A few months ago I had a slight engine vibration on my Toro Timemaster. I believe I didn’t hit anything and all the common reasons you mentioned seemed ok. After a couple weeks I finally found one of the three engine mount bolts was loose. I tightened the bolt and the vibration stopped.
@@mjg263 how did you know that was the bolt and how did repair it. Pls explain it to me because I think mine has the same issue, I appreciate a lot if you answer me. Thank you.
@@jodybrownbrown5411 I noticed that the whole engine shook when it was under a load and also when I shut it off. There are 3 bolts underneath that hold the engine down to the frame, all 3 were loose on mine. 2 of them are pretty easy to get to, the 3rd one you need a long extension or a deep socket (can’t remember which) to reach but it’s not hard to do. All this time later and mine is still just fine, I luv that mower and my SR4’s
Your videos are better made, clearer and better explained than most others INCLUDING ONES MADE BY SMALL ENGINE AND CARBURETOR MANUFACTURERS. Thank you very much.
Thank you for the lesson on vibration. I now have hope that I can bring back my 1960's two stroke rope pull craftsman to its original charm. After hitting something, and the vibration afterward I was sure the crank was bent. It may be but I'm hoping its the blade, or flywheel key? Dony boy your a gift to all in the you tube classroom!! Blessings and all the best from New Rochelle, N.Y.
Great info Don! The "loudest" noise when mowing is when the push mower stops. All useful info too when picking up a pushmow that has been set out to the curb. Thanks again Don.
Sometimes it’ll just run poorly. Just had a Tecumseh in here with a sheared key, it started right up without kicking back but it ran too rich like the choke was on.
I've seen all of those conditions over the decades... and bent mower decks and broken spindles on zero turns and mid-mount mower decks on garden tractors. It kind of goes with the territory in my area with stones, exposed roots, tree stumps, and even exposed bed rock. In conversations with friends it seems that we all have to regularly fix our elderly parents' mowers. This as they don't see well or react well to obstacles... Me, I'm planning ahead and teaching my sons how to fix these kinds of problems so they can fix my stuff in the future. 😉
I’ll be checking my mower tomorrow based on this video. I had a really rough day with vibrations from both my mower and weed eater. My forearms and hands are pretty worn out and numb. I do hit tree roots and other objects if the grass is high and I can’t see what’s under there when I’m in a client’s yard. I just assumed my mower could take the abuse but I guess not! What an expensive assumption. Hopefully I won’t have to replace the mower. It was pretty smooth in the beginning.
Good morning ☀️ Donny it could also vibrate do to a bent crankshaft I remember in one of your older post you started a machine with a bent crankshaft & it went crazy.
Thank you I'm going to try to replace the blade and see if that works. I ran over a big clunk of metal that seemed to be half buried I didn't see in the shrubs and then apparently there was a yarn ball that was buried that I had no idea about from the previous people that just had so much litter in their yard over the years so my lawn mower started shaking and sounded like a garbage disposal I'm going to see if replacing the blade will help.
Thanx for the reminders I made the mistake of 'chopping leaves' with the mower - I swore off of that bad habit and usually use a double blade to add 'flywheel' if I do but this little mower should NOT have been abused since it ran so well - so I knew all three conditions but it was nice to have a reminder - my guess is the key sheared a bit - or my hope is the key sheared a bit - maybe a bent blade I will find out now that it is spring out
On higher quality units like Honda's the crankshaft is bolted to a thick steel disc. The blades are fitted to the disc. That disc can get bent and cause vibration if you really hit something hard. Another great Vidya.
I have a disc shaped lawnmower blade assembly & I was getting a knocking noise & a bit of a vibration because the clearance between the blade boss & the crankshaft was 0.1 millimetres which was causing some sloppiness in the blade assembly. I used Loctite 620 to fix the problem & I've done some mowing with it since. Worn wheel bushes or bearings also caused an exaggerated vibration as well !
Usually mine vibrate because my neighbor likes to place rebar lot pins at the back of my lot and I usually mow that lawn no more than once per quarter. PS: Is that a 21" blade on a 22" deck?
Looking at some of those bent blades I would think they bent the crankshaft as well. I've straightened a few of those, there's no guarantee of the outcome.
I have seen a fair amount of Honda, Husqvarna, Troy Bilt, and a few of the newer craftsman mowers with cracked engine mount holes on the deck that caused vibration. Most of them surprisingly did not even have a bent crankshaft or heavily damaged blade. However I don’t know if the blades were replaced afterwards. I haven’t seen it happen to a Toro or older craftsman no matter how abused they were. Just my personal experience
Thank u friend its time for me to change my blade . I have a question, my brother gave me a 4cycle grass trimmer & it vibrates to the point where it numbs my arms 😩
Just fixed a mower last week where the owner hit a chunk of concrete the yard and it bent the blade and sheared the two pins on the blade adaptor. Fortunately the crank did not get bent, so a new blade, new blade adaptor, and a new blade bolt (old one had boogered threads from the incident) and the mower was back up and going with just $40 worth of parts.
for anyone who replaces a flywheel key, make sure it's a genuine part and/or made out if aluminum. it's meant to shear and should be made of a softer metal. As far as bent crankshafts, it's best to buy a new mower or engine. sometimes the metal is poorly heat treated, I have seen the shaft completely snap off before. better safe than sorry.
@@donyboy73 I suppose excessive vibration from a damaged blade or crankshaft could cause the crankshaft bearings to wear out quickly, but I never ran a mower with excessive vibration long enough to find out.
@@donyboy73 Friend, is Meteor piston good for 372 xp saw compared to OEM Mahle? I mean power. Apparently the cylinders are worse? Is it possible to install 1 ring in a pile 372 xp with a new piston as before there were 2 rings ...
i recently sharpened the blade on a mower for a neighbor. i rarely have to balance blades but theirs needed it. i don't even know how they ran it. the blade was so far out of balance that it would shake sideways.
Hey man, in my mower I noticed that when the grass flap is down, it vibrates really bad, but when I bungee it up, the vibrating stops or at least lessens. Do you know why this is and how to fix it
My electric lawn mower suddenly started vibrating and making a loud noise. I never hit anything. Mower was running smooth and I stopped to empty the bag and all hell broke loose when I immediately restarted it. The blade WAS somewhat worn... I removed the blade and restarted to see if that was the problem. It remained loud and vibrated without a blade installed and there was NO visible wobble on the crankshaft. My mower doesn't appear to have a flywheel at all, and no, it's not missing... there is no space or groove for one. What is the problem??
Blade on my Honda pushmower did not look bent, but had vibration.Bought a new blade, and it runs like new. Could not keep the old blade from loosening itself, was first tip something was wrong
Years ago I was using the lawnmower and my dad parked his car where I was cutting the grass and the blade hit a piece of metal. It flew right through the door and landed on the passenger seat. After that small incident the lawnmower shaked a lot. The blade bent and the crankshaft was also bent.
Hit a berm with my lawn boy hard enough to stop it... didn't bend the crank, but a few weeks later the main bearings failed, causing the flywheel to walk enough to hit the coil and not crank. Almost got away with that one... Shame, ended up replacing it with a riding mower.
I am not being ugly, but if you think that blade was bent ,you should see the blades that came off off the john deere that my neighbors took in to repair. It is a 42 inch deck ,and all but one and was completely bent down,just like a tiller
All good reasons to step up to a mower with belt drive to the blade which will give you the same protections to the engine that a rider lawnmower has. Mandrel repair is normally much cheaper than engine repair.
A lot of people just get the wrong blade. For the lawn mower that has the wrong size of hole. Hoping a washer will hold it on there period instead of getting a filling spacer. People just hope for the best in people people don't mind selling you the wrong product.
I can't help but notice you've been having some focus issues lately, have you changed cameras recently? It is just annoying, (to me anyway) not being a troll but your videos from say 3 years ago didn't have this issue. You're a great guy doing all these videos for us and just want the channel to be the best it can be.
If your mower vibrates, it means you don't know how to take care of sh*t and, ALL privilege of owning any power tools, have been revoked. Here a hand reel mower and have fun. NEXT !
Watch my video on how to replace a lawnmower flywheel key here;
th-cam.com/video/FwBMBRk852M/w-d-xo.html
You are the King of small engine repair 🤝🛠️
He really is.
I guessed bent blade, loose motor mount bolts and worn out wheels. Crank was #4 but I never considered the flywheel key. Good stuff Dony!
A few months ago I had a slight engine vibration on my Toro Timemaster. I believe I didn’t hit anything and all the common reasons you mentioned seemed ok. After a couple weeks I finally found one of the three engine mount bolts was loose. I tightened the bolt and the vibration stopped.
@Billy Goat same thing happened to mine. I thought it was a rod knock at first but was very relieved to find it was just loose engine bolts!
@@mjg263 how did you know that was the bolt and how did repair it. Pls explain it to me because I think mine has the same issue, I appreciate a lot if you answer me. Thank you.
@@jodybrownbrown5411 I noticed that the whole engine shook when it was under a load and also when I shut it off. There are 3 bolts underneath that hold the engine down to the frame, all 3 were loose on mine. 2 of them are pretty easy to get to, the 3rd one you need a long extension or a deep socket (can’t remember which) to reach but it’s not hard to do. All this time later and mine is still just fine, I luv that mower and my SR4’s
Smart design making the key shearable. Good video, thanks.
They might be aluminium.
Your videos are better made, clearer and better explained than most others INCLUDING ONES MADE BY SMALL ENGINE AND CARBURETOR MANUFACTURERS. Thank you very much.
Thank you very much!
Thank you very much!
Thank you for the lesson on vibration. I now have hope that I can bring back my 1960's two stroke rope pull craftsman to its original charm. After hitting something, and the vibration afterward I was sure the crank was bent. It may be but I'm hoping its the blade, or flywheel key? Dony boy your a gift to all in the you tube classroom!! Blessings and all the best from New Rochelle, N.Y.
You can do it!
Great tip looking at the bosses mower tomorrow hope it's just a flywheel key
Great info Don! The "loudest" noise when mowing is when the push mower stops. All useful info too when picking up a pushmow that has been set out to the curb. Thanks again Don.
Thought about them all except the blade adapter. Thanks for telling us your secrets.
Thanks for the video dony.. have a great day
I had the shear pin break once, I forgot what I hit (CIRCA mid 1970s). I wish I had your video on that repair back then.
Top stuff Donny mate cheers from Australia to Canada.
It the key is sheared the timing will be out and the mower will pull the strter cord handle/cord out of your hand when you try to start it.
Sometimes it’ll just run poorly. Just had a Tecumseh in here with a sheared key, it started right up without kicking back but it ran too rich like the choke was on.
Vibration will kill bearings seals and eventually ur mower. Another helpful vid Don
I've seen all of those conditions over the decades... and bent mower decks and broken spindles on zero turns and mid-mount mower decks on garden tractors. It kind of goes with the territory in my area with stones, exposed roots, tree stumps, and even exposed bed rock. In conversations with friends it seems that we all have to regularly fix our elderly parents' mowers. This as they don't see well or react well to obstacles... Me, I'm planning ahead and teaching my sons how to fix these kinds of problems so they can fix my stuff in the future. 😉
Yet more good advice. Thank you Donnie.
I’ll be checking my mower tomorrow based on this video. I had a really rough day with vibrations from both my mower and weed eater. My forearms and hands are pretty worn out and numb. I do hit tree roots and other objects if the grass is high and I can’t see what’s under there when I’m in a client’s yard. I just assumed my mower could take the abuse but I guess not! What an expensive assumption. Hopefully I won’t have to replace the mower. It was pretty smooth in the beginning.
Good morning ☀️ Donny it could also vibrate do to a bent crankshaft I remember in one of your older post you started a machine with a bent crankshaft & it went crazy.
yes I mention that in video
@@donyboy73 LOL Pay attention in class!
thanks for sharing your knowledge really appreciate it take care and have a wonderful weekend
Thank you for an excellent video. Very helpful, easy to understand, and good camera setup.
Awesome video,my mower blade was chipped from both ends, thanks
Thank you I'm going to try to replace the blade and see if that works. I ran over a big clunk of metal that seemed to be half buried I didn't see in the shrubs and then apparently there was a yarn ball that was buried that I had no idea about from the previous people that just had so much litter in their yard over the years so my lawn mower started shaking and sounded like a garbage disposal I'm going to see if replacing the blade will help.
Thanx for the reminders I made the mistake of 'chopping leaves' with the mower - I swore off of that bad habit and usually use a double blade to add 'flywheel' if I do but this little mower should NOT have been abused since it ran so well - so I knew all three conditions but it was nice to have a reminder - my guess is the key sheared a bit - or my hope is the key sheared a bit - maybe a bent blade I will find out now that it is spring out
Great tips from a professional 😀
On higher quality units like Honda's the crankshaft is bolted to a thick steel disc. The blades are fitted to the disc. That disc can get bent and cause vibration if you really hit something hard. Another great Vidya.
Good information buddy. Keep the great videos!!
Thank you for sharing this information. ❤️🇨🇦
I have a disc shaped lawnmower blade assembly & I was getting a knocking noise & a bit of a vibration because the clearance between the blade boss & the crankshaft was 0.1 millimetres which was causing some sloppiness in the blade assembly.
I used Loctite 620 to fix the problem & I've done some mowing with it since.
Worn wheel bushes or bearings also caused an exaggerated vibration as well !
I have seen a few where the bolts holding the motor to the deck are loose. Easy fix unless the holes in the deck are rusted out.
Always a good idea to remove rocks, bricks, old boat anchors etc from your lawn before mowing.
Usually mine vibrate because my neighbor likes to place rebar lot pins at the back of my lot and I usually mow that lawn no more than once per quarter.
PS: Is that a 21" blade on a 22" deck?
Thank you! Now I know what to look for.
Good info Dony! How about a blade installed upside down? Have a great weekend Dony, 👍👍
usually won't vibrate but won't cut as good!
Looking at some of those bent blades I would think they bent the crankshaft as well. I've straightened a few of those, there's no guarantee of the outcome.
one of the blades came off the mower I showed with the bent crankshaft
I have seen a fair amount of Honda, Husqvarna, Troy Bilt, and a few of the newer craftsman mowers with cracked engine mount holes on the deck that caused vibration. Most of them surprisingly did not even have a bent crankshaft or heavily damaged blade. However I don’t know if the blades were replaced afterwards. I haven’t seen it happen to a Toro or older craftsman no matter how abused they were. Just my personal experience
Thanks for the info! Very helpful.
Thank u friend its time for me to change my blade . I have a question, my brother gave me a 4cycle grass trimmer & it vibrates to the point where it numbs my arms 😩
Just fixed a mower last week where the owner hit a chunk of concrete the yard and it bent the blade and sheared the two pins on the blade adaptor. Fortunately the crank did not get bent, so a new blade, new blade adaptor, and a new blade bolt (old one had boogered threads from the incident) and the mower was back up and going with just $40 worth of parts.
for anyone who replaces a flywheel key, make sure it's a genuine part and/or made out if aluminum. it's meant to shear and should be made of a softer metal.
As far as bent crankshafts, it's best to buy a new mower or engine. sometimes the metal is poorly heat treated, I have seen the shaft completely snap off before. better safe than sorry.
I actually replaced the blade on my mower because it wasn’t cutting right, was vibrating and the engine felt like it was forcing a lot of power
You did the right thing.
it's actually hard on the engine when it vibrates
@@donyboy73 I suppose excessive vibration from a damaged blade or crankshaft could cause the crankshaft bearings to wear out quickly, but I never ran a mower with excessive vibration long enough to find out.
@@averyalexander2303 yes it could!
@@donyboy73 Friend, is Meteor piston good for 372 xp saw compared to OEM Mahle? I mean power. Apparently the cylinders are worse? Is it possible to install 1 ring in a pile 372 xp with a new piston as before there were 2 rings ...
Reason #4: some mowers vibrate just because they’re happy.
Hee Hee!
I didn’t know you watch DonyBoy 😂
@@EthanAdey I have a lot of stuff that breaks down.
Great videos, I have a simplicity zero turn. The Hydro gear whines. Works like it should. But whines more than it should. Is there a fix for that
i recently sharpened the blade on a mower for a neighbor. i rarely have to balance blades but theirs needed it. i don't even know how they ran it. the blade was so far out of balance that it would shake sideways.
THANK you!!
After I replaced the blade, my wife no longer uses the mower! :P
Hey man, in my mower I noticed that when the grass flap is down, it vibrates really bad, but when I bungee it up, the vibrating stops or at least lessens. Do you know why this is and how to fix it
What about the cylinder mower that kicks back occasionally On starting? Cheers Don from
England.....
On blade holder my 2 pins sheared off. Can blade be held with bolt alone?
What can be the cause for snowblower?
My electric lawn mower suddenly started vibrating and making a loud noise. I never hit anything. Mower was running smooth and I stopped to empty the bag and all hell broke loose when I immediately restarted it. The blade WAS somewhat worn... I removed the blade and restarted to see if that was the problem. It remained loud and vibrated without a blade installed and there was NO visible wobble on the crankshaft. My mower doesn't appear to have a flywheel at all, and no, it's not missing... there is no space or groove for one. What is the problem??
Blade on my Honda pushmower
did not look bent, but had vibration.Bought a new blade, and it runs like new. Could not keep the old blade from loosening itself, was first tip something was wrong
Years ago I was using the lawnmower and my dad parked his car where I was cutting the grass and the blade hit a piece of metal. It flew right through the door and landed on the passenger seat. After that small incident the lawnmower shaked a lot. The blade bent and the crankshaft was also bent.
hi Don, just wondering if you could help me,i have a stilh weedeater that backfies all the time,what do you think causes this , thank you.
So if I have a bent crank shaft your saying it’s cheaper to buy a new mower then bring it in to fix it?
Hello,why is the Haski 55 flowing gas through the breather valve.Is it necessary to replace the valve?Thank you for the info.Ros.
What do you think about the briggs and stratton motor that you never change the oil
Hit a berm with my lawn boy hard enough to stop it... didn't bend the crank, but a few weeks later the main bearings failed, causing the flywheel to walk enough to hit the coil and not crank. Almost got away with that one... Shame, ended up replacing it with a riding mower.
Hi Donny, my lawn mover Brigg&Stratton new (BenMark ) when stop engines 2 seconds make noise please tell me reason or normal Thaks
I am not being ugly, but if you think that blade was bent ,you should see the blades that came off off the john deere that my neighbors took in to repair. It is a 42 inch deck ,and all but one and was completely bent down,just like a tiller
All good reasons to step up to a mower with belt drive to the blade which will give you the same protections to the engine that a rider lawnmower has. Mandrel repair is normally much cheaper than engine repair.
A lot of people just get the wrong blade. For the lawn mower that has the wrong size of hole. Hoping a washer will hold it on there period instead of getting a filling spacer. People just hope for the best in people people don't mind selling you the wrong product.
I can't help but notice you've been having some focus issues lately, have you changed cameras recently?
It is just annoying, (to me anyway) not being a troll but your videos from say 3 years ago didn't have this issue.
You're a great guy doing all these videos for us and just want the channel to be the best it can be.
"What can I do?" "You can buy a new XYZ." " :( "
You forgot number 4, it also vibrates if you drink too much coffee.
haha yes!
#1 reason- the motor is running
If your mower vibrates, it means you don't know how to take care of sh*t and, ALL privilege of owning any power tools, have been revoked. Here a hand reel mower and have fun. NEXT !