As others have mentioned, a length of pipe will work to straighten the crankshaft. I keep several different lengths and diameters as well as using handles off my various floor jacks. Canvas people who work on stainless enclosure frames for boats always have scrap lengths to discard and these are extremely strong in the heavier thicknesses.
Hammering the crankshaft was a good move, and it looks like it really helped. This is a base model, i am guessing 20 years old, so I don't know how much you will sell it for eventually, but it probably won't be in Honda or Toro territory, so you are keeping the parts costs in line with what it might be worth at the end.
I did that bent crank fix on a mower that I had damaged. With the use of a heavy hammer I did get the rest of the season from it. This was 20 or more years ago. It was not perfection, but it did drastically reduce vibration.
I've straightened a couple of crankshafts on lawnmowers using the same method. I like to remove the blade adapter if I can to keep it from getting damaged, and to give me a better surface to strike with the hammer. I'd also give yours another whack or two just to get it as close as possible. Works pretty well though, and definitely helps get the mower usable again for a while longer.
Hit the crank with the hammer! Works good enough... as another famous small engine repair TH-camr always says... "It ain't a space shuttle we are working with here!". Great video, keep 'em coming.
5lb sledge hammer and a homemade dial indicator (1/4” threaded rod bolted to a magnet). Sharp square blows directly on the crankshaft exactly where the indicator says the high spot is. Repeat as necessary and with a little patience you can get that shaft damn near perfectly true again. If you keep the blade adapter on there you will divert the hammer energy needed to solve the problem and run the risk of cracking or bending the blade adapter making the vibration problem worse, you’ve got to knock the shaft cleanly and squarely. The crank can be cleaned up and smoothed out with a flap disc or a hand file, believe me I’ve done soooo many of these.
I've used a large hammer against the blade adapter and it did help. Eventually, I took it to a shop where a friend repairs motorcycles and used a press to straighten out more. It went from being .125" out to about .030" inches out and that made the mower work as needed without undue vibration. Out mower shop in town has a fixture to straighten crankshafts with the engine still assembled but they stopped doing the service because of getting too spooked by garage liability.
Many mower shops have crankshaft Straightener tool like a Stens 751-032 that bolts to the bottom of the engine the main advantage of a tool like this is that it does not put any impact load on the bottom motor casting if crank is realy badly bent its an option to think about. its not a tool any homeowner is going to buy due to its cost . If you are going to try and straighten it with a sledge hammer make a sleeve and weld a washer on the end to protect the shaft, never strike directly on the shaft itself (you hammered on the blade adapter for this very reason) Stens does make a shaft protection sleeve tool designed special for this task 751-065 for 7/8 shaft and 751-081 for 1" shaft with a threaded cap (so you can use a bolt to pop it off when it gets stuck when you are trying remove the sleeve after your repair.. a thanks to Taryl for awareness upon these tools..
It's a shame the crank is bent. I would give this mower to someone who needs one but can't afford one. It will get them by for a couple of years maybe, if they take care of it. I would have hammered on it a bit more, but I am OCD. And no, unless I had a large business, I would not purchase the tool for straightening the crank. The lower crank seal may leak now after the damage, so I would be sure to advise the new owner of it along with the other potential engine problems. Love your videos . I am a subscriber. I always give you a thumbs up. This is a good channel for the diy'er.
Hammer trick works , my great uncle showed me this trick and I have used this trick a couple of times and got very close too dead one , patience is the key , he always said
A Donor engine would be nice, there’s plenty of these engines out there. In Australia Victa use a 50mm shaft and Masport use a 70mm shaft Honda unknown. Note in descriptions cleaner not listed nor air filter link, for those needing one. I use a standard liquid degreaser in a 2L pressure pump which I find works better than spray only.
I this week picked up a free mower with a briggs quantum motor on it a yardman that the front wheels completely rusted off of. The motor runs great and starts first pull. So I think I'm going to stick it on a new deck I have laying around and sell it this spring.
@@INSIDEHOUSEGARAGE update I did it and it runs and cuts like a champ! Kinda impressed me how good it turned out. The old Briggs quantum motors are great!
A 3 foot length of gas pipe over the shaft would work in a pinch. ;) Taryl Fixes All has one of those shaft straighteners. Pretty slick if you plan on doing a lot of shafts.
@@INSIDEHOUSEGARAGE Back in '78 I watched my pop straighten a rod on a Kawasaki 750 2 stroker with nothing but a block of wood and a c-clamp. That was so old school. Anything is possible when you put your mind to it. Put trust in the Creator. He always has the answer. Your channel is one of my "calms" in this global "storm" so keep those videos coming! ~Honk~
Great video!!! I look forward to your videos every week and they have truly helped me with multiple repairs on mowers, blowers and trimmers. BTW, where did you get the round scraper you used to loosen the grass under the deck? I spent about an hour looking for it but so far, no luck. Thanks......
thank you Darris Curry, unfortunately I picked the scraper up, from some free junk, someone was giving away, so I have no idea, where they got it from .
Rpms seem a little bit low, bend the metal anchor point on the end of the spring, other than that, let it roll. I love that style of engine because they are simple and really durable. I ran one for 2 hours without oil trying to get it to lock up or spin a bearing or chuck a rod. Nothing happened, I took it apart to make sure that everything was in good working order and sold it. That made that style of engine my favorite, just by the durability.
The way I clean my ATV is I just use a wet microfiber rag with a little bit of dish soap, after that I just use a regular bath towel to dry it all off. It makes the machine look like new without having to buy any treatments.
This is the same mower I have! But my problem is extremely high rpms from start even adjusting the idle arm and can't figure out what's wrong I'm just gonna get new springs for the carb and see if that fixes it
Slip a deep socket over the crank usually 3/4, 7/8, or 1in/25. Bolt it on then wack away. I personally don't sell mowers with bent cranks, then get parted out. Few days ago i came cross a freebie. Guy hit something so hard that the sump cover broke off.
do what you have to do i have done it to fix bent steel mower decks while mowing before but no bent crank shafts yet owning a mowing business i might have to soon i would do it
I have tried to hammer them straight, with limited success. I have also tried a 6 ft pipe to bend it back, also not a perfect fix. Best way is to find a mower with a shot frame and good engine and swap the engine. You can use the original shroud and gas tank to make it look like the original.
Last year, my brother hit a pipe that we never knew was in my mom's back yard and bent the crank on a mower that we had for over thirty years. Not worth the fix. I was going to look online for a newer used mower. I happened to find a usable one a block away from my house and took it. On its maiden voyage a couple of months ago I bent the crank on another pipe! This time I tried to straighten it with a friend. We couldn't find a pipe like others had suggested (and I firmly believe that is the way to go). Instead we removed the blade and adapter and proceeded to hammer it and we did manage to straighten it out significantly. Before fixing it, the mower was really difficult to use because all the shaking make my hands and wrists hurt. After the fix it's not perfect, but it is much better. A couple more whacks would probably make yours better too.
It is definitely worth to straighten it. Even if u were thinking about keeping this mower these Briggs classic motors last forever. I just changed the oil in my dads motor for the first time in 21 years and changed out the carb diaphragm/gasket and now the thing runs like it did new
Tim Gross (aka Taryl Dactal) on his TH-cam channel Taryl fixes all has fixed bent crankshafts both ways either using the straightening tool or just by using a lump hammer 🔨. The engine was smoking because it was tipped in its side & some oil may have got trapped inside the PCV valve then sucked into the carburetor,the spark plug in mine runs the same colour (grey) so the engine is still good. It was starting to go black,oily and Sooty before I replaced the piston rings almost 3 years ago !
Eric. It seemed like the hammer helped a lot. I wouldn’t buy a $400 tool. Maybe you can give it a few more tabs and maybe it will be straight again. Keep up the great work.
I was recently given. key start self propelled honda that had a pretty gnarly crank on it. I decided its a 250$ mower I might as well throw in a 30$ crank and 1 hours time. runs like a top now.
Well, unless you are running a mower repair shop and doing a land office business; I'd stick with the hammer solution, especially on a base mower such as this one. Good video.
If it’s for experimental use or for my own use, I’d give it a try. However, I’d be very hesitant to sell a mower with a straightened crankshaft. There will be some metal fatigue from the bending back and forth. It might not be much, but I’d rather not risk it.
A friend of mine brought that exact mower to me yesterday. He had just brought it down from his farm in S Carolina. His son started it and says it runs wide open, just screaming. As soon as he pulled up, I saw the problem. A rat had built a nest under the blower housing, it was so big the strings from the mop head it used were hanging out of the housing. Unfortunately, my friend had tried to correct the problem by pulling the governor spring around the bottom of the air filter housing. The tank was full of water and schmoo. Cleaned out the nest, the tank replaced the air filter and spring, and it lives to be infested again..
I would look for another engine. When i know its bent, i have a somewhat hard time selling it. I would though like to see a bent crank straighten out with a tool.
Not a mechanic here but does the hammer flatten or otherwise damage the bearing when you hit it? I have just found your channel because my mower needs a carb cleaning and I have spent an hour watching your videos. Time for me to get back to it.
Nothing to lose by trying although if you have a good engine from a mower in rough shape i would swap it as that looks pretty much new and keep old engine for parts.
At my shop if a crank is bent i am not allowed to straighten it for contractual reasons with manufacturers and safety/insurance reasons. Crankshafts are made from very hard steel - when bent or deformed they hold that shape like a bent blade (blades are made from spring steel) microfractures (from vibration) can occur and if someone hits an object the crank could break off - i have seen it happen before, i DO have a machine lag-bolted to a steel table that will straighten a bent crank but i don't use it and never will, i mainly use it as an engine test stand. Also NEVER hit a blade adapter with a hammer you intend to reuse - they are made of powdered metal and are extremely soft - alot of times with a bent crank - the blade and adapter are damaged. Also a bent crank will damage an engine if you run it that way - you can never get it 100% straight.
@@INSIDEHOUSEGARAGE personal stuff i would, the machine i have has a dial gauge on it that shows when it's at or near 0°, there is a video of it on my channel from years ago before i turned a hobby into a business.
There's a sleeve. You install it. You use a big hammer. You can use a telescoping magnet pickup tool to indicate a stationary center point. Adjust using hammer to spin truer. There are other videos on the TH-cam. When it has a compound bend, there's a straightening jig that a very large successful shop may have. You can get those sleeves or use a pipe that's several feet long as a lever to bend it back. No it won't shear. No it won't fly out from under. In the event the crank snout could break, it would drop and stop. But, we wear hard shoes when we mow. Don't we? You might, in the event it was possible, step on it. That's about it.
no, if you tip the mower with the carb oil, oil will not make its way to it. If you tip the mower, carb side down, oil will then fill the carb, thru the emissions breather hose.
I have never tried this myself but maybe if you put the blade on upside down, start the mower and run over a large piece of wood (softer than a rock) that might bend the crankshaft back? Hmmm 🤔 lol
well if it,s not too bad a hammer like that is optional but if you want it done spot on the proper way a automotive crankshaft straightening tool or machine might be ideal as lots of small engine shops have them to use for their purpose but yeah it does vary from my view etc.
It would be nice if you told us what cleaner you mentioned in the video and pin it in the comments so we don’t have to read many comments to get to your answer.
The hammer is worth the route It's free and cost absolutely Nothing and it helps fix it a little it's a good tool a mechanic shouldn't be whit out!! Look on ebay for a used crackshaft should be able 15 to 20bucks but I would sale the mower as is... the customer won't know won't hurt em... just don't say anything about the bent crackshaft... start it up in front of them and see if they Noticed but I highly doubt they will.. they will focus on how clean and new the mower looks rather then the vibration...
Just do what you did or use a strong pipe to bend the shaft. Either way it should still be sellable. Hammer should not be more than a 3 pounder or you risk damaging engine bearing and or seals.
A hammer helps. I did it just last week. Another method is a 4' pipe and a helper to hold the mower. All you are trying to do is improve the bent crank, not make it perfect with a dial indicator.
If hammering the crank shaft does the job then by all means…hammer away. I wouldn’t spend the money on a crank shaft for a bare bones lawn mower. Like you said, it’ll run for a few years for the new owners.
No, it's not worth buying a shaft straighting device. It looks like the hammer tricked worked enough to get some money out of the mower. If you really wanted, you could perhaps offer to pay, say, 25% of a harbor freight replacement engine.
I want a few of those "NOT FOR SALE IN CALIFORNIA" stickers to put on all my friends battery powered outdoor power equipment.
As others have mentioned, a length of pipe will work to straighten the crankshaft. I keep several different lengths and diameters as well as using handles off my various floor jacks. Canvas people who work on stainless enclosure frames for boats always have scrap lengths to discard and these are extremely strong in the heavier thicknesses.
yes I'll be sure to do that next time.
Just buy a new one.
Hammering the crankshaft was a good move, and it looks like it really helped. This is a base model, i am guessing 20 years old, so I don't know how much you will sell it for eventually, but it probably won't be in Honda or Toro territory, so you are keeping the parts costs in line with what it might be worth at the end.
I did that bent crank fix on a mower that I had damaged. With the use of a heavy hammer I did get the rest of the season from it. This was 20 or more years ago. It was not perfection, but it did drastically reduce vibration.
thank you Jabo Miles glad to see that mowers been good to you.
I've straightened a couple of crankshafts on lawnmowers using the same method. I like to remove the blade adapter if I can to keep it from getting damaged, and to give me a better surface to strike with the hammer. I'd also give yours another whack or two just to get it as close as possible. Works pretty well though, and definitely helps get the mower usable again for a while longer.
thank you NerfCraft, I'm still working on my swing.
Hit the crank with the hammer! Works good enough... as another famous small engine repair TH-camr always says... "It ain't a space shuttle we are working with here!". Great video, keep 'em coming.
Great point!
5lb sledge hammer and a homemade dial indicator (1/4” threaded rod bolted to a magnet). Sharp square blows directly on the crankshaft exactly where the indicator says the high spot is. Repeat as necessary and with a little patience you can get that shaft damn near perfectly true again. If you keep the blade adapter on there you will divert the hammer energy needed to solve the problem and run the risk of cracking or bending the blade adapter making the vibration problem worse, you’ve got to knock the shaft cleanly and squarely. The crank can be cleaned up and smoothed out with a flap disc or a hand file, believe me I’ve done soooo many of these.
really I appreciate the information
Brilliant. I will remember this.
I've used a large hammer against the blade adapter and it did help. Eventually, I took it to a shop where a friend repairs motorcycles and used a press to straighten out more. It went from being .125" out to about .030" inches out and that made the mower work as needed without undue vibration. Out mower shop in town has a fixture to straighten crankshafts with the engine still assembled but they stopped doing the service because of getting too spooked by garage liability.
that makes sense
Many mower shops have crankshaft Straightener tool like a Stens 751-032 that bolts to the bottom of the engine the main advantage of a tool like this is that it does not put any impact load on the bottom motor casting if crank is realy badly bent its an option to think about. its not a tool any homeowner is going to buy due to its cost . If you are going to try and straighten it with a sledge hammer make a sleeve and weld a washer on the end to protect the shaft, never strike directly on the shaft itself (you hammered on the blade adapter for this very reason) Stens does make a shaft protection sleeve tool designed special for this task 751-065 for 7/8 shaft and 751-081 for 1" shaft with a threaded cap (so you can use a bolt to pop it off when it gets stuck when you are trying remove the sleeve after your repair.. a thanks to Taryl for awareness upon these tools..
thank you Brian Perkins for the information I appreciate it.
It's a shame the crank is bent. I would give this mower to someone who needs one but can't afford one. It will get them by for a couple of years maybe, if they take care of it. I would have hammered on it a bit more, but I am OCD. And no, unless I had a large business, I would not purchase the tool for straightening the crank. The lower crank seal may leak now after the damage, so I would be sure to advise the new owner of it along with the other potential engine problems. Love your videos . I am a subscriber. I always give you a thumbs up. This is a good channel for the diy'er.
thank you Vernon Bruce.
Look at "Steve's small engine saloon", he has a video on how to fix it with a pipe over the crank to bend it back I believe
That would be interesting will need to look at that one, may of been before my time.
A nice fix to keep the vibration down on it some . Always a big fan of those classic engines.
me too, thank you Turningwrenches85
Hammer trick works , my great uncle showed me this trick and I have used this trick a couple of times and got very close too dead one , patience is the key , he always said
thank you Tools of the trade in everyday life.
A Donor engine would be nice, there’s plenty of these engines out there.
In Australia Victa use a 50mm shaft and Masport use a 70mm shaft Honda unknown.
Note in descriptions cleaner not listed nor air filter link, for those needing one.
I use a standard liquid degreaser in a 2L pressure pump which I find works better than spray only.
I think you're on to something
I have an old longer blade adapter I use to hammer cranks. Works perfect. Those old weed eaters make great flips
you got that right, and thanks for the idea.
@@INSIDEHOUSEGARAGE my channel does mainly left for dead scrap mower revivals. Happy to trade subs 😀
I this week picked up a free mower with a briggs quantum motor on it a yardman that the front wheels completely rusted off of. The motor runs great and starts first pull. So I think I'm going to stick it on a new deck I have laying around and sell it this spring.
that's what I would do too.
@@INSIDEHOUSEGARAGE update I did it and it runs and cuts like a champ! Kinda impressed me how good it turned out. The old Briggs quantum motors are great!
A 3 foot length of gas pipe over the shaft would work in a pinch. ;) Taryl Fixes All has one of those shaft straighteners. Pretty slick if you plan on doing a lot of shafts.
thank you Honk Honkler Sr.
@@INSIDEHOUSEGARAGE Back in '78 I watched my pop straighten a rod on a Kawasaki 750 2 stroker with nothing but a block of wood and a c-clamp. That was so old school. Anything is possible when you put your mind to it. Put trust in the Creator. He always has the answer.
Your channel is one of my "calms" in this global "storm" so keep those videos coming!
~Honk~
I appreciate that! thank you Honk Honkler Sr.
Great video!!! I look forward to your videos every week and they have truly helped me with multiple repairs on mowers, blowers and trimmers. BTW, where did you get the round scraper you used to loosen the grass under the deck? I spent about an hour looking for it but so far, no luck. Thanks......
thank you Darris Curry, unfortunately I picked the scraper up, from some free junk, someone was giving away, so I have no idea, where they got it from .
@@INSIDEHOUSEGARAGE thanks...
Can I fix a boot for a sparkplug with wires because I wasn't being careful and I ripped the wires off the spark thing
yes you can.
Another good way is to pull the high side of the crankshaft down with a long pipe I've used it before and it works well.
Good tip!
Rpms seem a little bit low, bend the metal anchor point on the end of the spring, other than that, let it roll. I love that style of engine because they are simple and really durable. I ran one for 2 hours without oil trying to get it to lock up or spin a bearing or chuck a rod. Nothing happened, I took it apart to make sure that everything was in good working order and sold it. That made that style of engine my favorite, just by the durability.
yes it was apparently set that way, to keep the vibration down
I was having the same issue with another lawnmower where it would shake very badly. I wish I knew this trick sooner.
it's not for the faint of heart . it's not everyday, you smack your mower with a hammer.
The way I clean my ATV is I just use a wet microfiber rag with a little bit of dish soap, after that I just use a regular bath towel to dry it all off. It makes the machine look like new without having to buy any treatments.
Good Fix once again!!!
thank you jct300m
Hi mate I been have problems with my lawnmower is back firing throttle arm is really lose how do I fix these problems
can you give me more information about your mower? that way I'll be able to help you better.
It’s running poorly blowing out black smoke. My lawnmower is a 2017 rover dull cut 420
I got one almost perfect with 5 pound hammer. Got rid of almost all the vibration.
nice work!
What website where you using?
thank you Cody's Karts, Craigs and FB marketplace.
This is the same mower I have! But my problem is extremely high rpms from start even adjusting the idle arm and can't figure out what's wrong I'm just gonna get new springs for the carb and see if that fixes it
understandable, good luck Jack Black.
Do you just use normal non 2stroke gas when you’re putting it in the carb
I always use 2 stroke mix, the tiny amount of oil in it, won't hurt a 4 stroke engine. Thank you Thomas Brashears
Slip a deep socket over the crank usually 3/4, 7/8, or 1in/25. Bolt it on then wack away. I personally don't sell mowers with bent cranks, then get parted out. Few days ago i came cross a freebie. Guy hit something so hard that the sump cover broke off.
thank you norge696
do what you have to do i have done it to fix bent steel mower decks while mowing before but no bent crank shafts yet owning a mowing business i might have to soon i would do it
thanks I appreciate that.
I have tried to hammer them straight, with limited success. I have also tried a 6 ft pipe to bend it back, also not a perfect fix. Best way is to find a mower with a shot frame and good engine and swap the engine. You can use the original shroud and gas tank to make it look like the original.
you make a good point. the chances of getting it back straight is very slim.
I have a fs56 stihl weed eater can you tell me what’s wrong it has everything brand new I bought everything what wrong
can you tell me everything you did to it?
Last year, my brother hit a pipe that we never knew was in my mom's back yard and bent the crank on a mower that we had for over thirty years. Not worth the fix. I was going to look online for a newer used mower. I happened to find a usable one a block away from my house and took it. On its maiden voyage a couple of months ago I bent the crank on another pipe! This time I tried to straighten it with a friend. We couldn't find a pipe like others had suggested (and I firmly believe that is the way to go). Instead we removed the blade and adapter and proceeded to hammer it and we did manage to straighten it out significantly. Before fixing it, the mower was really difficult to use because all the shaking make my hands and wrists hurt. After the fix it's not perfect, but it is much better. A couple more whacks would probably make yours better too.
thank you Risetony .
It is definitely worth to straighten it. Even if u were thinking about keeping this mower these Briggs classic motors last forever. I just changed the oil in my dads motor for the first time in 21 years and changed out the carb diaphragm/gasket and now the thing runs like it did new
thank you MotorLegends.
Tim Gross (aka Taryl Dactal) on his TH-cam channel Taryl fixes all has fixed bent crankshafts both ways either using the straightening tool or just by using a lump hammer 🔨.
The engine was smoking because it was tipped in its side & some oil may have got trapped inside the PCV valve then sucked into the carburetor,the spark plug in mine runs the same colour (grey) so the engine is still good.
It was starting to go black,oily and Sooty before I replaced the piston rings almost 3 years ago !
what clear did you use
I never said I used "clear"
Sorry I meant cleaner
oh, it's a degreaser from Harbor Freight.
Eric. It seemed like the hammer helped a lot. I wouldn’t buy a $400 tool. Maybe you can give it a few more tabs and maybe it will be straight again. Keep up the great work.
good point, the hammer will do. thank you Gaming Gang.
You’re welcome.
So what's that cleaner?
LA awesome cleaner
I was recently given. key start self propelled honda that had a pretty gnarly crank on it. I decided its a 250$ mower I might as well throw in a 30$ crank and 1 hours time. runs like a top now.
wow nice work.
Great job. You now have a loaner mower. Or charity.
yes that's a great idea.
@@INSIDEHOUSEGARAGE If you have a veterans chapter, that might work.
Well, unless you are running a mower repair shop and doing a land office business; I'd stick with the hammer solution, especially on a base mower such as this one. Good video.
thank you Lawrence Carroll.
If I saw that lawnmower for sale and you told me about the crankshaft. I’ll do my very best to keep it going a long long time
thank you Alpha Raptor
@@INSIDEHOUSEGARAGE no worries mate
If it’s for experimental use or for my own use, I’d give it a try. However, I’d be very hesitant to sell a mower with a straightened crankshaft. There will be some metal fatigue from the bending back and forth. It might not be much, but I’d rather not risk it.
you make a good point
Can’t hit a crankshaft flat on that side of the big sledgehammer and bend it back if you can figure out which side in which way it’s out of whack
Is the cleaner a Spanish cleaner "la Awesome" LOL 😂 Thanks for another great watch.
lol.. Yes sir
A friend of mine brought that exact mower to me yesterday. He had just brought it down from his farm in
S Carolina. His son started it and says it runs wide open, just screaming. As soon as he pulled up, I saw the problem. A rat had built a nest under the blower housing, it was so big the strings from the mop head it used were hanging out of the housing. Unfortunately, my friend had tried to correct the problem by pulling the governor spring around the bottom of the air filter housing. The tank was full of water and schmoo. Cleaned out the nest, the tank replaced the air filter and spring, and it lives to be infested again..
nice work Jim. it's a good thing it didn't like that for too long.
Someone else on YT has a video using a length of pipe (not tubing) to straighten the crankshaft. Apply pressure in the direction it needs to go.
I've got a different mower that I'm going to try it on, thank you George Mazich.
The hammer is your friend when you have a bent crankshaft and the engine sounds healthy
Thank you Scott Dunn.
Can you tell me the website
answered
I would look for another engine. When i know its bent, i have a somewhat hard time selling it. I would though like to see a bent crank straighten out with a tool.
thank you Christian Larsen.
Tell me the website
Craigs and FB marketplace
Not a mechanic here but does the hammer flatten or otherwise damage the bearing when you hit it? I have just found your channel because my mower needs a carb cleaning and I have spent an hour watching your videos. Time for me to get back to it.
the bottom of the engine is the oil sump, and there's no bearing there. It's more like a bushing and as for damaging, I doubt it.
After that dries, this would be a great place to utilize Amsoil MP Spray to prevent rust.
thank you Keith Dunbar.
If it works out the problem it's great idea
thank you Andrew Johnston.
isn't there a risk of damaging the bottom engine seal with the pounding from the hammer?
not really. the seal will give somewhat.
What’s your favorite website
Craigs and FB Marketplace
I used a large metal pipe for my mower
wow, why did I think of that. thanks of the suggestion Ervin Halili
it is already damaged- what is the difference
you got that right, thank you Army Vet.
Nope, you didn’t include a link for the air filter.
oh you're right, thanks for looking out of me.
INSIDE HOUSE GARAGE Always! 🙏
I've seen another TH-camr. Use a long pipe to bend a crankshaft back though the hammer method works too
thank you for not mentioning the other channel, I appreciate it.
Nothing to lose by trying although if you have a good engine from a mower in rough shape i would swap it as that looks pretty much new and keep old engine for parts.
you got that right.
Hey bro what's up? The mower looks great. Nothing a few blows from a hammer won't solve bro😅😅
thank you Ramadin Sookhoo
@@INSIDEHOUSEGARAGE you're welcome bro
At my shop if a crank is bent i am not allowed to straighten it for contractual reasons with manufacturers and safety/insurance reasons. Crankshafts are made from very hard steel - when bent or deformed they hold that shape like a bent blade (blades are made from spring steel) microfractures (from vibration) can occur and if someone hits an object the crank could break off - i have seen it happen before, i DO have a machine lag-bolted to a steel table that will straighten a bent crank but i don't use it and never will, i mainly use it as an engine test stand. Also NEVER hit a blade adapter with a hammer you intend to reuse - they are made of powdered metal and are extremely soft - alot of times with a bent crank - the blade and adapter are damaged. Also a bent crank will damage an engine if you run it that way - you can never get it 100% straight.
nice, would you ever use to to straighten a crank for your personal engine?
@@INSIDEHOUSEGARAGE personal stuff i would, the machine i have has a dial gauge on it that shows when it's at or near 0°, there is a video of it on my channel from years ago before i turned a hobby into a business.
I would took a bit longer to straighten the crankshaft
I think you're right. thank you Goldrush
The hammer and balance the blade too. .
nice one.
I think that you did the right thing by "semi" fixing the crank. No this mower can be used for a few years and not end up in the dump.
thank you Dee Bee, that's the only thing was hoping for, reduce the vibration, and let it live for a few more years.
I would use a hydraulic press to straighten the crank.
nice choice.
Naaa, scrap piece of metal tubing pry bar, and go to town the opposite direction.. nice little unit though
that sounds like it would work.
Another great video. Heck yeah just take a hammer to it... it is what it is. I've had the tool to strengthen never paid for itself
thank you The Rusty Rooster.
Really like 22" but boy do they sling things every direction. Great for large flat areas but rather flimsy decks lol
I'll agree to that.
There's a sleeve.
You install it.
You use a big hammer.
You can use a telescoping magnet pickup tool to indicate a stationary center point.
Adjust using hammer to spin truer.
There are other videos on the TH-cam.
When it has a compound bend, there's a straightening jig that a very large successful shop may have.
You can get those sleeves or use a pipe that's several feet long as a lever to bend it back.
No it won't shear.
No it won't fly out from under.
In the event the crank snout could break, it would drop and stop.
But, we wear hard shoes when we mow.
Don't we?
You might, in the event it was possible, step on it. That's about it.
thank you Danny Linc.
Another reason why the engine was smoking was probably because when you cleaned the deck underside. Oil must have gotten into the muffler.
no, if you tip the mower with the carb oil, oil will not make its way to it. If you tip the mower, carb side down, oil will then fill the carb, thru the emissions breather hose.
@@INSIDEHOUSEGARAGE I am aware. I am talking about the muffler.
I have never tried this myself but maybe if you put the blade on upside down, start the mower and run over a large piece of wood (softer than a rock) that might bend the crankshaft back? Hmmm 🤔 lol
it might work but I might have to have the engine spinning backwards too.
well if it,s not too bad a hammer like that is optional but if you want it done spot on the proper way a automotive crankshaft straightening tool or machine might be ideal as lots of small engine shops have them to use for their purpose but yeah it does vary from my view etc.
now that's an idea.
@@INSIDEHOUSEGARAGE for sure mate and yep always ideal to invest on etc.
Can you try and work on the John Deere trimmer again I think you can actually save it
hmm.. and how do I fix a bad ignition coil?
@@INSIDEHOUSEGARAGE you have a point could you use a different one off a different trimmer that looks pretty much the same?
You can actually just keep the blade on the crankshaft and pull it. That's how the crankshaft was bent in the first place.
the blade is quite flexible.
It would be nice if you told us what cleaner you mentioned in the video and pin it in the comments so we don’t have to read many comments to get to your answer.
sure thing give me a minute.
I would’ve kept working on it until we get to go to the other way and then Olds by the other way and I’ll be at quality
HAMMERTIME!!!
Relegate that engine to parts and wait for another freebie with a Briggs to swap it over
thank you tez00001
The hammer is worth the route It's free and cost absolutely Nothing and it helps fix it a little it's a good tool a mechanic shouldn't be whit out!! Look on ebay for a used crackshaft should be able 15 to 20bucks but I would sale the mower as is... the customer won't know won't hurt em... just don't say anything about the bent crackshaft... start it up in front of them and see if they Noticed but I highly doubt they will.. they will focus on how clean and new the mower looks rather then the vibration...
I understand JJ Juarez. thanks for your time.
Just do what you did or use a strong pipe to bend the shaft. Either way it should still be sellable. Hammer should not be more than a 3 pounder or you risk damaging engine bearing and or seals.
yes I should have done the pipe method. I'll try it next time.
A hammer helps. I did it just last week. Another method is a 4' pipe and a helper to hold the mower. All you are trying to do is improve the bent crank, not make it perfect with a dial indicator.
thank you Mike Spain.
Good job, I use a piece of oak 2x4 and a large hammer like yours. Thanks
thank you Waterman one
And a parts mower
If hammering the crank shaft does the job then by all means…hammer away. I wouldn’t spend the money on a crank shaft for a bare bones lawn mower. Like you said, it’ll run for a few years for the new owners.
thank you William Snow.
The blade is not balanced correctly that's my thought
thank you Robert Mialhos
@@INSIDEHOUSEGARAGE you are welcome young man 😎👍
3 lb hammer and a 1 in brass pin work on it get it straight!
thank you Paul Boomer
I'd be inclined to dice the engine and find a donor mower with good engine but a bad body. B&S flathead engines are a dime a dozen.
yes they are.
WD40! No Never!
Spend the extra and get a 7 pound hammer. Don’t waste your money on a $400 aligner
thank you sticustom
I use a hammer all the time works great for me
thank you Mike Vessels.
Heat it red hot and then smack it
interesting that's the first time I've heard of that technique.
Dont heat it, the seal will melt and the metal will soften.
Meat & potatoes mower.
I love meat and potatoes.
No, it's not worth buying a shaft straighting device. It looks like the hammer tricked worked enough to get some money out of the mower. If you really wanted, you could perhaps offer to pay, say, 25% of a harbor freight replacement engine.
thank you Covishen.
I say what every work with this mower. Not worth spending 400 dollars on a tool for a mower of this age.
thank you RayFpv.
Yuk, WD 40, no way.
A pipe
thank you Timothy Peterson.
First?
Who cares!!!
@@watermanone7567 I wonder why you don't do this to all the others who does this all the time?
@@ramadinsookhoo6141 Because as Ron White the commedian said "You can't fix stupid" No one cares if somebody is first for last.