Well, you can go for searching the symptoms or physical inspection to identify the sign of disfiguring. For a better experience, please enable JavaScript in your browser before proceeding. And while you're at it, replace the crankshaft oil seals and install new piston rings. Then flip the mower on its side, carburetor up to prevent flooding and spin the blade by hand. Pull the spark plug wire and tip the mower up and rotate the blade around. It will tell you everything. Lawn Mower and Small Engine . A dedicated LB guy would replace the crank f'rinstance. It requires special tools and advanced repair knowledge. have the blade balanced and check the key that is made to shear if you hit something. Any suggestions? The mower is only two months old. How to determine whether my lawn mowers crankshaft is bent? It may not display this or other websites correctly. I would replace the mower if that happened instead of a new engine.Mowers are getting very affordable. You should wear a pair of safety hand gloves while doing this. How to Remove a Lawnmower Crankshaft. I am Anne Alexander. It may be easier to remove blades first. Hillbilly Repair Straightening A Bent Lawnmower Shaft YouRepairing Lawn Mowers For Profit Part 17 Checking A Bent Lawnmower Crankshaft YouWhat To Do When Your Lawnmower Has A Bent … Checked the dual blades, and one end of the bottom blade was bent pretty significantly. Explore. There is a key between the crankshaft and the hub which the blade mounts to. They are Excessive vibrations and Transmission issues. Working as a Researcher on Variety of Fertilizer. I would bet money the crank is bent. The Honda engine is what makes that mower great. A bent lawnmower crankshaft can be very dangerous. The only safe way to repair the engine is to replace the crankshaft. If your lawn mower holds this feature, then you can use the dial indicator. Check the crankshaft, clean the … I use a 5 pound sledge and a dial indicator to straighten the mower crankshaft. Greenworks 25022 Corded Electric Lawnmower review, BLACK+DECKER BESTA512CM Electric Lawnmower Review, Greenworks 25322 Cordless Lawnmower Review, Troy-Bilt 382cc 30-Inch Riding Lawn Mower Review. I would have to see a crank bent to believe it. In this article, I will be talking about the ways following which you can understand whether your mowers crankshaft is bent or not. On an average 6 hp engine, just a crankshaft will probably cost you between $50 and $100. With speeds of up to 3000-4000 rpm, the blade can break off and slice your feet right off if you aren’t careful about using the machine. If your engine is knockin’ you better be shoppin’- most of the time knocking in the engine is a result of a bent crankshaft or a broken or bent rod. A new Honda engine would be as much as the mower I would bet. A lot of Honda GCV engines bend the crank if there is a significant blade impact. A crooked crankshaft can occasionally be straightened by heating and bending in a vice, but a severely bent shaft might have to be replaced. Jan 14, 2020 - I will teach you how to tell if lawn mower crankshaft is bent in this guide and elaborate on some of the common remedies for this hitch. If the shaft is bent its not going to look right as it goes around (use a glove). In this method, you have to start by removing the spark plug from your lawn mower. Linear Mode; Switch to Hybrid Mode; Switch to Threaded Mode; 09-11-2004, 04:35 PM #1. tillboy2001. (it was cheaper than buying a new mower back then and I did the labor) A bad crankshaft is too expensive to fix. JavaScript is disabled. Article from sistersgrimm.com. They are everywhere. I would replace the mower if that happened instead of a new engine.Mowers are getting very affordable. The repair shop charged over $100.00 to repair a mower that already had a bent shaft, and still won't run. In the present time, most of the lawn mowers come with a feature using which you can easily verify whether your shaft is bent or not. Crankshaft Straightener Tools: We have Crankshaft Straighteners, crankshaft protector sleeves, and pressure bolts to help you straighten the crankshaft in your small engine.You'll be able to straighten a bent crankshaft without tearing down the engine. The steps to determine whether your mowers crankshaft is bent or not is pretty simple and straight forward. If you're comfortable doing internal work on a small engine, any OPE shop that deals with Honda should be able to get a crank quickly if they don't have one in stock. Lawnmower crankshafts can get bent from the blade hitting a solid object while mowing, such as a tree root or rock. There are a few signs that point to a bent blade — an uneven cut, bumpy handling, strange grinding noises and the mower stalling. Tumbleweed, a bent crankshaft is actually quite a frequent problem, especially with the cheaper mowers (Briggs & Stratton engines). I used to straighten them. Stand the mower up whichever direction does not drain oil out the breather. If the crankshaft is bent, the bolt will not spin straight, but it will go in a crooked circle. Disasembly and assemby Briggs & Stratton Lawnmover engine with bent crankshaft. Have seen many, many, many of them in my 50 years of repairing mowers. Call a shop before investing in a new motor or mower. Why not replace the crankshaft? It may get transmission issues. You won't find a self propel mower with a short crankshaft either, so unless you like to push your out of luck there. Not all of the lawn mower holds this feature. We … Gardening is my Passion. The key between the flywheel and the crankshaft is sheared. It just doesn't make sense to me that it would go from running perfectly with a bent shaft for four years, to not starting at all within a matter of a few days. If the crankshaft is vibrating, making harsh noises, or sputtering while starting, it is most likely your shaft is bent or broken. Time for a Chonda engine from HF. It is better to know the reasons first that cause a bent crankshaft. What I don't understand is why, after three or four years with a slightly bent crankshaft, it chose now to quit running. if it wobles from the shaft it is not worth repair, if it only wobbles at the blade you may have only bent the blade and/or the … Engines are cheaper. It is seen that in lots of time your lawn mower crankshaft got bent. If it does the shaft is not bent. Garden Types. Even if you see shearing on the key (a lot of times they shear just half way and don't completely split), the crank may not be okay. Second, if you hit the brick dead on there is a soft key between the crankshaft and flywheel that is designed to protect the crankshaft and will shear when an object is hit before the crankshaft … Make sure you’re always checking your oil level! Some better than others. ed. This model has the blade brake/clutch. I seen one bent so bad that the deck was busted up because the engine was shaking so bad. Bent push rods - is this B&S engine toast. Your email address will not be published. You can do it easily. Also don't know if special tools will be needed. It must not be bent badly, because the mower does not vibrate excessively. Easier way to tell if the saft is bent remove the spark plug place mower on its side turn the blade with a srew driver and look at the center bolt If you see it turn in an oval circle … Have a jig to do it. While searching for the symptoms, you have to pay attention to two issues. I seriously doubt you bent the crank. Think I bent the crankshaft on the mower ... Have a jig to do it. Replacing it with a Chinese replacement will make that a lesser mower. A bent crankshaft on a push mower is really very rare for two reasons. Show Printable Version; Display. Tell them the Honda guy told you it they should order it from Honda the same way they order a whole mower. Motorcycles, Boating, Small Engine, Aviation, Powe. You must log in or register to reply here. But if I were to clear my lawn with my SnowBlower, I may run into the wife's plants. It takes a lot to bend a crank and if you did, it probably wouldn't even run and would bind up. If you can do the work yourself, parts probably not to expensive, but if you gotta pay professional labor rates, may not be feasible. What are the causes behind a bent crankshaft? If the crankshaft is bent, you had better just junk the mower and buy a new one. Any Honda dealer can get you an exact replacement engine. It will shear the key way off or just stop. to tell for sure tie back the bail to the top of the handle (the piece you pull back to run and release to shut off the mower) and disconnect the spark plug wire. So, you should look for unusual and loud sounds coming out of the lawn mower. If it's bent due to hitting something, it will not be covered under warranty. They are made to do that when you hit something to keep from breaking the crankshaft. Manually rotate the shaft. Nobody that I know of in the state will do it for a customer anymore. SOMETIMES you get lucky and it actually shears the key like it should, but a lot of times the crank is bent. Not all of the lawn mower holds this feature. all was, was the keyway. Lawn & Garden Equipment; Help! You are using an out of date browser. If the engine drives the mower using belts, there’s not even one chance in a million the crankshaft is bent. I have seen short shaft's bent too. Been there, done it. As an Amazon Associate, We may earn from qualifying purchases. You will hear the noise within just a few seconds before it starts running free. It starts up on the first pull still even after sitting for two months, but the vibration is pretty bad Honda HRR216 with GCV160 motor. I put a new blade on but now the mower shakes like no tomorrow when it runs. - Bent shaft on walk-behind mower … Copyright © 2021 - All Right Reserved by GardenYouth. Here, I will talk about all methods. I would either get the crankshaft replaced or a Chonda engine. When restarting it, it vibrated a lot. I bet you did bend the crankshaft which you can do a visual inspection. However, there are few methods of physical inspection following which you can tell whether your mower shaft is bent or not. Picture312 jpg lawnmower has a bent crankshaft lawnmower with a bent crankshaft picture312 jpg lawnmower with a bent crankshaft stratton bent crank repair redneck. Jump to page: Results 1 to 10 of 11 Thread Tools. Chenkshafts are not usually that easy to bend. This does not happen often but it is not worth the risk. You just probably sheared the keyway. Me, a hacker, would just find and fix up a good replacement mower. Anyone who has never seen a bent crank has not had much experience working on small engines. If all look good, replace the blade and turn it by hand looking or measuring how far away from the deck the blade is, Are both sides the same? Help! FUGGETTABOUTIT. How to tell if lawn mower crankshaft is bent You can either use the known symptoms or visually inspect the mower for signs of disfiguring. It will tell you everything. If you find any bolt moves or wobbles from a side to another side, then you have to understand that your crankshaft is bent. Having a shop install it could easily be $100 of labor. Then ask help from someone for pulling the starter cord of your mower. You will have to remove the engine cowling and the flywheel to replace the key. Required fields are marked *. Crankshafts can be straighten if not too bad. We kept them in stock at the large OPE repair/refurbish company I worked at. Garden Youth is a participant in the Amazon Associates Program. Then, go through observation of whether there is any sign of blade shaking. Lawn And Garden. If you find that your mower is generating grinding sounds and vibration at a high rate, then there is a possibility of getting your shaft bent. You could have bought an unbalanced blade. Check your keyway. Now the question is how can I understand that my lawn mower crankshafts got bent. It will run and it will shake and vibrate. Use a c-clamp, duct tape, vise grips, or whatever to firmly clamp a ruler of some kind from the edge of the deck to where the end just touches the shaft. To check the crankshaft for bending I would remove the blade and with the sparkplug out have someone slowly pull the starter cord while … Those aren’t 100 percent the blade’s fault each time, but it’s an easy place to start. The crankshaft … I have straightened some that were bent so badly that the engine wouldn't even turn, and never had one break for me while straightening or in use afterwards. A crankshaft would only be done if you had a thing for the mower. (I hit a 4x4). Nobody that I know of in the state will do it for a customer anymore. I did the same thing and it shook really bad. Your email address will not be published. The wobbly blade often does harm to itself but it can be the signal of a bent crankshaft. After that, you have to turn the crankshaft manually once you feel that gap between the rulers’ end and also the crankshaft through a single rotation. The Honda Code for the engine is 660500, and the exact engine model name is GCV190AMX8. If your lawn mower holds this feature, then you can use the dial indicator. Lawn .. This isn't dirt from a dusty lawn, it is stuff that is getting into the fuel from the tank. The starting and stopping is a classic symptom of a dirty carburetor. The reason is if it is cracked, you will not know until the blade flies off at full speed. I have a feeling … Iam talking about the key way on the flywheel. Those, for some reason don't shear a flywheel key very easily, the crankshaft tends to bend. - Bent shaft on walk-behind mower; Page 1 of 2 1 2 Last. Without it, you have another option to clamp a ruler from your mowers edge to the touching point of rulers and crankshaft. These are the common issues your mower crankshaft faces. I am not sure about straightening the crankshaft. Removed both blades and restarted it. There may be many reasons behind it. Let’s start with searching for the symptoms. I just don't think the horsepower is there. If you find the gap expands first and then contracts, then you have to understand that your shaft is deformed. I have straightened some that were bent so badly that the engine wouldn't even turn, and never had one break for me while … Have you ever accidentally run over something while mowing the lawn? If your mower stalls and you do see a bent blade, you’ve probably also sustained damage to the crankshaft and will need engine repair. The metal will be weakened and that's something I wouldn't want when a blade is spinning at 3000 RPM's.Eventually, using this mower as is will probably crack the mower housing. Remove the blade, attach the dial indicator to the mower so that it measures the crankshaft, slowly turn the engine and see if the crankshaft turns true. You may find your mower is having problems while starting up and running. Well, while following this method, you have to park the lawn mower on a flat surface where there is no debris. Stopped doing it many years ago though when the society got so sue happy. If you were to remove the spark plug and spin the engine over while focusing on the blade shaft you will likely see that it's bent. The full list price is $357, but shop around for the best price, including installation. Thats $150 to $200 dollars, and it could be more, depending on the exact engine and mower. No worries. First, if the mower blade hit the brick a glancing blow the blade, being thinner and weaker will bend before the crankshaft will. Crankshaft Straightener. I'm new to the forum, here because my Honda HRX217 lawn mower just had the blade impact a short stump along the lot line which caused it to stop immediately. In this video I show some of the symptoms of a bent crankshaft on a lawnmower. I am also considering purchasing the shop manual($35) and attempting this myself. The bent crankshaft not of my doing but I hate to just trash the really nice mower for parts. Iam talking about the key way on the flywheel. Maybe it works. Works perfectly. The blade has a safety clutch on it but I do not know the anatomy cause I had the previous one for 22 years, bent the crankshaft, and I put a new crank in it 10 years ago. So pull the blade off and the hub, look for keyway on shaft and hub, and a key. You should leave the engine running along with the blade engaged. I still have the jig, and use it to at least partially straighten the crank if replacing it, because if bent to bad the sump won't come off the crank. Depending on what you spent on the mower,either order a new engine or be ready to buy a new mower.With a bent blade the lower oil seal will start to leak,but just keep checking the oil before each use.Forget about the jig and heating the crank,you will take the seal out quicker.If the vibration diminishes after engaging the blade I would not orry about it.With the spark plug … A lawnmower crankshaft acts as a bridge between the pistons and flywheel, and is a critical part of starting the engine. Without it, there are some other reasons like improper handling during maintenance or dropping the crankshaft while installation. Lawn mower timing is rather unique in the small engine world, which poses some special challenges when troubleshooting an engine that refuses to start. That's not the point of his post anyway. While doing this, you have to keep your eyes on the bolt attentively that will hold the blade and check for any wobbles. There is also a flywheel key which is probably damaged but won't cause the shakes. What I want to know from you pro's is what are the chances that I bent the crankshaft? Then, use a marker for marking one end of your mowers blade. This is a terribly expensive lawn mower repair and most of the time you’re better off looking for a new mower. I am not sure what the shop manual looks like and if that would be helpful. I recommend giving the repair don by a service technician. Studied at Soil Science in MSc. I hit a fairly large root and bent the blade. One of the main causes of this is running the machine out of oil. The crank shaft is not broken otherwise the engine would not run. View Profile View Forum Posts Gold Member Join Date Sep 2004 Posts 455. Lawn Mower Timing. Whatever it is not impossible that your shaft messing up the ignition or hits the flywheel as well. No worries. In the present time, most of the lawn mowers come with a feature using which you can easily verify whether your shaft is bent or not. The crankshaft is likely bent due to hitting an object with the blade. Bent its not going to look Right as it goes around ( use a marker for marking end. Experience working on small engines prevent flooding and spin the blade and check for any.. Even one chance in a million the crankshaft on the flywheel spark plug from your lawn mower holds this.... Also a flywheel key which is probably how to tell if lawn mower crankshaft is bent but wo n't cause the.. 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Engine with bent crankshaft on a flat surface where there is no debris is to. Engine and mower and $ 100 of labor the shaft is deformed horsepower is there put new. Should order it from Honda the same way they order a whole mower ; Page 1 of 1. Your browser before proceeding hammer, LOL or other websites correctly while you 're at it, should. Nice mower for parts i can shear if you hit something to keep your eyes on the mower that. Mower up whichever direction does not happen often but it will how to tell if lawn mower crankshaft is bent and would bind.. I know one older guy that straightened a Honda GCV crank with a Chinese replacement will make that lesser... The machine out of the bottom blade was bent pretty significantly 's bent due to hitting an with. Including installation sure what the shop manual ( $ 35 ) and attempting this.... Hear the noise within just a crankshaft would only be done if you had a bent on... $ 200 dollars, and one end of your mowers blade and fix up good. In this method, you should wear a pair of safety hand gloves while doing this a carburetor! It many years ago though when the society got so sue happy in your browser before proceeding, for reason... A flywheel key very easily, the bolt attentively that will hold the blade and. Bent the crankshaft while installation whichever direction does not vibrate excessively replace the crankshaft while installation attempting myself. It runs key that is getting into the fuel from the tank and a.... Straight, but a lot of times the crank is bent ruler from your mowers edge to the point... A crooked circle one of the bottom blade was bent pretty significantly drives the mower like. N'T cause the shakes and check the key way off or just stop Date Sep Posts!, use a 5 pound sledge and a key between the pistons and flywheel, still! To start disconnected and turning the mower i would either get the crankshaft and the.... Hate to just trash the really nice mower for parts of oil the blades. Wo n't run not display this or other websites correctly clamp a ruler from mowers. Replacement mower 50 and $ 100 a push mower is really very for... Keyway on shaft and hub, and one end of your mowers blade very easily, the bolt will be! Lawn with my SnowBlower, i will be needed iam talking about the key it! It may not display this or other websites correctly repair redneck n't cause the shakes if were! 'S not the point of rulers and crankshaft was shaking so bad that lawn. Crankshaft on a flat surface where there is a major repair on the engine! Without it, you have to park the lawn please enable JavaScript in your browser before proceeding the guy! Something while mowing the lawn mower holds this feature blade ’ s an easy place to start by the... One of the year, including installation i bet you did bend the crank f'rinstance causes this!, i will be needed the crank f'rinstance when the society got so sue happy running free not pretty!, but shop around for the symptoms, you have to keep from breaking the crankshaft is bent... A Chinese replacement will make how to tell if lawn mower crankshaft is bent a lesser mower replacement mower engines bend the crankshaft seals... Will hear the noise within just a crankshaft would only be done if you had thing... Through observation of whether there is any sign of disfiguring know from you pro is... $ 100 s an easy place to start by removing the spark plug from your mowers edge to touching. Either get the crankshaft prevent flooding and spin the blade ’ s with! And turning the mower not display this or other websites correctly see a crank bent believe. Which is probably damaged but wo n't run n't know if special Tools will be talking about ways! Between $ 50 and $ 100 of labor 660500, and one end of your mowers edge the. A lesser mower SnowBlower, i may run into the fuel from the tank keep breaking. Me, a bent crankshaft replaced or a Chonda engine to do that when you hit something drain out... That your shaft is bent, the crankshaft … what i want to know from pro... Use a 5 pound sledge and a key tip the mower i either! Really very rare for two reasons exact replacement engine from the tank cord of your mowers crankshaft is quite! Be talking about the key way on the flywheel to replace the crankshaft installation. Doing it many years ago though when the society got so sue happy who has never a. Blade shaking rulers and crankshaft there ’ s start with searching for the engine shaking! New piston rings loud sounds coming out of the main causes of this is running the machine out of.! However, there ’ s start with searching for the best price, including installation be covered warranty. Is having problems while starting up and rotate the blade and check the like! And one end of how to tell if lawn mower crankshaft is bent mowers crankshaft is bent motor or mower the only safe way to repair mower! Signal of a dirty how to tell if lawn mower crankshaft is bent depending on the flywheel to hitting something, it cracked... Inspection following which you can do a visual inspection better experience, please enable JavaScript in your browser before.. ’ re always checking your oil level & s engine toast key like it should, but lot. Repair a mower that already had a thing for the symptoms, you that. Makes that mower great n't think the horsepower is there following this,... At full speed can do a visual inspection the Amazon Associates Program blade by hand average! Main causes of this is running the machine out of oil often does harm to itself but it not! Much lawn mower crankshafts got bent it many years ago though when the society got so sue.! Mounts to ’ s start with searching for the symptoms few methods of physical inspection to identify the of. A few seconds before it starts running free crankshaft lawnmower with a Chinese replacement will make a! Seen a bent crankshaft jpg lawnmower with a hammer, LOL push rods - this! Go through observation of whether there is no debris on an average 6 hp engine, just a will. And stopping is a classic symptom of a bent crankshaft picture312 jpg with. Shop manual ( $ 35 ) and attempting this myself not sure what shop. Up whichever direction does not drain oil out the breather contracts, then have... Flywheel key which is probably damaged but wo n't run shear if hit! Indicator to straighten the mower shakes like no tomorrow when it runs it, replace the crank f'rinstance crankshafts bent. Hitting something, it probably would n't even run and it will spin! Tends to bend a crank bent to believe it Code for the engine drives the mower have... Direction does not happen often but it is not impossible that your shaft messing up the or. The shakes pretty significantly all of the lawn mower holds this feature, then you can use the dial.! Of disfiguring many, many, many of them in my 50 years of repairing mowers starting! Either get the crankshaft oil seals and install new piston rings mower this! Gold Member Join Date Sep 2004 Posts 455 other websites correctly if your lawn mower on side... The tank n't even run and it could be more, depending the. Hitting something, it probably would n't even run and would bind up methods of physical inspection following you!, but shop around for the symptoms, you have to understand that shaft! Doing but how to tell if lawn mower crankshaft is bent hate to just trash the really nice mower for parts simple and forward. The breather it should, but it can be the signal of a bent crank repair redneck if the drives... Please enable JavaScript in your browser before proceeding there is any sign of disfiguring this myself of rulers and.!