How The Auto Choke Works On A Briggs And Stratton Lawnmower Engine

[@johns.5193]

You wouldn't believe how long I searched for a video to describe this apparatus! Fantastic and thank you!

[@machinesnmetal]

I'm really sorry the algorithm difficult to find

[@sesarbela7071]

thank you blessings

[@KThompsonPT]

Fantastic!! Thank you kind sir for sharing!!! I was going mad looking for this answer and lesson. Big time thanks!!

[@jonatanmorel1090]

Ya somos 2.

[@jonatanmorel1090]

@@KThompsonPT No era yo, el únio, entonces. Je, je.

[@TGMForum]

So good to see the operation of the ReadyStart being explained correctly, there's so many people who get this so wrong thinking that the thermal device actually takes the choke off as it warms up, and this isn't the case at all. The thermal device as you correctly pointed out just holds the choke off when the engine is hot. Nice job. 🛠

[@EJK931]

Goodness! You solved a week long headache for me. My dumbass threaded the control arm THRU the therm arm.... watched your video and within 10 min had it all working right again. God Bless youtube mechanics!

[@igotdeelz]

I pickup a mower like this for free and clearly someone messed with it because the control arm was also passed through the therm arm.

[@thejonfedor]

SO interesting! I just replaced the carburetor in my Briggs with the same engine and did a bunch of searches looking for this exact information. Thanks tons for the compact, detail-oriented explanation - I learned a ton!

[@will_cal91]

I have been searching for something to explain what the heck was wrong with my mower for ever! I went a full season without a dang vane spring! This video just saved me so much money!!!

[@machinesnmetal]

Super!

[@victorbertolina6545]

Had the problem where mower would not start without a bit of gas squirted into the carb. The carb was cleaned and appeared to be working properly but I noticed the choke plate was not closed when the motor was cold. I removed the flywheel cover and found a tiny twig had jammed the auto choke lever in the open position. Upon removal of the twig and reassembly, the engine started normally. Thanks for the video!

[@machinesnmetal]

Same thing happened to this one the other day kzbin.info/www/bejne/gouolWWdjLNneaM

[@ThomasMiller-hy8kl]

It may have been three years ago you put this out but my goodness you have helped me out with my lawnmower today July 27, 2024 excellent tutoring about the lawnmower thank you very much. God bless.

[@machinesnmetal]

Yeah these engines with these auto chokes are really starting to give problems lately now that they are 5 years old.

[@radiofhi]

Thanks for a clear and accurate description of the carb spring/auto choke operation on this engine. It helped me troubleshoot and repair my B&S engine. I'm grateful and once again mowing grass!

[@adrisanc]

I found one of these with the bagger 3 houses down, it was ready to be picked up by the garbage man, but I ran over to get it. Took it apart as it looked like they had attempted a repair on it. Went through it and followed this video on how the auto choke worked and found it was not put back correctly. Thank you so much for this informative video!

[@philang.3859]

Thanks…..my craftsman was very hard to start, thought it was the carb, but the thermostat arm wasn’t moving smoothly, blew it out with air and lubed it with dry graphite spray. Works great now, almost junked it!

[@cheaphacks2033]

I have been searching high and low for this video! I have this exact model that I purchased used from a young guy who was tinkering with it. It would run but only have 10 pulls starts then it would die. Then 10 more pulls starts and it would run but at a rough idle. After watching this video I can now see the mower is missing the top spring. 🤦🏻‍♂️ thanks for making this video!

[@francescobarioli4978]

Really well done. Understanding how things are supposed to work is the best approach to fix them.

[@JoHondaRR-YT]

Here we are, one year from the date of this video and your still helping people! Thank you so much, saved me hours of research and solved my issue with my mower.

[@davemellon29]

thanks a lot. I just ran into a issue just like this. I just replaced the carb. and still was starting then stopping. while I had cover off I started mower and pulled the choke lever a little and it stayed running. after a few stops and starts it runs no problem. if happens again ill know what the issue is thanks to you. that thermometer lever might be sticking.

[@AustinandBuddy]

THANK YOU FOR THIS VIDEO! Got a mower for free and had no idea what this was and cannot find part number anywhere so this really helped!

[@blove43]

I had a hard time restarting once it was hot- I replaced the coil --this video was huge bc I had the arm inside the thermostat….yer video showed me it’s on the outside……hours later . 2 min fix!!! Thanks!!!

[@FreemanEdeh]

Excatly the explanation I needed. Also, explaining the 3 different choke systems was helpful, too.

[@machinesnmetal]

thanks friend

[@DS-bi3fz]

this is just enough detail and quick too - I went searching to understand autochoke, found this, have my answer

[@waylangoddard7178]

Been working on an MTD mower with auto-choke. After seeing this video, I know what the issue is with my mower and why it won't stay running. The smaller spring that runs front left-to-right is in the wrong location on the arm. Currently has very little tension on it. Thanks! I figured it was something simple.

[@machinesnmetal]

Excellent 👌

[@tiz444]

Thanks. Just the information I needed for the auto choke device on my mower. Now I can see how it all works together.

[@Phillip-i5q]

I barley started messing with engines and i had lost the spring and couldnt figure out how it was supose to go other than screwing into the carb, thanks for this info video

[@CA-UA]

Very helpful video. In my case, I took everything apart and found a densely packed mouse nest with the occupant jammed into the far end of the lever by the thermostatic thing. It would move toward full throttle but then back off and sputter when it hit Mr. Mouse.

[@LawnMowersThingsThatMakeNoise]

One of the best explanations of the auto choke !!!! Thankyou 🙂

[@danieltaylor9761]

Awesome Vid. Bought mower w/ broken intake (ran when I bought it). When I got home, the duct tape fell off & surging started. New intake took a month to get. I started to put the mower together &...What is this black arm (part of the autochoke) and were does it go.....LOL! You saved me. A million thanks for making this video & also explaining the temp control.

[@paulhellebusch9759]

Thanks a million for the tip on the weighted spring! You made a project that would have been a pain into a 15-minute tweak on a stretched spring.

[@machinesnmetal]

👊

[@edmundmaher2045]

Excellent vid ...thought this was a governer system up to now . Thanks for correcting me on this.

[@shadovanish7435]

This is an example of what I dislike about modern small engine carburetor control designs; complex & unreliable system that wasn't designed for the "real world", & designed by someone who apparently has no concept of "real world" conditions. The older manual choke operating system seems much more robust & reliable, & easier to fix (usually with only minor cleaning). This "removed from reality" design mentality seems to apply to many modern machines.

[@landshark218]

yes and no, its probably the best mower I’ve ever owned. and it uses a spring, tell me whats so complex about that

[@DKSE123]

These choke systems work just fine , and are easy to repair if they don't

[@PerroSucio]

Having said that, these new machines are made for people who don’t know how to work a choke……oh well…….

[@breakdown2878]

@@PerroSucio seems like a waste of an education system if it can't teach you real world lessons

[@philliphall5198]

Got to sale more high dallor parts

[@rhecb]

Thanks, you saved me. The spring had come off and I had to fish it out of the engine with a retractor. Now I know how to put it back together 🙌🏻

[@WhitBoss]

Absolutely brilliant video! 1000 thanks. I forgot to re-hook that spring with the new carb install.

[@maximanino]

man you've saved my life , i thought i had lost a piece putting the carburetor on lol

[@user-rj3xn3eb5f]

Great ... I have this exact engine and am experiencing starting problems ... this sure helps explain what is going on ... Just bought a replacement carb from Amazon ... guess what ... it doesn't have the auto choke butterfly valve ... too late to return ... only has the throttle valve Will try to clean and replace ... but this video is well done and helps a lot Thanks

[@heatherwilhelm9343]

fantastic...after messing with it all day im had to walk away, lol. thx to you i will be at it in the morning :)

[@donwilliams6076]

Thanks for the info l have a 2009 personal pace,automatic chock I’m going to lube the arm bolt from now on after l clean it because l just had that problem in the beginning of this year Thanks again awesome video

[@spring1941]

Thank you for solving my auto choke issue.

[@machinesnmetal]

You are the mechanic now!

[@Chris-ed5zj]

What is the spring size or where can I find it?

[@machinesnmetal]

what is your model - type - code?

[@lzh3131]

This is a very good video. Replaced the vane, lost it. I found your video, Crafts push mower replacing vane spring. Maybe, Craftsman mower won’t start: replace broken or missing vane spring explained. I wish you had shown behind the exhaust, the part you mentioned. Overall very informative. Learned something today! 😊

[@machinesnmetal]

You are the mechanic now!

[@lzh3131]

@@machinesnmetalI’ve rebuilt several carbs on different push mowers, & my dad’s riding mower. This is “new” problem! I really like the tutorial & thanks again. I’m checking out your channel.👍

[@DaveCurtis-b3u]

Thank you so much for posting this video. It was very helpful.

[@wolfgreen162]

Straight and to the point.

[@gdesveaux]

Thanks for this video. My spring fell off of the arm, and I needed to see where it connected.

[@machinesnmetal]

Your welcome 🤗

[@jonatanmorel1090]

Me re gustó, ver ese tipo de consejo. Hace una semana que estoy tratando de entender como trabaja esa cosa llamada termostato. Je, je. MUchísimas gracias por la explicación!!!

[@williamsmythe9291]

thank you for your time in teaching us. it really helped out in the issue i had in my mower

[@blisterphish490]

Thank ou so much. I sorted out the fan part myself but could not piece together what the thermostat was. This video cleared up some lingering questions and will hopefully lead to a better running mower. Many thanks.

[@savoielvis1]

This video requires a new sub 😊. Thx for lesson 🎉

[@machinesnmetal]

Thanks for the sub!

[@TruthShouldMatter]

Exactly what I was looking for!

[@hereiam7701]

Exactly what I needed to see! You saved me from taking out for repair. Thanks so much!!

[@jeffgagne5482]

Great video! I would only add one thing. You may need to stretch a new spring to get the correct tension, so it closes and opens correctly.

[@Mr1forthefun]

Helped me! My spring fell off, now I know what to do thanks!

[@davidkrozy3283]

outstanding presentation!!! My sincere thanks!!!!! Full of troubleshooting GOLD. BLESS YOUR SOUL!!!

[@boblombardi9397]

Well done ...So interesting....Thank you

[@finnharreidsson5862]

That spring was very loose and cause my brand new B&S 450 148cc to sputter all over the place. I tightened it so it was a perfect fit, no tension other than keeping the governor in place properly. Been running like a clock for over 10 years after that. Was not aware it adjusts the choke as well, kinda clever IMO.

[@brianbower7303]

Extremely helpful video. My exact problem at the moment. Thumbs up and subscribed!

[@machinesnmetal]

Glad it helped, you are the mechanic now!

[@803mastiff9]

Mechanical solutions are far more interesting and enduring than electronic solutions. The Bell Telephone Step By Step Telephone Switching System is a great example.

[@kuchb01]

Oh Man! Thank you - my thermostat arm that you talk about was bent. I actually have no idea what I'm doing, I got it apart, but now I'm trying to put it all back together. (fingers-crossed). Cheers... 73 parts left to figure out 😅

[@machinesnmetal]

You are the mechanic now!

[@kuchb01]

@@machinesnmetal Lawnmower Repair kzbin.info/www/bejne/g3epeIekZcp-ptkfeature=shared

[@kuchb01]

@@machinesnmetal thanks again! I had my 8 year old daughter running my camera 😃

[@ArturKSMR]

Thank you! I took my lawnmower apart and could not figure out where it goes until now.

[@robert574]

Man that auto choke is a pain and I was having flooding problems each time I went to start it. I removed my vane and went back to a manual choke carb and bought a used bracket with the choke lever. I live in FL and it starts every pull now (never needs to be choked).

[@machinesnmetal]

You! are the mechanic now

[@Bada_Bing13]

Thanks for that video. I Picked up an pressure washer with a 14yr old briggs w/auto choke and it didnt look right. I see owner f'ed with it and replaced all the springs in all the wrong spots lol It still had the same briggs plug in it they put in when it was built 😂 and carb was old coagulated gas & Vaseline.

[@taffydavenport1965]

You just imparted me with SO MUCH USEFUL INFORMATION. Thank You so very, very much !

[@clarencemorrissey8035]

Thanks just fixed. My mower, Thanks to you!!!

[@robertreese8044]

Thank God u did this I’ve been looking for a video explaining this..thank u sir!!!

[@afzaalkhan.m]

Excellent tip Thank you

[@MrMaurytoYou]

Excellent video sir. Showed me exactly what I needed to know to fix my mower.

[@mobmob5944]

Perfect explanation. I came for the spring question but got more knowledge

[@keithr5638]

Great video and explanation. It's frustrating that the manufacturers decide to take away the manual choke and replace it with something much more complex, which introduces many more things that can fail and increases the difficulty in troubleshooting (all in the name of convenience of not having to manually push a choke lever). A case of "don't fix/change it if it's not broke."

[@machinesnmetal]

The manufacturers have no choice, the government's force emissions compliance on them and manual chokes pollute too much. It's the main reason Honda dropped out of the lawnmower game this season.

[@keithr5638]

@@machinesnmetal Thanks for the info. Why am I not surprised.

[@MarshallBros]

This is pretty helpful looks exactly the same to the mower I’m tearing apart trying to get the choke to disengage now I just need to get the covers off all around it to get to that lever 😂

[@Channel-nq7eo]

mower was revving high for last few yards. it stopped running yesterday. cleaned carburetor today. could not see tell if anything wrong with choke. mower started and is running but revving terribly. later found a small part that I guess fell off when I was fixing it. about the size of a penny with a little hole in it and indentions. is this my revving problem? is it connected with choke? no way to upload a photo of it, but a little smaller and thinner than a penny and made of metal.

[@w2msa]

Thank you for the explanation. Is there anyway to slow down the speed of the front wheel drive, my father-in-law can’t walk that fast.

[@machinesnmetal]

Probably what brand model number and serial number is your machine?

[@paulpatt5481]

Thanks for the great video . The pivot screw and the air vane are frozed on my mower. Not sure about the thermostat and will need to check it with heat gun. Depending what I find after getting the shround off, I may just change carb and air filter housing to a primer bulb system .

[@machinesnmetal]

It's common for the vane to get tight on its pivot screw. Take apart and buff it put a drop of tri-flow and good for another 5years

[@Thomas-ce4mh]

My mower will not stay on unless I force position the choke closed. Would you have any insight into this scenario?

[@machinesnmetal]

Try giving your carburetor main jet a good cleaning

[@timmcallister5763]

Just the video I’ve been looking for. Thanks

[@rickbales1880]

Thanks for this video.Found out where I was going wrong. Won't say, feel stupid enough.

[@da324]

I recently was given a 2012 Husqvarna HU775 that had been stored in a climate controlled storage unit for 12 years that was used twice when purchased. It has the lever for starting, fast, slow, and stop positions on the left rail. I cleaned out the gas tank, carb bowl, carb jets, and put in new oil. It fired right up and runs, but not at full rpm though. I found a cracked breather tube and replaced that, but I have the same issue. I'm not sure if it's the throttle control cable, governor, springs, but it's got to be a simple adjustment. Any ideas? Thanks!

[@machinesnmetal]

add some tension to the throttle cable

[@raresr4092]

Had a question about the choke. When the Briggs engine is warm/hot from running for a bit, when you shut it down will the choke remain open unto the engine cools down ,The once cooled down go back to the choke position?? The reason im asking is when mine was warm or hot from running for 10 mins or so will that choke stay in the open position unto the engine cools down after a half an hour or so? Please let me know would really appreciate it trying to make sure everything is in working order.

[@machinesnmetal]

Did you watch the video?

[@fred5149]

Great information and informative..thank you sir

[@machinesnmetal]

My pleasure

[@egg_ox]

This was exactly what I was looking for

[@rebeccaestelle288]

my boys are learning from ya!! Excellent!!

[@brucebain7490]

Good video. My mower will not start when hot because the thermostat has the choke open. Anything I can do but have a coffee while it cools down and finish mowing the lawn?

[@machinesnmetal]

The thermostat is supposed to keep the choke open when the engine is hot if it won't start when it's hot there's probably dirt in the carburetor preventing enough fuel getting through the main jet when the choke is in the off position.

[@Mythendor]

Love the Pro-Tips man thanks a bunch!!

[@machinesnmetal]

👊

[@willwork2fish261]

Thank you for the video that, clears up a lot for me. Question though, mine has been surging and I’m thinking it’s got to do with this. Where can I find the right spring for these carbs, cuz the ones on Amazon aren’t strong enough tension I presume

[@machinesnmetal]

A surge is usually a dirty mainjet. You can use your model-type-code to lookup the correct spring for your engine on any Briggs online parts lookup. Then I recommend you buy an OEM spring off eBay.

[@willwork2fish261]

@@machinesnmetal so I’ve changed the Carb and cleaned the original one 2 times, I changed the spark plug, gas, air filter, gaskets, sprayed all around the hoses and exhaust for air leaks… I’m completely lost

[@machinesnmetal]

when did the problem begin?

[@willwork2fish261]

@@machinesnmetal I got it in a trade and it was all messed up

[@scotta9114]

Great concise video. One of the best informative videos that doesn't take forever to view. So My Gold Series Briggs L-Head engine starts perfectly - Choke closed. But when the engine is up to operating temperature, Choke is fully open and it will not start. Any advise on fixing it? I tried to clean the carburetor but the problem persists. Wondering it there is a way to have it a half-choke when hot? Or some issue with carburetor? Thanks for any advise someone here may be able to provide.

[@machinesnmetal]

Did you check the flywheel key?

[@scotta9114]

@@machinesnmetal I have not checked the key. It runs so good as long as I don't have to shut off to empty the bag. Like she is too lean to start when hot. I'll look at key for flywheel. Thanks!

[@machinesnmetal]

They tend to rich up a bit when you stop the motor as it continues to suck in air/fuel after you let go of the bar and the spark is cut from the equation. Sometimes if you don't wait a few minutes before starting it's a 5 pull start because the chamber is too rich with fuel. I think in the motor manual it even says to wait 3 mins after a shut down to allow the rich to thin out sometimes it's referred to as a flood. Check that flywheel key, could be your problem.

[@PatrickMcColley]

@@machinesnmetal I'm having the same issue auto choke is working properly but when the engine is hot and choke open it will not start, not even a hint of ignition. I hold the choke closed and it will fire so I immediately open the choke and it continues to run. So tempted after 3 years of this and no one can solve the issue to install a manual choke. And my flywheel key is good.

[@paulpelosi7808]

Excellent information!! Thanks so much

[@machinesnmetal]

Glad it was helpful!

[@dennisrphymurphy7929]

Amazing info. Thank you

[@machinesnmetal]

Glad you enjoyed it!

[@matthewmiddleton63]

Great video. Mine has the exact setup by after running for about three-five minutes it just dies. I've pulled out everything with the fuel . Any ideas?

[@machinesnmetal]

Try loosening the gas cap when it dies

[@motomaxsandiego]

If gas cap doesn't help, I hear that the coil might be going bad when hot ??

[@tevman69]

Great video, thanks!

[@machinesnmetal]

Glad you liked it! I'm glad it was helpful

[@mickbrown815]

Good explanation of the choke mechanism. Question my craftsman Briggs engine looks just like your toro one. It starts and then it stops i changed out the oil, spark plug, gas, air filter and cleaned the fuel lines. It’s still not working. I’m thinking maybe it’s the thermostat but not sure? Any suggestions? Also I noticed when I get it started and pull the mower up by pushing down the handle down and it seems like it wants to run longer but once I lower it stops. I have it since 2013 without issues until recently. Also I noticed that the carb seems to be leaking too just noticed that today after I assembled everything back unless a hose is not tight? I’ll have to check it out once I get back from home.

[@machinesnmetal]

Clean out your carburetor bowl and main jet

[@mickbrown815]

@@machinesnmetal I’m going to undo the carb right now

[@mickbrown815]

@@machinesnmetal coil is completely dead. Ordered one, some additional minor parts

[@mickbrown815]

@@machinesnmetal my machine is back up and running at 100% 👍 I probably needed to do this along time ago. Oil changed, filter changed, new plug, new thermostat, new carburetor and running like new. I think it was a combo of carburetor, thermostat. Seeing it’s running great now. I bought a new coil just in case but didn’t need it after all.

[@VaJamie]

I have a B/S 125K02-0389-E1 . I cannot find that spring anywhere that remotely looks like the one in your video. The ones I've seems so short compared to yours. Any help by any chance to find the correct spring?

[@machinesnmetal]

790849

[@VaJamie]

@@machinesnmetal Thank you sir. 3 yrs from the original video and you still find the time to folks. So appreciated. Got one ordered from that jungle store.

[@robertheitman4720]

Can u show a picture of were the lo hi bent wire goes also the governor spring wire

[@Jake-st5mm]

Really good explanation.

[@bijanghahramani7887]

Excellent knowledge to learn Auto Choke

[@machinesnmetal]

Thanks!

[@firas399]

Hi ,I got same one it started easy but when it's hot doesn't started unless get cold again or to push back the chock I mean the arm, can u tell me what the problem, thanks

[@machinesnmetal]

Maybe the spring is missing. Make a video so I can see

[@Colt3854]

Use to love the old on/off choke switch. This is the new so called improved version. A lot more complicated with more problems. Why i ask.

[@machinesnmetal]

Emissions requirements. California dosent want people running their machines on choke.

[@craigrupar3367]

awesome video saved me a whole lot of trouble. Thanks

[@judisinger3693]

I have this engine on mower I'm working on! Spring was missing on arm which I have replaced. Waiting for more parts before I try to start it. The other mower I'm trying to keep out of junk heap is a Zstart Craftsman with no prime bubble and Fresh start pods. After installing new carb and throttle cable, it won't start because choke doesn't close. The cable I replaced is obsolete and the one Craftsman says is replacement had spring on end instead of dogleg. The one I ordered is shorter but it operates choke lever properly, pulls it all the way back. Mower won't start with rope without start fluid because choke is not closing. Is there an adjustment I need to do? Once started with fluid, it runs perfect! Having trouble finding Fresh start pods, too. Help!!!!!

[@machinesnmetal]

Maybe just get a primer style carb from the scrapyard and change over from choke cable setup to a primer setup. Problem solved. The mower scrap yard should know where to get the pods, I found them at Powersource Canada on anacis island.

[@judisinger3693]

Thanks for your reply. I think my terminology was confusing. There is nothing connecting the mechanism that closes the butterfly in carb when I engage brake handle to start. Should there be a spring or something connecting the two mechanisms to close butterfly in carb or does it somehow work off off some kind of vacumn. The Air vane on the other mower I'm working on keeps butterfly closed and then opens it up when it's running and has thermostat to regulate. Total different technology. There is nothing that moves the mechanism to close the butterfly unless it's done thru air filter or it needs to be connected with spring or something. No one seems to know???? BS engine# 125K-0658-E1

[@machinesnmetal]

I looked up your engine number on ereplacement parts.com and it shows that engine came with a primer, manual, and autochoke system. It would be best to hit the scrapyard and get the primer parts and make yours use a primer.

[@judisinger3693]

@@machinesnmetal This machine does have a primer, but the fact that the butterfly is open initially is why it won't start. I found video that showed how to adjust pin in govenor that goes into motor under gas tank? Will this adjustment make it so butterfly is closed initially and then somehow open while running? My other machine has the Air vane system and butterfly is closed initially and then opens while running from air off flywheel. No one can seem to figure out how to get butterfly closed so it will start. YT video says anytime carb is changed, this pin needs to be adjusted? There has never been a manual choke. I bought machine new and it never had starting issues. This new carb is first new one ever put on it. Guess I'll try adjustment, but need to get right size socket! Video says 3/16" but thatcwas big. 4mm fits but mine is not deep enough. Will look up video to reference. Won' t let me paste it here.

[@machinesnmetal]

if it has a primer then regardless if the butterfly is open or closed when you prime it a shot of fuel will come up out of the gold pipe in the middle of the carburetor and it will prime the engine to start. Alot of the time the gasket in between the air cleaner box and carburetor is not tight enough for the prime pressure to make it from the bubble through the back of the air cleaner and into the small port on the mouth of the carburetor, if you double the gasket and don't tighten the airbox backing too tight is usually works.

[@totalpaddleboard]

Awesome video and information, thanks for posting. Do you have the same sort of video for the governor on this same Briggs motor??

[@Anthony_The_Disney_Guy]

For some reason my flap/arm was stuck in the closed position on my 20 year old Snapper, not allowing the mower to rev up. I took the cover off and pushed it open, and sprayed some lube on the moving parts. All is fine now.

[@jgfunk]

Edit: first, thanks for the video! Issue: I have same lawnmower. Ran it without issues 2 weeks ago. Filled it with gas yesterday and it doesn't run well. It sounds "labored" and won't even run in "mow mode". I emptied the tank and filled with brand new gas. Didn't help. Tried carburetor spray, didn't help. Cleaned the air filter too. None of these efforts improved the motor running. Still sounds like it's struggling... Should I replace carburetor?

[@machinesnmetal]

Take your carb off and clean it out

[@jgfunk]

@@machinesnmetal thanks for responding! I'm going to try that

[@Saurous3098]

Just what I was looking for. ..thanks

[@machinesnmetal]

🙏

[@mickbrown815]

Excellent breakdown and video!! 🙌👏🏻👏🏻👏🏻👍

[@machinesnmetal]

👊

[@mickbrown815]

@@machinesnmetal well I installed the new thermostat and still doesn’t want to get start or stay on? Damn. 😩 any suggestions?

[@SwampyOgre425]

I couldn’t get the autochoke linkage reconnected so I just skipped it. Mower runs fine. I’m assuming if I just didn’t hook it up it’s not choking at all? So if I can get it to run then I’m good? I tried forever to get that linkage set but it doesn’t seem compatible with the new carb

[@machinesnmetal]

If it works, don't fix it

[@carlodonnell146]

I thought that the automatic choke is activated with the exhaust and a thermo switch that opens and closes the choke when the engine is hot or cold; and what you are describing there is the governor; my old lawn more has that fan operated lever and it does not have an automatic choke.... my new lawnmower has an automatic choke, but I havn't had any reason to remove the covers as yet.

[@machinesnmetal]

These models use both, it was briggs's last attempt at meeting emission standards with the L head engine. The governor for these engines is located underneath the flywheel. after this engine they went to the E-Series OHV motors.

[@romanorsagh708]

Hi. I repair lawnmowers. I have a lawnmower with the same carburetor that you have for repair. I cleaned the carburetor and engine compression gauge 2.8bar - 40psi briggs stratton 825 I/C. The engine starts cold, but after a while the revs start to fluctuate. The automatic choke is fine. I haven't found out what could be the cause yet.

[@machinesnmetal]

40 seems low. Put some 20w50 in it and try the compression test again