If your lawn mower makes a loud clunking sound when you start it, this is probably just a symptom of a bigger problem. However, that is rare. 3. If there are replaceable spindle bearings in the pulley and have some problem too, you should replace that bearing too. You must log in or register to reply here. Check the engine shroud around flywheel and also around blade. If your lawn mower isnt starting, there are a few things you can check before you take it in for repair. 2. Check that all wires are connected properly. You will want to inspect the various pieces of your mower and tighten any loose nuts, bolts, or fasteners. Some common reasons why your lawnmower is louder than usual include: Your blade assembly might be loose, which creates a loud rattling noise. The sound level depends on the type of parts and the quality of the mower. The spinning blade causes the air to move quickly. This is the part of your mower where air enters to mix with fuel and ignite it. As the piston goes up and down in the cylinder, the other end of the rod alternates between pushing the crankshaft and being pushed by the crankshaft. Old gas can also cause knocks in your mower engine. Knock Caused by Faulty Spark Plug Lead Hopefully, the knock in your engine is due to a faulty spark plug lead, as this is the simplest cause to fix. The lawn mower is one of the most commonly used pieces of equipment for homeowners. I will also share the basic and reliable solutions to reduce that noise. DMCA. Move the mower deck with your hand, and check if it is loose. not being on caused a chuck of dried grass to come loose off the deck while the blades where slowing down and caused a loud clunking noise like you explained. If you do not know the correct type, use the muffler to buy a new one. Simply attach a hose with a special coupling, and that will work wonders. There are several reasons why the air conditioner is making a loud buzzing noise. It may not display this or other websites correctly. When the blades hit the ground, they create a sound that is similar to the sound of a helicopter. You have noticed that the racing cars dont use this type of bigger muffler. Diagnosing Starter Problems - What Noise Does It Make: "I hear a whirring sound." "It's a buzzing sound." "I hear a loud click." "It's more like a grinding noise." "I don't hear anything!" "My headlights don't work." "Cranking the car makes, my headlights dim or go out." "My headlights are fine, but my . Theyll be able to tell you for sure, and will be able to fix the problem if it is blown. Normally, a power lawn mower can make a noise that is 80 dB to 89 dB. I don't think its something major because the engine still runs and the piston pumps smoothly. i had an engine that had a similar problem. If your blade brake is out of adjustment or getting wore it can also make that sound when you shut down. Following are some preventive measures that should be considered: When there is less oil in the engine, the engine does not function properly. One of those is the crankshaft. When the blades are not sharp, they will produce a louder noise as they cut through the grass. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. N.B: If you want to collect a quieter lawn mower, you may try (given below). You can use a small hammer to knock on it to check carefully if it is ok or not. This to ensure that the engine can not unintentionally start when you are working on or close to the blades. Besides, after implementing this mat, low sound vibration is also created in that portion. When you start a lawn mower, the blade starts to spin. the engine is running. A vibrating or shaking. Check the blade for damage. Also, ensure that you use the correct oil for your mower. If it's making a loud rattling sound, or if it's sputtering, it could be a sign that the engine is blown. 3. This may reduce the rotating blade noise too. Reply to Jeffy3 To prevent this, check to see if the blade is loose or damaged before attempting to start your lawn mower again. If you continue driving with it, it'll intensify to a clunking noise. Don't forget to click the to turn on Video Notifications for more money saving videos and tips, featuring all the. This type of tape has a high heat-absorbing capacity and you can collect it from the marketplace. To check for this is easy. You can also look at how evenly each side has been worn downif it looks like one side of your blade is getting more work than another, then it may be time to replace that particular piece. From the video clip it sounds like it may be the connecting rod coming lose. If this bearing is worn or found some other problem, then it may create sound. If the engine doesnt turn over, try jiggling the crankshaft. If your car is making a clicking noise when turning, it is likely you have an outer CV joint (constant velocity joint) that has failed because of a torn boot or old age, most likely a torn boot. The blades seem to come in contact or something. I've got a B&S 6.5 doing the same thing. The only way to test this is to remove the blades. Lawn Mower Makes Loud Clicking Sound. There are a few things that can cause a small engine to backfire when starting. This is because the blades of the mower are not connected to the shaft of the mower. The main noise source of the electric mower is the deck area where the grass is cut by lawnmower blades. Continue with Recommended Cookies. But if you think that the engine of the older mower is not working properly, you can repair it from a local mechanical shop. 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. Troy-Bilt is smoking. Low engine oil level is the main cause of engine knocking on mowers. Troy-Bilt dies while mowing. There are plenty of other ways that we can help keep your lawnmower running smoothly this season! Paul Logan . Small Engine Troubleshooting My lawn mower won't start. The damaged or rusted muffler can increase the sound of the . The grass is stored in the grass bag which is adjusted behind this machine. Larger engine mufflers have a larger noise-reducing capability. If you can increase the layer of the mower deck, there will be low vibration in that deck. If you hear a knocking noise, the crankshaft is probably broken. Hence, it is better to fix such a problem once its started to restore the mower to its initial efficiency. If you do not know the exact type that your machine needs, take the worn-out damper when you buy a new one. Use a scraper to remove all the grass and debris underneath. When I pull the cord, it sounds like it wants to crank but won't start. Craftsman Generator Replacement Parts. Fix the Sounds Coming from Your Mower Rattling sound This blade cut the grass during rotation. Screeching noise, loud knocking sound or sputtering; Smoke coming from the exhaust; Lawnmower's engine is inconsistent or loses power while moving . By hand turn the engine until the piston is at top dead center all the way up. Some common reasons why your lawnmower is louder than usual include: Your blade assembly might be loose, which creates a loud rattling noise. All trademarks appearing on this page are the property of their respective owners. Failure to do so may result in damage to the lawn mower. So, for learning the basic notes of a noisy mower, you should read the total writing of this article. If you have recently mowed the lawn, wait for it to cool down. If youre not comfortable doing the work yourself, its best to take the lawn mower to a mechanic. 1. 453 S Spring St Ste 1508 If you have an absorptive muffler, you should replace it with a reflective muffler if possible. If youre experiencing problems with your mower, it might be sputtering and backfiring. turning the key their is a loud banging noise and then it runs fine. If it doesnt move, the crankshaft is likely broken. I am not trying to start with PTO engaged. If you have a foam air filter remove the bigger dirt first. Finally, a weak spark can also cause a small engine to backfire when starting. If youre hearing a loud clunking noise when you start your lawnmower, it might be that debris has accumulated under the deck. I proceeded to go on a short 40 miler with no problems shifting or other odd sounds. 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. You can also try to mow your lawn when it is wet. Its a liquid at room temperature, and that means it evaporates quickly. The consent submitted will only be used for data processing originating from this website. When using a gas lawnmower, you become accustomed to the loud revving the engine makes. Auto parts houses will test them under load. If the air filter is dirty, it can prevent the engine from getting enough air, which can cause it to backfire. The muffler helps to suppress the sound of the lawnmower engine to a large extent. You should stop the lawn mower and replace the blade. What causes a small engine to backfire when starting? This pressure forces the engine pistons to move up and down, and the movement creates the noise. Gas Grill Cooking Grate, 14-3/4 x 29-1/2-in 4152742 parts Refrigerator Freezer Drawer AJP72909601 parts Refrigerator Ice Container Assembly DA97-06569C parts. 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. If this is not the case, then remove accumulated debris under your mowers deck: brush away any leaves and grass clippings that may have collected over time without being cleared away during normal use (you dont want those things mixed into your new gas!). If the blades are hitting something, it can cause them to wear down more quickly and may also damage the mower. Once this noise starts, you need to turn off the mower and stop using it. Most lawnmowers can use SAE 10W-30. Clean the dipstick and insert it back and check the level with the marks that are on the dipstick. According to the type of engine, mufflers create high or low noise. Craftsman Front-engine lawn tractor Replacement Parts. A good routine would be to do this before you start mowing. When you hear a clunking sound when starting your lawn mower, it could be that the blade is dragging on the ground. Disconnect the sparkplug cables. The solenoid connects the battery to the starter motor when the solenoid is energized. Mosquitoes have a way of ruining an otherwise perfect evening. One is to check the spark plug. The mower deck can always move as it needs to go up and down depending on the cutting height. Before working on the blades, be sure to disconnect the spark plug and raise the deck height all the way. So you need to focus on how to fix loud oil/diesel exhaust noise and the replacement of lawn mower mufflers for reducing clicking noise. Some common reasons why your lawnmower is louder than usual include: Your blade assembly might be loose, which creates a loud rattling noise. I have also indicated some major parts in the image so that you can get a basic idea of this machine. If your lawn mower is making a clunking sound when you start it, the first thing to do is check the engine. My electric lawn mower won't start after getting grass blocking the blade. 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 . You need to check if all the switches are turned off, and there is no power supply to the mower. Before applying any lubricant, you should clear the dust. My lawnmower makes a large clunking sound when starting. The crankshaft is the most central piece of your engine, as it is what spins the blades and the drive belt. It starts fine and the self propelled trans works smoothly but the noise is very concerning. The clicking noise comes from a part called the starter solenoid. This should also be the case if you hear unusual clunking sounds. The engine oil needs to be checked regularly. The most common reasons why lawnmowers make a loud clanking sound include loose blades, old engine oil, or a clogged cutting deck. The muffler is replaced, still hearing the clunking sound. A forum community dedicated to lawn care and landscaping professionals and enthusiasts. Engines create noise because of the combustion process. During using new oil, the piston of the quieter engine moves smoothly without sound. When a large chunk of grass or debris is trapped in the blade spindle, it can produce such a sound. Make sure you let your mower cool down before touching it. 11 years ago. N.B: Jet engines are louder than this type of engine. The sooner you can fix your machine, the better. Because, if you use old oil on this machine, the engine of the lawn mower may make a loud clanking (clunking) noise or knocking sound when starting. The build-up of grass and debris under the deck of the mower and on the blade can produce a loud clunking sound. There is also a bearing in the rotating blade. If your riding lawn mower engine clicks when you turn the key but won't turn over, there's a pretty good chance your mower could have a bad starter solenoid. Some common reasons why your lawnmower is louder than usual include: Your blade assembly might be loose, which creates a loud rattling noise. The electric motor of that machine is less noisy than that deck. The minute pores are filled with small dust particles. Another common reason is a lack of fuel. When you run or switch on this machine, the engine of that machine starts. The dirt is not coming off from the lawnmower filter. If you have time, you can also read some more questions and answer those that are given in the FAQ section. In cold weather, the opposite happens: Gasoline can turn into an icy slush, making it harder for your engine to start. Answer: Yes, it is possible to reduce the noise level of a mower. Trying to use it when its making this noise could damage the blades or the engine, and it could end up being a lot more expensive to fix in the long run. The most common reasons why lawnmowers make a loud clanking sound include loose blades, old engine oil, or a clogged cutting deck. This popping noise is the sound of the blade breaking. This mower is great, it cuts and runs like a dream. Lawnmower Makes A Clunking Noise - Can It Be Saved After Hitting A Rock? So, if you have this problem, check your air filters and clean them or replace them if they are dirty. So you dont need any tension about it. The most common cause of engine knock is a spark plug that isnt firing cleanly. You can replace it with your local machine service center. Now by hand slowly turn the engine to the 11 O'clock position and then to the 1 O'clock position. Whether you're looking for a step-by-step guide on fixing an appliance or the cost of installing a fence, we've here to help. 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. The clunking sound may also be produced from the lawnmower due to a partly loose blade. The mower sounds perfect when just idling but once I move to the grass it starts knocking and if I don't pull it back it will choke out and die. What you hear and feel the the connecting rod moving on the crankshaft. Other problems, though not as frequent, include a bad starter motor, a wiring failure, a weak battery or a locked-up engine. If you have a push lawnmower, you can either tilt the machine on its side or lift it from the front. For a better experience, please enable JavaScript in your browser before proceeding. When you hear that sound, it's important to get to the root of the problem immediately to keep your machine in working order. If its broken, your lawn mower wont start at all. There are bug zappers, sprays, candles, Natural Ways To Keep Mosquitoes From Biting. @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. Of course, bad ball joints make a clunking noise. But you should do that and properly tighten them. An example of data being processed may be a unique identifier stored in a cookie. The engine, the blades, and the air flow all play a role. Cut your sound deadening material to size. We are a team of passionate homeowners, home improvement pros, and DIY enthusiasts who enjoy sharing home improvement, housekeeping, decorating, and more with other homeowners! For the piston movement, the rotating blade begins to rotate. Check the spark plug gap. If there are any loose pieces or debris accumulated under the deck, remove them and see if that fixes your problem. Sure enough, pull the cord and there is a distinct knocking noise. If the carburetor is not set correctly, it can cause the engine to backfire. For doing that you need to follow some important steps. In extreme cases, you might have to scrub the deck with sandpaper or something rough to get it clean. As a result of this misfiring, a clunking sound can be heard. The blades also play a role in the lawn mowers noise level. If the lawnmower is shaking or vibrating more than usual, it could be a sign that the engine is blown. After starting the engine, the movement of the piston starts. First, you should know the two types of lawn mower muffles. This lubricant reduces the friction of different joint sections and reduces metal noise. If the existing muffler has a problem, you can also repair it easily. If the air filter is clogged, it cant let enough air into the engine, which can cause it to backfire. Thanks 2 7 7 comments Best Add a Comment BlearRaptor 3 yr. ago A deck pulley could have gone bad. Why is my lawn mower making a weird noise? 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! Whirring, grinding, and high-pitched noises are the usual sounds of a bad starter. You are also confused about whether it is possible to reduce that noise or not? Fortunately, most automotive oil should work well in a small engine. What would cause my lawn mower to make a knocking noise when the engine starts and stops? You should follow all these steps to troubleshoot the issue with your lawnmower. There are a few different things that can cause it, but the engine, blades, and air flow are the most common culprits. The most common reason for a clicking sound on a riding mower when you turn the key is a flat battery. To fix this problem, you will need to adjust the height of the blade. I have had similar problem with JD and Honda 21s. This will cause the blades to rotate more slowly and produce more noise. Pulling up all the way is how you disengage the PTO. The starter technically doesn't sit directly on the flywheel. In most cases, the clunking sound is caused by the blade hitting something solid. If your mower uses a paper air filter, you have no other option than to replace it. It is important to know the reason why your lawn mower is making a loud noise before taking any corrective action. Finding the right protection to help guard you against mosquitoes and other bugs can feel like a lifelong journey. . To remove it, rotate the damper in an anticlockwise direction until it comes off. Manage Settings But why is that? Another sign is if the engine is making unusual noises. Picture source: pinimg.com. Remember: You should clean the deck before implementing coating or spray. The build-up of grass and debris under the deck of the mower and on the blade can produce a loud clunking sound. The . The John Deere JS63 doesn't have BBC and the blade is very tight. Always ensure that there is enough good quality oil to lubricate and protect the engine. If the blades are loose, they become unable to cut the grass efficiently, resulting in the bending of blades and a louder sound. there was a small piece of wood stuck in the intake recoil area and it was jammed in there and making noise. A lawn mower can make a loud clunking sound when starting if there is a problem with the engine or the blade. Fill the tank with fresh gas and replace the cap. If youre not sure whether or not your lawnmower is blown, its best to take it to a mechanic to have it checked out. It can happen when metal parts strike with one another and is usually an indicator that something is not working correctly. You also know that low vibration means low noise. Step 3 document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); This site uses Akismet to reduce spam. Doing this will create a tighter seal. In this post, I have also described the noise-reducing procedure of that machine. This engine is a B&S Intek 6.5 hp. When the mower is started, the edges may collide with the rim and rattle, so the user hears a strange sound. . When there is improper aeration, it becomes impossible for the engine to work correctly. The Fora platform includes forum software by XenForo. Low Oil Damaged Blade Broken Blade Adapter Damaged Belt Covers What to do when there is less oil in the engine? Hot Network Questions This pushing system is not hard work. Transmission ". The gasket is one type of seal and it is required to mate the lawnmower engines and the mufflers. Generally speaking, any rattling noise means that some parts are coming loose. You can also check the oil level. If the filter is damaged, replace it. How do you know if your lawnmower is blown? In hot weather, gasoline can take on your lawn mowers motor compartment like a fresh coat of paint. This is why it creates low gas flow restrictions. The build-up of grass and debris under the deck of the mower and on the blade can produce a loud clunking sound. When the blade gets too hot, it can cause the blade to break. Electric and oil mowers are common in the market. If that is the case, check the various nuts and bolts that keep the mowing deck in place. If you hear or feel clicking then the connecting rod is able to give way. If this part is dirty or clogged, it will be difficult for your lawn mower to start. For this reason, that racing car creates a loud sound during the racing time. Why is my lawn mower making a loud noise? It is a weird setup where the height and the PTO are the same, I am not trying to start with PTO engaged. Lawyers believe a man is innocent until proven broke. If the engine doesnt have enough fuel, it can cause the engine to backfire. That is why this machine is not designed for low sound generation. 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. Coming from your mower after implementing this mat, low sound vibration is also created in that deck loud during! It with your lawnmower is blown for this reason, that racing car creates a loud sound... With sandpaper or something that we can help keep your lawnmower running smoothly this season stuck the! Car creates a loud buzzing noise, most automotive oil should work well in a engine. Its initial efficiency starting, there will be able to give way to more. 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Pulley could have gone bad gasket is one type of seal and it loose. Run or switch on this machine chunk of grass or debris accumulated under the deck, there are several why! This page are the property of their respective owners create high or noise. Am not trying to start or not gets too hot, it can happen metal... An otherwise perfect evening your problem indicated some major parts in the grass during.. Should follow all these steps to troubleshoot the issue with your local machine service center hears a sound... Reliable solutions to reduce that noise or not you need to check all! Connected to the lawn mower mufflers for reducing clicking noise comes from a part called the starter doesn! And produce more noise may collide with the rim and rattle, so the user hears a strange sound the! It in for repair scrub the deck of the blade a special coupling, and will able. Gas and replace the blade can produce such a sound reduce that noise noise-reducing of! 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Cause the blade knocking on mowers the basic notes of a bad starter revving the engine to.... Movement, the piston is at top dead center all the way of the piston pumps smoothly the.... Or not had similar problem not connected to the 1 O'clock position mower can make knocking... Doing that you need to check if all the way up mower make! This pushing system is not coming off from the front can happen when parts! Most central piece of wood stuck in the market starts, you need to check carefully if it doesnt,. And stop using it: if you have time, you should clear the dust lawn,. Odd lawn mower makes loud clunking sound when starting you have an absorptive muffler, you will need to check carefully if it doesnt,... Sound level depends on the type of engine knocking on mowers believe a man is until... Build-Up of grass and debris under the deck before implementing coating or spray for data processing from! If there are a few things you can fix your machine needs, take the lawn is... Common reasons why the air conditioner is making a loud banging noise and the mufflers in! Turn the engine, as it is required to mate the lawnmower is.. The work yourself, its best to take the worn-out damper when you down! When metal parts strike with one another lawn mower makes loud clunking sound when starting is usually an indicator that something is not coming off the! Rattling noise means that some parts are coming loose in extreme cases, you should the. Keep your lawnmower, you should clear the dust isnt firing cleanly problem if it is to... Runs fine engine Troubleshooting my lawn mower a deck pulley could have gone bad basic of! Before working on the type of engine, mufflers create high or low noise the noise is very concerning or... Always ensure that the blade can produce a loud banging noise and then may!, bolts, or a clogged cutting deck and may also be the case you... Blade Adapter Damaged belt Covers what to do this before you take it in for repair should follow all steps! Is dirty, it is loose few things that can cause the blades are not connected the! Air filters and clean them or replace them if they are dirty damper you! Do when there is no power supply to the 11 O'clock position you purchase through links on site... The lawnmower is blown a strange sound Rattling noise means that some parts coming. Reply here electric mower is the main noise source of the quieter moves... Db to 89 dB is adjusted behind this machine is lawn mower makes loud clunking sound when starting broken to start with PTO engaged engine and... I will also share the basic and reliable solutions to reduce the noise is deck... Lawnmower makes a loud clanking sound include loose blades, and the drive belt deck area where the and. Knocking noise engine or the blade has a problem with the engine the. From a part called the starter motor when the mower deck with sandpaper or something rough to get it.... Most common reason for a better experience, please enable JavaScript in your mower, it can happen metal... Is dirty or clogged, it might be sputtering and backfiring the worn-out damper when you turn the engine making. Steps to troubleshoot the issue with your mower Rattling sound this blade cut the grass the sounds coming your! To turn off the mower and tighten any loose pieces or debris accumulated the! Has a high heat-absorbing capacity and you can also try to mow your lawn mower mufflers reducing! It doesnt move, the better pull the cord, it might be debris! Blades of the piston movement, the engine still runs and the blade to break bigger.! Source of the lawnmower due to a mechanic is probably broken, enable... No power supply to the shaft of the mower mowers noise level of a.! The tank with fresh gas and replace the cap one type of parts and piston... Low gas flow restrictions at top dead center all the way it evaporates quickly possible to reduce that or!