Thank you! you just saved me hundreds of dollars. My cousin blew two lawnmower in two days cutting his grass. I will never let him use it again! Thank you thank you!!!! Thank you!!!
I work on these annoying things a lot and this is a pretty decent video. One thing to remember though. Before doing the tap & pry trick to remove the flywheel. Make sure the shaft tip is flush with the top of the nut. Then use a dead blow hammer if possible. With things being made so cheap these days. It don't take much to mushroom the shaft tip!
thank you perfectly explained for me. i glad i didn't over react when i hit a piece of brick. i went straight in the house, explained what i did and you video came up #2, but i picked yours. thanks again, i know u saved me and i haven't even fixed it yet. lol keep helping!
So helpful. I had seen a video of the use of a special device used to to lift the flywheel off the crankshaft, but understanding it sits on a conical spigot and can be gently knocked free allowed me to figure out how to fix my Hyundai - now i just need to find a replacement key! thank you
You are a F..king genius! Luv Ya Man! 😃 I just bought a used Lawn Boy and tested it out, what a beast! I'm a short fat bastard and it was a little hard to keep up with the mower(self propelled) cause it runs so fast. I was impressed and polished it up when I was finished. Today, feeling like Superman, I decided to cut in an area not suited for the Lawn Boy and hit a large old tin can and killed the motor immediately. I couldn't get it started(when before 1 pull was all it took) I was so pissed at myself for "pushing" the mower like that. Then I carefully watched your video? And Poof! the starting problem with my mower vanished like a fart in the wind! Thanks Bro You Rock! 👊
@@Buckwsr thanks for the response I had the engine apart and there isn't one bur I also don't see any reason why I am not getting any spark; the armature key is not sheared, the camshaft looks fine , I still have a no start. the compression seems very low at 45psi but that is no reason not to have spark .THE ONLY THING I HAVE NOT LOOKED AT ARE THE RINGS ,BUT I think maybe there are worn out, the mower is 10 yrs. THE BLADE STRUCK SOMETHING AND IT STOPPED AND NEVER RESTARTED , I'm missing something obviously but what else? The coil is new !!! ANY IDEAS by the way my full caes letters are only for ease of reading I'm not mad and shouting I like to write like that.
thanks for the informative video. Wouldn't you disconnect the spark plug wire before beginning work on the flywheel? How tight does the nut need to be?
I guess, in the interest of safety, removing the spark plug wire would be a fine idea. Nonetheless, there's really zero chance that the mower is going to start up accidentally during this procedure. And I'm sure somewhere Briggs & Stratton has a torque specification for the flywheel nut, but I think "good and tight" will be all that is needed. Good luck with your mower!
I've got a riding mower with Briggs and Stratton 21hp engine and I got from a friend they hit a stump and broke the pully that holds the blades and I fixed all that and it worked fine amazingly and then this yr I go to get it jumped off for spring and mowed my front and side then started the back and forgot the water hose was out and ran over UT but it didn't get all hung up or wrapped up in it. The blades cut the hose but it sputtered then died now won't crank back up. Turns over but not firing. I put new plug, new oil, and new fuel filter but nothing. Just turns over but won't fire. I didn't hear any weird noises or any sounds that anything broke. I don't know if maybe it already almost messed up from them breaking that pully that held blade even though it ran fine all summer just can't keep new battery charged for some reason but I'm more worried about the engine and if maybe hitting the hose was just enough to to finish the key or pin off. If you have any information at all that would help me I'd greatly appreciate it! Thanks
This happens more often to push mowers than to riders, but it would still be worth removing the engine shroud and fan, and take off the flywheel nut to see it things are misaligned. If so, that is your problem. Good luck
Make sure to check it anyway and replace it if need be. Mine had this problem forever and just today I figured out about this. Mine wasn’t completely sheared but it was broken enough for the engine to recognize it. Once I pulled it I saw where it was broke. Replaced it and I swear to fuck this mower started on the first rip. I was so happy holy shit 😅😂
I am trying to unscrew the nut, and it’s so tight that it’s rotating the flywheel. I’ve tried using a different tool to hold the flywheel in place, but it started cracking one of the grooves. Any advice for how to loosen the nut?
yeah, they can be stubborn. Borrow or buy an impact wrench....a useful tool to have....and that should do it for you. Alternately, you could immobilize the engine by using a block of wood underneath the mower to keep the blade from spinning. Good luck.
I followed your instructions step by step. Everything worked great until I went to pull starter. The flywheel will barely move. It is acting like it is stuck. How would I troubleshoot?
Hey. Can someone tell me what I'm doing wrong? I followed this guys video, got the old key, out new key in, put it all together, fired right up BUT it then started SMOKING super badly... What is causing this?? Thanks. I just drained the old oil, tomorrow I'm putting in new oil, but that shouldn't be the cause because before it broke down, it has the very same old oil in it and it wasn't smoking at all. Any help is appreciated!!
You probably got some oil in the muffler from when you tipped the mower on its side to check out the damage. Move the mower to a corner of the yard, and start it up. Walk away and let it run for a few minutes, and see if that smoking clears up. I bet that's all you need to do.
@@Buckwsr I did see it was way over filled with oil, but the weird thing is, it was way over filled with oil BEFORE I ran over the root in the yard which made me replace the flywheel key. So I'm not sure why it would smoke AFTER the fact when before it didn't? I'm going to check the air filter and see if oil is in there too.
@@loislane4583 Like I said, you probably had the mower on its side at some point. That, plus being over-filled, is why oil made its way to the muffler. Again, give it a few minutes to burn off. Let me know how it works out!
So i hit a big rock with my lawn mower, my mower will still start but the lawn mower is very loud now. Any suggestions to what could be wrong with my walking mower???
I see some of these keys are called 'Woodruff' keys - which seem to be semicircular, and that's certainly the shape of the one from the Hyundai lawnmower engine
Do you mean Honda? I've never heard of a Hyundai lawn mower engine....Of course, in 1989 I bought a Hyundai Excel, and it pretty much had a lawn mower engine under the hood! Ha Ha....
@@Buckwsr Same thing happened here. On two identical craftsman models on the same day. Start rope kicked back on both after the hit. One stump, one rope. Thank you for saving us some head scratching getting strait to the culprit of the situation. Saved us a day of going through the motions. Thank you sir!
@@corrydriscoll6920 It is quite an uncomfortable feeling when the mower jerks that starter rope out of your hand, and sometimes painful. But that is the tell-tale sign of a mis-aligned flywheel. Good luck on the repair....really not that hard to do.
Get flywheel keys here: amzn.to/3VrRU5b
5 years late to the party, but this helped me out immensely, thank you!
Thank you! you just saved me hundreds of dollars. My cousin blew two lawnmower in two days cutting his grass. I will never let him use it again! Thank you thank you!!!! Thank you!!!
I kno it’s old but no way everyone saved you hundreds of dollars 😂..how each vid saved you help me save too
5 years later and you saved me. Thank you!
Awesome job buck. Hey remember its A flywheel key block pin replacement insert from Briggs And Stratton company.
Yessir
It’s exactly what happened to mine and I would have never known without your video. Thank you and I appreciate it. God Bless You!
Good job getting it done yourself!
Thank you so much! You helped me save so much money on my mower!
That's great news! And good job fixing it yourself!
I work on these annoying things a lot and this is a pretty decent video. One thing to remember though. Before doing the tap & pry trick to remove the flywheel. Make sure the shaft tip is flush with the top of the nut. Then use a dead blow hammer if possible. With things being made so cheap these days. It don't take much to mushroom the shaft tip!
Thank you. So glad I earned a "pretty decent" score from you. Your advice to take care not to ruin the shaft is a pretty decent idea. Thanks.
thank you perfectly explained for me. i glad i didn't over react when i hit a piece of brick. i went straight in the house, explained what i did and you video came up #2, but i picked yours. thanks again, i know u saved me and i haven't even fixed it yet. lol keep helping!
Thanks so much. Please let me know how you make out with the repair.
Thank you so much for the video. You explained very well each step. Makes me feel good that I can take care of some things I own.
Good luck with the repair. I just did this same repair on a mower yesterday. 20 minutes later, and it started on the first pull!
I diagnosed my lawnmower just like you described and fixed it as well. Thank you very much.
Good job! Glad you were able to do it yourself.
So helpful. I had seen a video of the use of a special device used to to lift the flywheel off the crankshaft, but understanding it sits on a conical spigot and can be gently knocked free allowed me to figure out how to fix my Hyundai - now i just need to find a replacement key! thank you
Very helpful. Just hit a hidden rock on my 42” Poulan. Looks like same problem. Thanks.
Fixed my Briggs Stratton thanks to this video 🙏🏼
Great job, Sergio. Glad you got the job done!
Caterpillar makes a cameo on the left at 5:56 :)
I take that back, you posted 11m ago thank you, I'll try that with my lawnmower, cause it hit a brick.
You are a F..king genius! Luv Ya Man! 😃 I just bought a used Lawn Boy and tested it out, what a beast! I'm a short fat bastard and it was a little hard to keep up with the mower(self propelled) cause it runs so fast. I was impressed and polished it up when I was finished. Today, feeling like Superman, I decided to cut in an area not suited for the Lawn Boy and hit a large old tin can and killed the motor immediately. I couldn't get it started(when before 1 pull was all it took) I was so pissed at myself for "pushing" the mower like that. Then I carefully watched your video? And Poof! the starting problem with my mower vanished like a fart in the wind! Thanks Bro You Rock! 👊
Feels great fixing it yourself, doesn't it? Good job!
Yes it does! But I had a lot help from Mr. Buck 🙂
Thank you for this video ~ after watching it even *I* might be able to make this repair!
I'm sure you can do it!
Get flywheel keys here: amzn.to/2Q1dYAK
Thank you sir!
Shoot the link doesn’t work anymore. Can you redo it?
@@sresari Thanks for the heads up. Link has been updated. Try this: amzn.to/3VrRU5b
Very helpful, thank you!
Thank you - this was helpful!
Thank u so much just fixed my mower😅
Great job!
Thank you very much sir for posting this!!!!!!
Great video, I just wish you've mentioned, where you got that pin to hold the flywheel.
Opened mine up, pin looks to be aligned still. Hum.. any ideas on next troubleshooting step? 🙏 thanks
Thank you very much very helpful
The flywheel keys can be had at local NAPA or local Auto parts store too. Should be cheap.
Good tip. Thank you.
do all lawnmowers have a oil low cut out switch, I can't find one yet on this Briggs/stratton engine.
I've never seen a low oil cutout switch on a push mower. And only once in a while on riding mowers.
@@Buckwsr thanks for the response I had the engine apart and there isn't one bur I also don't see any reason why I am not getting any spark; the armature key is not sheared, the camshaft looks fine , I still have a no start. the compression seems very low at 45psi but that is no reason not to have spark .THE ONLY THING I HAVE NOT LOOKED AT ARE THE RINGS ,BUT I think maybe there are worn out, the mower is 10 yrs. THE BLADE STRUCK SOMETHING AND IT STOPPED AND NEVER RESTARTED , I'm missing something obviously but what else? The coil is new !!! ANY IDEAS by the way my full caes letters are only for ease of reading I'm not mad and shouting I like to write like that.
Where do you get the new pin???
What if the pin is not sheared but still a no start after hitting an object?
Keep those videos rolling either way though man. Are you still down south now days man? If so take care down there.
thanks for the informative video. Wouldn't you disconnect the spark plug wire before beginning work on the flywheel? How tight does the nut need to be?
I guess, in the interest of safety, removing the spark plug wire would be a fine idea. Nonetheless, there's really zero chance that the mower is going to start up accidentally during this procedure. And I'm sure somewhere Briggs & Stratton has a torque specification for the flywheel nut, but I think "good and tight" will be all that is needed. Good luck with your mower!
I've got a riding mower with Briggs and Stratton 21hp engine and I got from a friend they hit a stump and broke the pully that holds the blades and I fixed all that and it worked fine amazingly and then this yr I go to get it jumped off for spring and mowed my front and side then started the back and forgot the water hose was out and ran over UT but it didn't get all hung up or wrapped up in it. The blades cut the hose but it sputtered then died now won't crank back up. Turns over but not firing. I put new plug, new oil, and new fuel filter but nothing. Just turns over but won't fire. I didn't hear any weird noises or any sounds that anything broke. I don't know if maybe it already almost messed up from them breaking that pully that held blade even though it ran fine all summer just can't keep new battery charged for some reason but I'm more worried about the engine and if maybe hitting the hose was just enough to to finish the key or pin off. If you have any information at all that would help me I'd greatly appreciate it! Thanks
This happens more often to push mowers than to riders, but it would still be worth removing the engine shroud and fan, and take off the flywheel nut to see it things are misaligned. If so, that is your problem. Good luck
My original flywheel key hasn't moved after hitting rock. Could it be something else.
Make sure to check it anyway and replace it if need be. Mine had this problem forever and just today I figured out about this. Mine wasn’t completely sheared but it was broken enough for the engine to recognize it. Once I pulled it I saw where it was broke. Replaced it and I swear to fuck this mower started on the first rip. I was so happy holy shit 😅😂
I am trying to unscrew the nut, and it’s so tight that it’s rotating the flywheel. I’ve tried using a different tool to hold the flywheel in place, but it started cracking one of the grooves. Any advice for how to loosen the nut?
yeah, they can be stubborn. Borrow or buy an impact wrench....a useful tool to have....and that should do it for you. Alternately, you could immobilize the engine by using a block of wood underneath the mower to keep the blade from spinning. Good luck.
I followed your instructions step by step. Everything worked great until I went to pull starter. The flywheel will barely move. It is acting like it is stuck. How would I troubleshoot?
I'm wondering about possible internal engine damage.....?
Where can you get that pin??
Tyler, see the video description for a link to buy the flywheel sheer pin. Thanks.
Hey. Can someone tell me what I'm doing wrong? I followed this guys video, got the old key, out new key in, put it all together, fired right up BUT it then started SMOKING super badly... What is causing this?? Thanks. I just drained the old oil, tomorrow I'm putting in new oil, but that shouldn't be the cause because before it broke down, it has the very same old oil in it and it wasn't smoking at all. Any help is appreciated!!
You probably got some oil in the muffler from when you tipped the mower on its side to check out the damage. Move the mower to a corner of the yard, and start it up. Walk away and let it run for a few minutes, and see if that smoking clears up. I bet that's all you need to do.
@@Buckwsr I did see it was way over filled with oil, but the weird thing is, it was way over filled with oil BEFORE I ran over the root in the yard which made me replace the flywheel key. So I'm not sure why it would smoke AFTER the fact when before it didn't? I'm going to check the air filter and see if oil is in there too.
@@loislane4583 Like I said, you probably had the mower on its side at some point. That, plus being over-filled, is why oil made its way to the muffler. Again, give it a few minutes to burn off. Let me know how it works out!
@@loislane4583 P.S. I'm not Superman. I'm just speaking from experience....
@@Buckwsr You might not be Superman, but I could for sure see some Clark Kent in there somewhere. Ill keep you posted. 😁
Those chickens 😂
Q bonito
So i hit a big rock with my lawn mower, my mower will still start but the lawn mower is very loud now. Any suggestions to what could be wrong with my walking mower???
Is the muffler loose?
I see some of these keys are called 'Woodruff' keys - which seem to be semicircular, and that's certainly the shape of the one from the Hyundai lawnmower engine
Do you mean Honda? I've never heard of a Hyundai lawn mower engine....Of course, in 1989 I bought a Hyundai Excel, and it pretty much had a lawn mower engine under the hood! Ha Ha....
I know how you feel. Mine had an emergency function in a no start. Pedals would drop down and away you go.
Great!!!
Mine was broken changed it. Yet it won't crank. Any ideas?
I need more info....what was broken? What did you change?
Gimped the lawnmower on some rope. Gonna take it apart tomorrow if I can and see if this was the culprit.
Rope would be less of a sudden jolt, but I'm sure it's still possible for that to cause a mis-aligned flywheel. Good luck.
@@Buckwsr Same thing happened here. On two identical craftsman models on the same day. Start rope kicked back on both after the hit. One stump, one rope. Thank you for saving us some head scratching getting strait to the culprit of the situation. Saved us a day of going through the motions. Thank you sir!
@@corrydriscoll6920 It is quite an uncomfortable feeling when the mower jerks that starter rope out of your hand, and sometimes painful. But that is the tell-tale sign of a mis-aligned flywheel. Good luck on the repair....really not that hard to do.
You need check the pull cover …
Was just cutting the grass and hit a rock and the engine wouldn’t start. This seems like the most common thing that happened after u hit something.
I hit a water nozzle. Now mower won't crank. The string Wont move
Briggs and Stratton is total crap!