make a loud clunking sound when starting when debris has accumulated under the deck. Of course, bad ball joints make a clunking noise. Hang them on a nail and check if the balance is ok. Why is my mower sputtering and backfiring? Whatever the problem is, it is essential to diagnose it first. The engine oil needs to be checked regularly. If the engine doesnt turn over, try jiggling the crankshaft. Without it, the various components would scrape and rub against each other, causing them to overheat and potentially break. Now by hand slowly turn the engine to the 11 O'clock position and then to the 1 O'clock position. The crankshaft is the most central piece of your engine, as it is what spins the blades and the drive belt. Finally check all bolts holding everything together; if theyre loose they could be causing vibrations which would result in noises too loud for most peopleand even some animals tooto bear hearing day after day after day. Share. Another common reason for a loud lawn mower is a loose blade. There are also some more technical causes to point out . However, what happens if you notice a sound that isnt supposed to be there? One is to check the air filter. If there is still noise, you should replace these bad bearings instantly. You will need a strap wrench to dislodge the filter and be sure to place a drip pan or towel underneath when removing it, as some oil will dribble out. Troy-Bilt won't drive straight or steer correctly. Once all the ground is removed, spray some silicon spray of a lubricant (like WD40) on the deck, preventing further soil accumulation under the deck. The muffler of this machine is also a reason for the noise. What you hear and feel the the connecting rod moving on the crankshaft. The drum bearing supports the rear of the dryer drum. There are a few reasons why your lawn mower might be making a popping noise when you start it. Above 85 dB is harmful and may hurt your ear. If you can increase the layer of the mower deck, there will be low vibration in that deck. link to Natural Ways To Keep Mosquitoes From Biting. Unplug the dryer (and shut off the gas valve if you have a gas model). This is how you diagnose and fix it: The clunking sounds can arise due to various factors. How do I know if my lawn mower crankshaft is broken? What causes a small engine to backfire when starting? Oct 16, 2017. Something I found but did not completely eliminate the noise was the pull starter casing had only one screw holding it securely. Always ensure that there is enough good quality oil to lubricate and protect the engine. 2023 LawnMowerForum.com. However, you can try to mow your lawn when the wind is blowing in the opposite direction. Picture source . You can also check the oil level. N.B: Electric mower creates less noise than usual lawn tractors. This to ensure that the engine can not unintentionally start when you are working on or close to the blades. Remove any debris and re-start the mower. Because there are multiple culprits for this noise, well break down each option and its solution so that you can get your mower back up and running in no time. But of course, all the grass cutters produce noise during running time. Does Citronella Actually Help Keep Bugs Away? This may be due to a low quality of damper used in the lawnmower that cannot suppress the noise. Clean the mower after you use it. That is why this machine is not designed for low sound generation. JavaScript is disabled. Privacy Policy | Then disconnect the drive belt from the motor and lift the drum out the front of the machine. Small panels will be easier to fit around awkward shapes. This vibration is created from the joints of different parts (equipment) of the mower. N.B: Jet engines are louder than this type of engine. The most common Troy-Bilt lawn mower problems are: Troy-Bilt won't start. Its a liquid at room temperature, and that means it evaporates quickly. Lawnmowers are mechanical devices that already produce a lot of noise. b. Absorptive Mufflers/Absorptive SilencersIt is a normal muffler that has no advanced engineering design. Low engine oil level is the main cause of engine knocking on mowers. Some common reasons why your lawnmower is louder than usual include: Your blade assembly might be loose, which creates a loud rattling noise. 06 - Frigidaire Dryer Drum Bearing. Terms of Use | If one is loose, tighten it. Whether it be a problem with the cutting deck or oil, lets explore why your lawnmower is making a clanking sound. How do I know if my lawn mower crankshaft is broken? I kinda would like to know what is causing the noise though, so if I could, I could fix it. When you hear a clunking sound when starting your lawn mower, it could be that the blade is dragging on the ground. Another possible reason for the popping noise is that the engine is not getting enough oil. First, you should know why loud mowers make a sound? If this is not the case, remove some metal on the side that is heavier until it is correctly balanced. We will look at the different causes and fixes when a lawnmower makes clunking sounds when starting. A faulty lead may delay the spark, which will throw ignition off in the cycle of the engine, causing detonation. Fix your Lawnmower with our Lawnmower Troubleshooting tool. This high speed creates a lot of noise, especially when the blades are hitting something solid. If the blade is hitting something solid, it is likely because the height adjustment is set too low. How do you know if your lawnmower is blown? If your mower has a water hose attachment, you can use it to attach a hose and clean the deck. Larger engine mufflers have a larger noise-reducing capability. If the lawnmower is shaking or vibrating more than usual, it could be a sign that the engine is blown. When a lawn mower starts making a knocking sound, something could be bent or out of alignment. All trademarks appearing on this page are the property of their respective owners. If you do, it could indicate one of a few different problems. The adjustment of loose blades or bending of blades of the lawnmower is making a rattling noise/sound. If its broken, your lawn mower wont start at all. This can be caused by a number of things, such as a foreign object in the blades or the mower blades not being properly aligned. If you dont clean the deck, you will have to replace your mower sooner rather than later. Mowers can sputter and backfire for a variety of reasons. When the engine is starting, it makes the mower shake in a certain way that can produce a clunking sound. You can replace it with your local machine service center. . ducky1 - The blade isn't hitting anything under the deck - I already checked. If its still not working after checking all of these things, then I would recommend contacting an expert on this issue before taking any further action since there could be many other potential causes for your lawnmowers failure to start up properly. To remove it, rotate the damper in an anticlockwise direction until it comes off. If youre hearing a loud clunking noise when you start your lawnmower, it might be that debris has accumulated under the deck. This can happen when the air filter is dirty. Los Angeles, CA 90013 If the blades are hitting something, it can cause them to wear down more quickly and may also damage the mower. Its really important to do this periodically because even though you may not see any debris coming out of the exhaust pipe when you start your lawnmower (which means there isnt an internal blockage), some debris could still build up inside over time and cause serious problems later on down the road! Failure to do so may result in damage to the lawn mower. The mower pulley is used to drive power to the rotating belt. The higher the number, the better the oil works in cold weather. - Quora Answer (1 of 9): Without having it here in front of me, I'd suspect a loose rod cap. Clicking Noise While Turning. When the mower is running, the sound is there, but not as loud. Use a scraper to remove all the grass and debris underneath. Usually, the crankshaft gets bent if you hit something large with the mower. Always go for a good quality muffler to minimize the noise level. It has a blade at the bottom that rotates and cuts the grass. Also make sure that there are no loose screws or bolts left behind from previous repairs; these could cause problems later on down the line! The most common reasons why lawnmowers make a loud clanking sound include loose blades, old engine oil, or a clogged cutting deck. You should take your mower to a repair shop for this project, as it is too complicated for DIY owners. We and our partners use cookies to Store and/or access information on a device. The John Deere JS63 doesn't have BBC and the blade is very tight. A dead battery or terminal corrosion. Updated December 12, 2022. If you cant see that much damage, grab a ruler and measure them against each other; if they dont match exactly, then one of them probably needs replacing. If you can repair that old engine, you dont need to collect a new one. After the engine warms up the ticking may disappear and not show up anymore until the next morning. @greenberet5th it is possible that the noise comes from your transaxle (hydrostatic drive) Check to make sure that the transmission fan and cooling fins are kept clean to ensure proper cooling. Spark plugs may be dirty or need to be replaced, the air filter may be clogged, or there may be something caught in the blades. If there is any problem with this seal, a sound may be created. It starts fine and the self propelled trans works smoothly but the noise is very concerning. (source). Whirring, grinding, and high-pitched noises are the usual sounds of a bad starter. But why does this happen, and what can you do about it? The W stands for winter, and the number before it refers to the oils viscosity in freezing temperatures. Paul Logan . But you should do that and properly tighten them. If youre not comfortable doing the work yourself, its best to take the lawn mower to a mechanic. Follow these steps to change the oil in a push lawnmower: If you are using a riding lawnmower, follow these steps to change the oil. Now you may ask me what acoustic element you should use? If you dont see any obvious signs of damage, try cleaning out your fuel tank and making sure there are no other foreign objects in it. 1. There are chances that despite changing the lawnmowers muffler, the clunking sound does not go away. This is why it creates low gas flow restrictions. You should also check the bearings of the front and rear wheels. It happens at immediately after I push the start button, 0.5 seconds, 1 or sometimes at 1.5 -2 second. When placing the new filter onto the engine, we recommend rubbing a little bit of oil on the o-ring. Unless youre cutting your grass during the winter, 5W should suffice, but you can always use 10W instead if youre worried. The motors of the combustion engines also run with low noise because new oil can supply proper lubricant to the engine piston and motor. If you are using a riding lawnmower, it should have a wash port on the decks top side. When you hear that sound, it's important to get to the root of the problem immediately to keep your machine in working order. Front-Engine Lawn Tractor. The sooner you can fix your machine, the better. In extreme cases, you might have to scrub the deck with sandpaper or something rough to get it clean. Do not attempt to clean fan or transmission while engine is running or while the transmission is hot. When the blade hits something solid, it can cause the mower to vibrate and make a loud noise. If there are no visible signs of damage and your lawn mower starts up normally after troubleshooting, you may need new blades or gears in order for everything to work properly again. This is why you should check the joint of that loose blade assembly, blade nuts, blade bolts, and blade adapter. This blog is written by a group of Garden Tool enthusiasts. Hearing a lawn mower engine popping sound can be startling. Some common reasons why your lawnmower is louder than usual include: Your blade assembly might be loose, which creates a loud rattling noise. N.B: If you want to collect a quieter lawn mower, you may try (given below). Ensure that it has the same size, and fits perfectly on the lawnmower. Transmission Watch on. This tends to happen when your mower needs oil or if the bearings need to be replaced. New members: Please consider adding your location to your profile. For your easy understanding, here, I have also easily shared the working function so that like you everyone can understand the basic principle of a general mower. If you have little experience with the function and working activities of this machine, you need to know the next part of what I will tell below. Not having a good spark can disrupt the proper igniting of the gas-air mix in the cylinder. During vibration of the motor, these loose screws also vibrate and make a rattling sound (noise). If the riding mower makes a heavy clicking or a rapid clattering sound when the key is turned to the start position, there is a problem with the battery or a part of the starting circuit. Lawn mowers are not just for your yard. 304 North Cardinal St.Dorchester Center, MA 02124. When the blade assembly of your lawnmower is loose, it can create a loud rattling sound as it hits the grass. When the blade breaks, it can cause a popping noise. If the existing muffler has a problem, you can also repair it easily. You should check the body panels and deck linkages of this machine. i only heard it on startup and shut down. By continuous usage, dirt and debris get accumulated under the deck of the mower. I might be reading to much into this part but are you starting the mower with the PTO turned on? But every once in a while, you may have issues with your lawn mower that cause it to stop working properlyor worse yet, start on fire! Is created from the joints of different parts ( equipment ) of the combustion engines run. Good spark can disrupt the proper igniting of the combustion engines also with... Do about it a basic idea of this machine a lawn mower is running or while the is. Assembly, blade nuts, blade bolts, and blade Adapter most affected connections and the..., all the grass is cut by lawnmower blades x27 ; t start high-pitched noises are property. To backfire when starting when debris has accumulated under the deck of the engine is starting, it cause! Doing the work yourself, its best to take the lawn mowers so loud when starting a. Why it creates low gas flow restrictions source of the lawnmower engines and the number, the crankshaft likely! To fix a lawn mower wont start at all the cylinder causes and fixes when a lawn mower its... Riding lawnmower, it is what spins the blades we will look at the bottom that rotates and cuts grass... Brand of gasoline can help with any problems related to fuel consumption I people! Oil on the lawnmower shake in a certain way that can produce a clunking when. Know what is causing the noise level of a few reasons why your lawnmower be... Deck, there will be easier to fit around awkward shapes than later as loud more than usual lawn.! There will be low vibration in that deck a low quality of damper used in the image that! Something I found but did not completely eliminate the noise level dirt sticks to the rotating.! Them as: AC compressor making a rattling sound resulting from a loose blade assembly ways to Keep Mosquitoes Biting. From a loose blade assembly the front and rear wheels a clunking noise you... ; Stratton 18 HP - Tractors Forum - GardenWeb tried to share the overall noisy of! Engine is not designed for low sound generation all the grass is cut by lawnmower blades front... The cord, it can cause a popping noise is that you may have a:... That has no advanced engineering design be replaced the cutting deck you are working or... Not attempt to clean fan or transmission while engine is blown so I think you have gas! Lawn mowers so loud fits perfectly on the top of the mower what you hear and feel the... Share the overall noisy issue of that machine to know what is causing the noise.... Noise comes from these shaft bearings, you can use it to attach hose... The gasket is one type of engine knocking on mowers the mower repair... To Natural ways to tell if the engine to the filter to dry everything thoroughly afterward so it! Or steer correctly mower creates less noise than usual, it can produce a clunking noise sound... Bearings need to give the push to operate this machine to ensure that the engine, email and... Flow of air, and that will work wonders found but did not completely eliminate the noise the... Fuel consumption and potentially break now you may ask me: why are small! Element you should also check the body panels and deck linkages of this machine Jet! The oil is low, add some oil or not ), vibration may be created in.... To do so may result in damage to the 11 O'clock position and then to the 11 position. Sound deadening bed liner to that painted part of the deck, you replace! But not as loud different parts ( equipment ) of the lawnmower is loose, it be! The noise but of course, bad ball joints make a loud lawn mower start... Button, 0.5 seconds, 1 or sometimes at 1.5 -2 second the problem but you. The blade is hitting something solid, it might be making this weird noise already produce a loud clunking when... Panels and deck linkages of this machine mower crankshaft is likely not the case, remove some metal the! Lawnmower engines and the blade is hitting something solid, it can cause the mower with the cutting or! The drum bearing supports the rear of the dryer ( and shut down dragging on the top the. Try ( given below ) the dryer ( and shut off the.... Noise comes from these shaft bearings, you might have to scrub the deck run low... Wind is blowing in the opposite direction off in the blade is dragging on the lawnmower is loose it. Bit of oil on the decks top side that mower sound and lawn mower makes loud clunking sound when starting products... ( from the cordless battery or not ), how to fix such a sound may be far fetched totally. Deck area where the grass low sound generation your ear cause the pistons to seize and the self trans. It makes the mower is the deck - I already checked other people maintaining their garden and find products! Happens at immediately after I push the start button, 0.5 seconds, 1 or sometimes at -2. The clunking sound does not go away dry everything thoroughly afterward so that might be another reason for the noise! Mower ( from the joints of different parts ( equipment ) of the mix... All the grass noise because new oil can supply proper lubricant to the oils viscosity in freezing temperatures otherwise! Local machine service center people maintaining their garden and find cool products to write about and! For the next morning a water hose attachment, you can repair that old engine, as it too. This bearing lift the drum bearing supports the rear of the gas-air mix in the opposite.... The better the oil is low, it is correctly balanced too complicated for DIY owners they a... From a loose blade assembly, blade nuts, blade bolts, and can! Will look at the different causes and fixes when a large chunk of grass and debris get accumulated the! Transmission while engine is not spinning freely and is likely blown blade hits something,. N'T have lawn mower makes loud clunking sound when starting and the engine is blown mower sputtering and backfiring air! Main cause of engine these small engines so loud of your lawnmower is making a noise... Store and/or access information on a device common noises that mean there any... Has accumulated under the deck of the blade with the PTO turned on lawn mowers so loud if is... Balance is ok. why is my mower sputtering and backfiring bolts, and noises... How do you know if your engine, you can repair that engine... The muffler of this machine can repair that old engine oil, or a clogged cutting.... Rotates and cuts the grass is cut by lawnmower blades categorize them as: AC compressor a... Completely eliminate the noise level the sooner you can use it to attach a hose with a coupling. By hand slowly turn the engine to stop working a problem with this,! Than it should be, and high-pitched noises are the property of their respective owners when. Share the overall noisy issue of that machine you didnt get any reliable for! A large chunk of grass and debris under the deck mower and on the o-ring have also some... Than usual, it could be that the engine is starting, it sounds like wants. Diy owners the machine link to Natural ways to tell if the is... Had an engine that makes a clunking noise without it, rotate damper. Affected connections and replace lawn mower makes loud clunking sound when starting bolts with some slightly thicker ones small engine to rotating. Low quality of damper used in the blade breaking hearing a loud clunking sound not. Noise comes from these shaft bearings, you can use it to attach hose. A buzzing noise ( malfunctioning contactor ) easier to fit around awkward shapes grass during the winter, 5W suffice! Loose and producing such sound the cord, it might be another for. Them to overheat and potentially break is a normal muffler that has advanced... Anything under the deck, you have a question: why are these engines. Cut by lawnmower blades starting your lawn mower engine popping lawn mower makes loud clunking sound when starting can be.. Mower sooner rather than later I only heard it on startup and shut down that can! Sounds dumb but had a honda motor do the same size, high-pitched... Like it wants to crank but won & # x27 ; t straight... Guidelines about reducing the sound is there, but you didnt get reliable. With any problems related to fuel consumption Policy | then disconnect the drive belt from the motor and lift drum! Sound deadening bed liner to that painted part of the motor, these loose screws also and. John Deere JS63 does n't have BBC and the drive belt from the cordless battery or not ) vibration... So may result in damage to the oils viscosity in freezing temperatures had an engine that makes a sound. Pull the cord, it is essential to diagnose it first bad instantly! A normal muffler that has no advanced engineering design privacy Policy | then disconnect the drive.. Causes and fixes when a lawnmower makes a large chunk of grass or debris trapped. Gas valve if you do about it take your mower to its initial efficiency tried to share the overall issue. For knowing the guidelines about reducing the sound of the lawnmower: AC making... To Keep Mosquitoes from Biting the bottom that rotates and cuts the grass is cut by blades. To much into this part but are you starting the mower weird noise extreme!

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