How to Replace Diaphragm and Gasket on Briggs and Stratton Engine Primer Carburetor

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  • Опубліковано 30 січ 2025

КОМЕНТАРІ • 241

  • @carldelancey5026
    @carldelancey5026 2 роки тому +7

    Thank you for this very clear & helpful video. I am a 67 year old female retiree & was able to repair my 98 year old mother's serging mower myself!!! Thank you, thank you!
    Lighthouse Lady

  • @tonysuffolk4651
    @tonysuffolk4651 9 років тому +13

    Hi. A big thank you. I was about to scrap my old mower but thought it worth £2 to try a new gasket and diaphragm. When I followed your excellent instructions I found the diaphragm was perforated. Now my old mower runs perfectly and you have saved me a lot of money. Thank you for bothering to share your expertise.

  • @johnhaine3222
    @johnhaine3222 7 років тому +1

    Did the trick! My mower had a new carb fitted last year by the "service agent" - about 3 weeks and 4 cuts ago it stopped working properly. They'd made a mess of the gasket and diaphragm when fitting - followed your clear instructions, mower immediately sprang into life sounding healthy again. Thanks!

  • @Gr8Layks
    @Gr8Layks 7 років тому

    There are a lot of videos re: the B&S carb diaphragm. Yours is definitely the best one! Nice work. Thanks for uploading.

    • @jonsherar4911
      @jonsherar4911 6 років тому

      Great video! I bought a new carburetor for my Briggs and Stratton, had trouble with it running for about 2 minutes and then stalling out. After watching this video I checked the gasket and diaphragm, I had installed them backwards, reinstalled them and problem solved! Thank you!

  • @ecanem1964
    @ecanem1964 9 років тому

    Just did all this....didn`t have new parts but I cleaned everything, used a little silicone, blew everything out with air, and everything worked fine...just needed one more cut before winter....now I know how to fix, I will replace with new parts in the spring...thanks great vid M8.

  • @elisalivingkingdomlife8549
    @elisalivingkingdomlife8549 9 років тому +1

    Yup! and I had water in the Carburetor just like you said in another video clip. I got my lawnmower up and running again. thank you. as a woman that is not ordinarily involved in mechanical projects ~ you saved the day for me. Your videos are very easy to entreat. I am most grateful. I recommended you to others on my facebook profile. Thanks.

  • @retrogeezer
    @retrogeezer 8 років тому

    Thanks, my mower was running roughly so I got a new gasket and diaphragm, changed it in 30 mins using your video and now mower running great.

  • @GerryVerdy
    @GerryVerdy 5 років тому +1

    Thank you very much for this video! After ten years my mower gave difficulties (problems with starting and priming, motor didn't run smoothly but very irregularly, consumed a lot of fuel and blowed an immense smell of fuel in my face whilst running behind the machine. I was thinking about buying a new one, until I've found this video. After a thorough cleaning from the fuel tank and the carburator, using a cheap product from Wibra (Dutch & Belgian) and replacing the diaphragm and gasket, which costed me only 4 euro (+ delivery cost) problems seemed to be solved! Thank you very much for this very clear and useful tutorial!

  • @teqnikool
    @teqnikool 4 роки тому +1

    Well done!! I've watched several videos where I was told how to do the very same things, but the presentation was so poorly done I wasn't sure if it was correct. Your video makes everything "crystal clear" and instilled a high degree of confidence in doing this repair. Thank you.

  • @dandel351
    @dandel351 5 років тому +1

    Cheers mate this helped a lot. New gaskets on the carb and the old workhorse is running like a dream.

  • @MrJedmeyer
    @MrJedmeyer 2 роки тому

    Thank you! I was looking for a simple tear down on these integrated tank/carb setups. Very insightful!

  • @Catherine-qv9it
    @Catherine-qv9it 5 місяців тому

    Followed this video exactly + cleaned related components meticulously. Repair was 100% successful. Thank you very much for your clear explanation.

  • @notfamousprepper7369
    @notfamousprepper7369 Рік тому

    This gasket fixed my engine surging issues. Thank you!

  • @SuperWatson63
    @SuperWatson63 8 років тому

    was about to go purchase a new lawn mower today tried this and it worked on the first pool thank you

  • @chewierules
    @chewierules 8 років тому

    Excellent tutorial!! It did the job for my mover and it now lives to trim the garden again without loosing it´s breath:-)
    Also changed the air filter and sparkplug and now I´ll just have to change the oil and we´ll be heading hard for another season of cutting grass. Thanks a lot for posting this video I know there are many B&S owners that can benefit from this.

  • @jimm3370
    @jimm3370 7 років тому

    perfect solution, thank you very much. I got the part, followed the vid step by step and it's purring like a kitten now. IT"S IMPORTANT that you clean out that well he mentions at 3:22. I thought that dark area was a shadow. I used Q tips to get all that gunk out and was surprised how much was there. That crap alone probably was half the problem.

  • @chrisuk441
    @chrisuk441 4 роки тому

    Excellent simple guide, literally just watched this step by step and my briggs runs like a dream now. Cheers...

  • @oldrocker3438
    @oldrocker3438 8 років тому

    Thank you so very much! I ordered the spares today. Now I have watched your video I am more confident, and actually looking forward to fixing the poorly mower. Thanks!!

  • @drpackinwood2
    @drpackinwood2 7 років тому

    Thank you for a great video. Saved me from having to buy a new mower. I knew that the diaphragm were the problem but I didn't remember how to remove the carburator. The Briggs Stratton site was no help at all.. thanks again

  • @tentwoyou
    @tentwoyou 6 років тому

    Very helpful, clear, concise and correct. Saved myself a good few quid, replaced the diaphragm and gasket and clean the engine. Mower now working perfectly. Thank you.

  • @pamburke3057
    @pamburke3057 7 років тому

    So helpful, thank you. All changed and mower running fabulously. Didn't have to find a man!!

  • @Killadey
    @Killadey 5 років тому

    This video saved me today. All day i've been trying to get my mower working, i found this video and realised i had the gasket and diaphragm in the wrong order!
    I misinterpreted some online instructions though, so I'm not beating myself up too much, im not a complete numpty :D
    Cheers!

  • @coriscotupi
    @coriscotupi 5 років тому

    Good video.
    The reason some people install the air filter the other way around as mentioned at 07:00 is because on some Briggs & Stratton engine models there is very little clearance between the "V" shape on the filter case and the engine blower housing, making it somewhat of a pain to install it without first removing the blower housing itself, at least partially. But yes, the correct orientation is flat side to the front.

  • @RSPYS
    @RSPYS 7 років тому

    Top quality recording & video. Your great advice showed me how to change my gaskets without a trip to the mower man. Thanks again, I think you have a future in any kind of self-help mechanical show.

  • @GAZZERPOPE
    @GAZZERPOPE Рік тому

    Great video, thanks. I would have suspected the springs but this solved the problem!

  • @AAAAAFSG
    @AAAAAFSG 10 років тому

    I just saved myself a 4 week waiting period. just to do something simple..... thanking you heaps

  • @supporterofeverythingyouli6255
    @supporterofeverythingyouli6255 4 роки тому

    Excellent tutorial ole chap.

  • @ALLaboutGAMINGxCHAOSxHOLLOWx
    @ALLaboutGAMINGxCHAOSxHOLLOWx 8 років тому

    Your video is the clearest on UA-cam! Good video and good job mate!

  • @davebolton8413
    @davebolton8413 8 років тому +14

    Top quality voice & video. Clear advice, thanks.

  • @greggt6
    @greggt6 9 років тому +2

    Thank you, this video was a huge help doing this job on my mower and completely fixed the running issues!

  • @stuarcl
    @stuarcl 8 років тому

    Much appreciated. This was a very informative video. It's videos like this that give us mildly handy guys the confidence to undertake needed maintenance without having to spend a fortune on mechanics fees. Thx!

  • @SH00TMARTY
    @SH00TMARTY 8 років тому

    Great job mate, that linkage was in a different position, a bit of clarity and inmportance.. But Its sorted and runs better than ever.. It was a 2nd hand gift....

  • @adriandevine2824
    @adriandevine2824 6 років тому

    Very well made video. Clear and simple to understand. This made my fix far more simple than it would have been. Heck, it was actually fun! Thanks!

  • @mattiabarbato6794
    @mattiabarbato6794 4 роки тому

    Thanx from Italy. I have the same machine, now i can fix the carburator diaphragma. good video! Sorry for my bad english

  • @BrandonBurch
    @BrandonBurch 8 років тому

    Awesome helped me and was easier than imagined.

  • @Graydood
    @Graydood 8 років тому +1

    thanks much. helped me fix a lawnmower that my neighbor put on the curb. runs good now.

    • @philgray1023
      @philgray1023 4 роки тому

      Made me think. Our salvage yard is full of $25 mowers, probably a few with this same issue.

  • @RobertoSantiagoRodriguez
    @RobertoSantiagoRodriguez 6 років тому

    Great video, thanks! Greetings from Indianapolis, Indiana. USA!

  • @ALForce1
    @ALForce1 9 років тому

    Thanks. Big help. Only took 15 minutes from start to finish.

  • @stevenjackson3926
    @stevenjackson3926 8 років тому

    You helped me out a lot with this - it got my mower working again. A big thank you!!

  • @jeffreycunliffe2814
    @jeffreycunliffe2814 4 роки тому

    Really helpful step by step guide.... And.... My mower started first time and continued to run

  • @CrazyandAngry
    @CrazyandAngry 6 років тому

    Thank you for the video. I feel that 400,000+ people have had to do this which means there is an inherent flaw in the design. Briggs and Stratton should be held accountable in some fashion. My mower has less than 200 hours and eventually would not stay running. I have been in and out of the automotive repair industry over the years and have experience with many types of engines. After replacing the carb diaphragm and gasket, the mower ran great for about 20 minutes (about long enough to mow my front yard which is 20 yards x 20 yards.
    Notes:
    - Tank was emptied and filled with new gas
    - New Spark Plug
    - New filter
    - mower deck cleaned top and bottom of all debris
    - carb and mating surface on gas-tank cleaned spotless
    - new oil
    - verified compression
    - starts only when primed
    - primer bulb has small hole on the face

    • @williamlowery734
      @williamlowery734 6 років тому

      The problem is not in the design. The problem is in leaving the had setting in the mower. The ethanol which is alcohol breaks down the gasket and makes out lose suction from tank. If you let your mower or other gas tools run till they are out off gas it will eliminate the issue and will be ready the next spring to start right up after adding gas

  • @Varcuri9898
    @Varcuri9898 8 років тому

    Great close up of the work!

  • @KinderSurpriseEggFan
    @KinderSurpriseEggFan 7 років тому

    Thanks, worked like a charm. Took about 8 minutes. Great video.

  • @Never2Loud
    @Never2Loud 9 років тому

    Well done. Used this video today to refresh my memory and everything went great, Appreciate the effort.

  • @webtvee
    @webtvee 9 років тому

    Excellent video, very professionally done, what a UTube video should look like.

  • @rnlg6764
    @rnlg6764 8 років тому

    Great video. Thanks for posting. Just what my mower needed It's running like a champ again.

  • @thedayismyenemy
    @thedayismyenemy 6 років тому

    Great video self explanatory, air filter was a bit oily but just went for the gasket kit first. £2.50ish and started first time and to be fair with the clutch in it nearly pulled me off ma feet lol my Ford is now a Ferrarri...

  • @wynkindeworde6504
    @wynkindeworde6504 8 років тому

    Thanks for the video, I fitted new diaphragm and gasket to my B&S and it's now purring again, it's getting on for 20 years old and the deck rusted away and was rebuilt in wood! The throttle linkage managed to dislocate to the left side of the intake pipe on dismantling which had me confused at first but a re-check on the video showed me where it should be. I seem to be missing the secondary spring on the throttle butterfly - but hey ho it works. What is the mechanism that you can click into a different position to the right of the prime button? I lost the manual years ago.

  • @BrentLogan
    @BrentLogan 9 років тому +1

    Thank you, thank you! Because of your video, I was able to get my old pressure washer working again for less than $10, including a new spark plug!

  • @portillojewelers
    @portillojewelers 4 роки тому

    Thanks for the help! Worked like a charm. Great video.

  • @julianadams5753
    @julianadams5753 5 років тому

    Thanks! I was desperate when I didn't know where the little spring went, which was totally apparent from your video. Many thanks!

  • @joh331
    @joh331 6 років тому

    Very clearly and pleasantly presented mate. Well done indeed, thanks.

  • @MikeIOW2
    @MikeIOW2 6 років тому

    Great quality clear video, thanks - my mower lives, all for under a fiver!!

  • @benjames732
    @benjames732 8 років тому +1

    Excellent clip. We followed these instructions and it solved our problem perfectly. Thanks very much!

  • @velioj
    @velioj Рік тому

    Nice to find this. I did my fix and it helped. Thank you for that good video.

  • @sparkyuiop
    @sparkyuiop Рік тому

    What is that spring for under the diaphragm please? Mine kept falling off the carb and moving the gasket when I tried to put it back together! In the end I bought a new carb already assembled and fitted to a new tank I got off Amazon for £20.

  • @AndySevern
    @AndySevern 5 років тому

    Nice! I'd done this before while stripping down and cleaning my engine, so had it all to pieces - this was brilliant becasue it shows how to do it with the MINIMUM amount of disasssembly! Nice and clear too. Oh, engine started FIRST TIME after. Wife very pleased :)

  • @steliosmeris5105
    @steliosmeris5105 11 місяців тому

    You saved the day!. Thanks alot! nice clear video.

  • @jeffkeighley432
    @jeffkeighley432 4 роки тому

    Thanks so helpful, I'm going to give this a try. Mine is a 450 series 148. Would these parts fit?

  • @diegovillarreal3795
    @diegovillarreal3795 8 років тому

    Very useful and clear video. Greetings from Argentina.

  • @stevenolsen6360
    @stevenolsen6360 9 місяців тому

    the o ring from carby to inlet pipe is loose, over the pipe, and in behind the plastic clip holder, should it be fitting snug, there was no gasket too in my neighbour's mower, should the tank only be 3/4 filled each time

  • @tristaylor5492
    @tristaylor5492 4 роки тому

    Followed advice, found loads of dirt.
    Top video

  • @jamesoates6309
    @jamesoates6309 3 роки тому

    Hi I have replaced the gasket and diaphragm but there's a slight drip of petrol coming out on the opposite site to the primer bulb. Any idea why?
    Also the engine is racing too quick now after changing the governor springs.

  • @DTuckerMD
    @DTuckerMD 7 років тому

    Thanks. Same thing - some water in the well where the screen sits. Whatever that's for. I had an O-ring and bushing fall out of the port behind the butterfly valve port where it mates with the engine when I removed the assembly. O-ring goes in first. Mine is the same engine but it's used on a pressure washer.

  • @maxrobinson4270
    @maxrobinson4270 2 роки тому

    Nice video. Do you have a link to a service/operator manual for this model lawnmower? I inherited this mower when we moved into our house and I can’t find the manual online?

  • @justanotherguy9664
    @justanotherguy9664 4 роки тому

    Perfect video. Well done mate.

  • @steveo3002
    @steveo3002 7 років тому

    do these have a mixture screw? mine starts and runs good...but every few seconds i get a "putt" ...not sure if the diaphram is at fault

  • @Masaq_TM
    @Masaq_TM 6 років тому +1

    Concise, informative and extremely helpful. Thank you 👍

  • @alexaskaroff
    @alexaskaroff 11 років тому

    Thank you for your excellent clip. I followed your instructions and it worked a treat my old banger is cutting grass once more. Yipeeee. Oh yeah I had put the air filter on the wrong way Doh...

  • @MrSquidd88
    @MrSquidd88 4 роки тому

    what about the spring??? Goes between the diaphram and carb how did you start it without the spring?

  • @FredMiller
    @FredMiller 5 років тому +2

    Very good video but you forgot to install the spring? I watched your video to get the installation order of the diaphragm and gasket. My power washer that uses the exact same carb never ran right from the day I purchased it new. The gasket and diaphragm had been reversed during factory assembly.

    • @Jack155Q4
      @Jack155Q4 Рік тому

      When i took mine apart, i lost the spring. Any idea what it is there for?

  • @edpowell5754
    @edpowell5754 3 роки тому

    From Buffalo, New York. Thank you for the information.

  • @donnaross8656
    @donnaross8656 7 років тому

    Great detailed video....I'm going to give it a try. Thanks!

  • @timtoolman9940
    @timtoolman9940 2 роки тому

    I installed a new carb and it ran great for a couple months then today went to mow the grass and it wouldn't prime. I found behind the primer bulb some parts. A tiny spring a steel ball and a plug like thing. I got it back in the hole it fell out of now it primes and runs again. I doubt it will stay in place and will fall apart again. The plug think is rubber and used a toothpick to put the parts back in the hole, hard to see so small.

  • @andymora5595
    @andymora5595 2 роки тому

    I replaced the Diaphragm and Gasket an my MTD BM87-35 lawn mover, but it is not tight. The speed of motor changes very fast and sometimes the motor goes off. And some petrol is running out of the gasket.... What can I do now?

  • @mrsemifixit
    @mrsemifixit 5 років тому

    At 1:07 If you’re looking straight at the carburetor with the gas filler cap on your left, when I press the primer bulb gas will come out of a little hole to the left of the bulb (in front of the screw). Is this normal? No return line should be connected to it going to the tank?

  • @1BrownElCamino
    @1BrownElCamino 8 років тому

    Hey GardenMechanic. I have done all the steps outlined in this tutorial correctly, and tightened them down in a star pattern, but upon starting up my mower, I can see some seepage of gas coming out. Is this normal?

  • @kevinworrell7820
    @kevinworrell7820 4 роки тому

    Hi,, I’ve a hayter hawk 375 which starts ok but after about 5 mins of running a lot of smoke is produced,,,, any thoughts please.

  • @user-sw1bi4wj5p
    @user-sw1bi4wj5p Рік тому

    Brilliant and easy to follow

  • @unisol2287
    @unisol2287 8 років тому

    Greetings from US, pretty good job you have done .....

  • @graeme1744
    @graeme1744 7 років тому

    Fantastic video mate

  • @mogbaba
    @mogbaba 9 років тому +1

    Thank you. You could may be say a little bit about the cause which made you change those parts! Great video.

    • @Starfre77ExploresExperience
      @Starfre77ExploresExperience 9 років тому +3

      mogbaba I Did the same with my Briggs engine. When the primer does not suck gasoline in to the carb. that is the problem that diaphragm is faulty, or it has torn, or been wet or a tiny hole might be the reason.. I hope that gave you a picture why he replaced the parts..

    • @mogbaba
      @mogbaba 9 років тому +2

      Thank you, Yes it did.

  • @JoaquinChea
    @JoaquinChea 7 років тому

    Thanks for the video I needed exactly that, but when I reassembled the throttle linkage doesn't seem to work. I only removed the one point like in your video. Any help is greatly appreciated, thanks!

  • @curtisdouglas5436
    @curtisdouglas5436 Рік тому

    Where did the diaphragm spring go when you replaced the diaphragm and gasket. You show it when you remove it, but it appears you did not reinstall it?

  • @jamesfrench7299
    @jamesfrench7299 7 років тому

    A child could do it. Thanks for putting this up. Purred like a cat.

  • @pindajatt730
    @pindajatt730 8 років тому

    Can you tell me what socket size you used to remove the Carb/Petrol tank? Is it a different size to the Spark Plug?

  • @wullawulla54
    @wullawulla54 8 років тому

    have replaced the gasket and diaphragm today following your video. put it back together but the engine will now not run for more than 2 mins. when it cuts out you cannot get it started again. removed the spark plug and it was very sooty so cleaned it and put it back and it run again for 2 mins and cut out again. cleaned the plug again and it run again until I had to stop it to empty the box. wouldn't start again. I put it back in the shed at this point. any idea what the problem is please. the engine before the new parts was running very uneven and guzzling fuel. when it runs it runs lovely now.

    • @MoesKeckeEcke
      @MoesKeckeEcke 8 років тому

      yes same problem on mine..did you fix it?
      There is not much left to do:
      1. clean or new air filter
      2. new spark plug
      3. new springs for the governor
      4. New Carburator which is not cheap :-(

    • @wullawulla54
      @wullawulla54 8 років тому

      +Moes no I didn't mate. The plug is quite wet when you remove it and it guzzles fuel. I think it's going to be a new carb. they about £25 here in uk.

  • @gordbaker896
    @gordbaker896 9 місяців тому

    You should pry out the Main jet and Emulsion tube and clean the holes. There is a tiny flat spot on top of the Jet that you can carefully pry the plastic part secured by a tiny O ring. Reinstall Flush. It snaps in. There are 3 small holes in the tube barrel.

  • @chalkuswhiteus9277
    @chalkuswhiteus9277 9 місяців тому

    No mention of the diaphragm spring inside the Carb?

  • @mychocolatecakes
    @mychocolatecakes 8 років тому

    Thanks for creating this great video. Sadly though, after carefully installing the new diaphragm and gasket, I'm leaking fuel from what looks like the very seal I've replaced; I've removed the carb, checked and reinstalled and it's still leaking? I'm wondering if removing a old (20yrs!) carburetor could have resulted in it losing shape and hence the leak?

    •  4 роки тому

      On reviews placed on amazon for same/similar diaphragm issuessome took and reused old gasket + new gasket (as replacement was not thick enough) I have not done mine yet - but is a aftermarket one ( so either will use 'make a gasket' in a tube - along with gasket .....or both gaskets (tho worry about that causing issues)

  • @Chreed96
    @Chreed96 3 роки тому

    Thanks! When I prime the engine it'll turn over, but only for a second. I'm hoping a new gasket fixes that.

  • @RolandJurke1
    @RolandJurke1 8 років тому

    Great video and a great help. Thanks for that.

  • @outlaw007uk
    @outlaw007uk 6 років тому

    brilliant video like others i saved a lot of money simple fix thanks m8

  • @mariadelcisnefff9319
    @mariadelcisnefff9319 2 роки тому

    Hello .
    Q pasa cuando el diafragma ya no vale como se manifiesta en la maquina

  • @tonyfrewin4822
    @tonyfrewin4822 3 роки тому

    Brilliant video! Thanks.

  • @andrewwhewall
    @andrewwhewall 9 років тому

    Thanks. Helped me out massively.

  • @khuziq984
    @khuziq984 8 років тому

    What did you use to clean the carburetor? washing up liquid, petrol etc. Thank you

    • @Pingaheimer
      @Pingaheimer 8 років тому +1

      carb cleaner works best and evaporates quickly.

  • @scrutton66
    @scrutton66 3 роки тому

    excellent tutorial

  • @dntlss
    @dntlss 8 років тому

    Excellent video,your just like me when it comes to this stuff, I'm a firm believer in clean clean clean, i cringe when i see "parts changers" put parts back on on filthy grimy surfaces, i have to walk away,lol.

  • @animedudevid
    @animedudevid 8 років тому

    I want to thank you for this. Helped me out a lot.