CLEANING A Briggs & Stratton Quantum Lawnmower Carburetor

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HOW TO CLEAN A Briggs & Stratton Quantum Lawnmower Carburetor
In this detailed video tutorial I show you how to remove and clean a carburetor from a Briggs & Stratton Quantum lawnmower engine.
This lawnmower came in the shop with an empty fuel tank. You should always empty the old fuel when performing this procedure.
Link to older bowl nut cleaning video; • HOW TO CLEAN The Carbu...
Watch my video on how to fix a hydro-locked lawnmower;
• How To Fix a Hydro-Loc...
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Easy to follow and thorough step by step tutorials do it yourself (DIY) to help you with your broken lawn and garden equipment including snowblowers.
I do my best to teach you how to easily diagnose problems the fastest, quickest and most efficient way with real repairs beyond just replacing a spark plug. These tips are for both the homeowner and shop owner.
Whether it be a handheld, two stroke, two cycle engine like a chainsaw, weed eater, weed wacker, string trimmer, grass trimmer, line trimmer, hedge trimmer, strimmer, brush cutter, leaf blower, or four stroke, four cycle units like a lawnmower, wood splitter, lawn tractor, snowblower, pressure washer, generator or a ride on mower that needs parts installed or replaced, I’m your go-to guy.
My favorite brands of spark plugs are NGK and Champion and are the ones I recommend.
I’ve been a small engine mechanic for many decades and also run my own repair shop so my videos are loaded with tips and tricks that I have learned and want to share with you. You will also find many tool and product reviews from top brands on my channel as well.
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Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DONYBOY73 “The Small Engine Doctor” assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DONYBOY73 “The Small Engine Doctor” recommends safe practices when working with power tools, hand tools, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DONYBOY73 “The Small Engine Doctor".
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5 окт 2024

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Комментарии : 434

@donyboy73 11 лет назад

check spark, compression, make sure there is fuel to the engine, I usually spray quick start immediately after a rebuild to get it going quicker

@fair2middlin 3 года назад

I started mine as soon as I knew I could, then reassembled the rest after success.

@gergemall Год назад

You're the best

@robertcraven1771 10 лет назад

I've never commented, but your videos have solved problems for me in the past, and today you taught me what I need to know once again. Thanks for the most informative and easiest to understand small engine repair videos on RU-vid. Have a great day!

@donyboy73 10 лет назад

you're welcome Robert!

@davidwee6927 2 года назад

An excellent presentation by the mechanic who loves his job to helping others to solve their mechanical lawn mover problems. Thank you.

@rodrickwimberly3245 2 года назад

Excellent video-you (unlike many others) showed EVERY STEP in a way that we could see all of them to understand for those of us who are not naturally mechanically inclined. Thanks so much!

@donyboy73 2 года назад

Glad it was helpful!

@denhockyee 7 лет назад

your instruction videos are outstanding. well done.

@johnslinn6395 2 года назад

Really useful and i appreciate that you showed how to remove the carb before you cleaned it. Thanks for sharing.

@donyboy73 11 лет назад

yes and make sure the gasket between air filter housing and carb is good

@ristomattikolsi5711 6 лет назад

Hi donyboy73, i could watch you repair machines all day long, because it's art when you do it. Amazing.

@lifesofunny1 9 лет назад

Thanks for another great video. As always, it was very helpful, clear, comprehensive, and professionally done. And thanks for making your videos "DIY-friendly". I really appreciate your focus on safety also.

@donyboy73 9 лет назад

lifesofunny1 thanks

@SuperBabyAB 10 лет назад

I was just given this lawnmower as a hand-me-down and it looked to be in great condition. I went to fire it up to warm the oil to change it, and had the same problem in needing to prime the mower to keep it going. Luckily I watched this video last night for kicks and knew exactly what to do. It now works like a charm. Thanks for saving me money and allowing me to add another notch to my DIY belt!

@nico008b 4 года назад

Excellent video, this fixed my Quantum, until now it kept stopping unless I kept pumping.

@charleshiggins7968 7 лет назад

Awesome video.... thanks for the advice. My snowblower works perfect now. It was the bull nose bolt, those little holes were plugged.

@nas4free 5 лет назад

Much Appreciated. Your instructions worked perfectly on my 2 year old snowblower which would not start. Turns out the carb was was gunked up with green sticky deposits , which I'm guessing might be copper carbonate caused by crappy ethanol in my fuel. I've subscribed to your channel which are the best quality videos I was able to find. You saved my 120 dollars by not needing to take to my small motor repair shop.

@donyboy73 5 лет назад

you're welcome

@cbsbass4142 3 года назад

Looks very clean, so it's strange the carb would be dirty, BUT, I did follow a video and found mine had a clogged jet, used a paper clip to unclog it and now it starts and runs fine. Thank you, RU-vid.

@Mandas999 Год назад

thanks dude got an old mower from the previous homeowner didnt even get halfway thru my lawn and the motor started dying on me, came back the next day and did everything you did now its purring

@xtubalnet 2 месяца назад

Your channel is one of my favorite ones. I especially like the way you announce the size wrenches you use. That's very helpful. Thanks.

@bradfordfox3954 10 лет назад

Thanks for the great videos. Our hand me down mower always had a really rough idle, then wouldn't run unless you pressed the prime button, as you showed here. I cleaned some gelatinous substance from the bottom of the fuel bowl (otherwise the carburetor looked clean), and once I remember to prime it, it started and ran as smooth as in the video; smoother than it ever had for us.

@RTD1947 3 года назад

DIYer here!! Thanks!!! Great tips!!!! I have a DR lawn tractor with a Brigs. 20 years old giving me fits not wanting to run!! Excellent camera work... outstanding step by step!!!

@miked5092 2 года назад

I just cleaned my carburetor assuming that I had a dirty needle and seat. However put it all back together still would not run. So found your video and realized that I never checked the passages in the bowl nut. When I checked I discovered the passages were completely blocked. Cleaned them out with carb cleaner and some small gauge wire. Mower now runs like new. Many thanks.

@donyboy73 11 лет назад

I use the blue dove dish soap and Zep orange degreaser from home depot

@ristomattikolsi9827 7 лет назад

I really admire how you fix things donyboy, you are a motor wizard.

@1pritzel 10 лет назад

GREAT, concise and clear instructions donyboy! Unlike other instructional videos on lawnmowers etc, your video quality and narration is highly professional! i'll keep 'tuned' in!! Keep up the good work!

@donyboy73 10 лет назад

thanks nick!

@donyboy73 11 лет назад

I paid $189 for the FUEL M12 with 3 batteries, one is an XC 4.0

@petercunningham4000 6 лет назад

I am So pleased to have found this video. I have a "Greenfield" ride on mower with a 6HP Briggs and Stratton engine that will run for about 15 minutes then stalls. If I loosen the fuel line After the in-line filter, the fuel miraculously appears in the inline filter again, the engine starts and runs till the next time it "runs out of fuel!. I now feel confident about taking the carburettor off. Thank You for sharing your knowledge, and the very clear and concise videos'.

@zyplex1 4 года назад

Thx for showing in detailed, how you performed this work. Kept my full attention thru out the whole video.

@rpavlik1 10 лет назад

A belated thank you for this video: was watching it as a refresher and realized this is where you mentioned using a tip cleaner for the little holes. I'm not a welder so it took me a while to find what you meant (a little $3 thing in the welding department) but now that I have one it's great. As a suggestion, I used a pair of side cutters to snip off the smooth end portion of a few of the files so they can clean shallow holes better.

@wenhaogu3724 11 лет назад

I keep watching videos you posted weekly. They are very helpful. I learned how to maintain even fix my tool properly.

@holidayfinn 4 года назад

That was great. I’m having the same problem. Your instructions were precise and easy to understand. Thanks!

@francislayton76 10 лет назад

Your video was so helpful and I was able to get my machine back cutting grass again! Plus you saved me $70! Thanks. :)

@peej123 8 лет назад

Another great video from Don. I must confess that at first I did not understand what Don meant when he said that the bowl bolt is also a jet and why he went to so much trouble to clean it. I cleaned my carb body to within in an inch of it's life and could not get the engine to run for more that a second or two. After paying real close attention to the bolt one last time it fired right up. Basically the bolt is hollow and gas gets sucked up through it. If the orifices in the bolt are clogged the engine will not run. After going through this I now understand why Don was so meticulous with the bolt! It does more than just hold the bowl on!! Thanks Again Don! You have a great channel!!

@donyboy73 8 лет назад

+Paul M thanks Paul

@kevinbolin7665 8 лет назад

Donyboy 73 you never disappoint [great video]I wish more videos on youtube were as detailed as yours [keep up the good work]

@donyboy73 8 лет назад

+Kevin Bolin thanks Kevin

@chriscrilly8807 Год назад

Fabulous video. I'm a rank anateur, terrified of internal combustion engines of all stripe, (scared of anything diesel too), but thanks to you I can now confidently yank the carb on my mower and do yeoman work. Thanks. You have a gift for clarity.

@rwfisheriv 8 лет назад

Many thanks. You wouldn't believe how gunked up the carb on my pressure washer engine was....but cleaned it following your instructions and it started right up.

@jetseat 2 года назад

Thank you, thank you, thank you, for the explicit video on rebuilding a Briggs & Stratton carburetor. It made it easy for this dinosaur to be successful in rebuilding my carburetor without fear of screwing it up the first time correctly. 👍👍👍

@macoeur1122 8 лет назад

Thank you sooooo much for this video! One of three total videos I found that solved my problem! I needed to mow my lawn...the repair people had a two week wait just to diagnose and they said it could be more than $200 to fix it based on what I had described (I didn't pay that much for the mower, new!) Thought I was going to have to trash the whole thing. I ordered a carburetor overhaul kit online (under $7)... which hasn't even arrived yet...and a can of carburetor cleaner, and just went in and cleaned everything out...et voila! I'm overjoyed! Got the whole yard mowed and no more gas leaking out! AND!!!! I now know I won't have to keep buying and trashing lawn mowers on a regular basis! :)))))

@johnwhitehead3685 8 лет назад

Excellent video, great camera work. So much more informative and "watchable" than these weekend warrior videographers who hold the camera in one hand and work with the other! Very clear vocals and diction...I was thinking Canadian, then I saw the predominant French on the can of started fluid...that clinched it! The engine on my pressure washer had exactly this problem and I was a little leary about messing with it myself. After this video, I feel completely comfortable pulling the carb off and cleaning it. Thanks. I've subscribed!

@donyboy73 8 лет назад

thanks for subscribing and greetings from Ontario Canada

@Mr.XJ.96 8 лет назад

+donyboy73.... thanks for your videos Bud. I've learned quit a bit by watching them. I've done a head gasket and adjusted the valves on my Briggs 18.5hp. I've got a Walbro carburetor, Do you have a video on how to adjust the Carburetor?

@mikerobinson579 4 года назад

Excellent clear camera work. Thanks.

@carbboy6726 10 лет назад

This really helped me! 2 points: 1.next time I'd never remove the needle valve seat! just block the channel to keep the carb cleaner away from the tiny rubber seat. I damaged it on removal. 2. If you do and are replacing with a new one, know that the tube is TAPERED down to the needle valve seat location, at first the replacement appeared too small, but when tamped into place it fit fine.

@Owentraxxastamiya 11 лет назад

Me did this the other day!! Your videos are so helpful!!!!

@wyatt-pf7zl 10 лет назад

Oustanding video. Very methodical and thorough. Excellent.

@ostaz007 9 лет назад

Thx man!! So clear and to the point, I am really happy with you being on RU-vid

@donyboy73 9 лет назад

ostaz007 thanks, make sure you are subscribed

@itsyoureternalsoul 9 лет назад

YOU ARE THE BOMB! I feel like I could be a success now with my Briggs 6 HP tiller!

@donyboy73 9 лет назад

itsyoureternalsoul lol

@donyboy73 11 лет назад

they don't because of cost issues, you can install an in-line one

@SJgunguy24 10 лет назад

I've watched maybe 15 videos and not one had the same carb that was on my lawn mower or had the same problem. This one does, I already bought the rebuild kit because the gaskets were shot. I'm going to the garage to whip this beotch back in shape. Thank you donyboy73!

@donyboy73 10 лет назад

happy repair, lol

@jimsnellen6222 6 месяцев назад

Very well done. I’m doing the exact same thing but didn’t know about the float pin gasket. I hope my carburetor cleaner didn’t ruin it.

@Tommyr 11 лет назад

Another great, detailed video Don! Thanks so much! I can watch these all day!

@donyboy73 11 лет назад

if it runs good then it can't be a big deal, however it's always better to have parts where they go

@tarunarya1780 2 месяца назад

Thank you for really great and clear breakdown of what to do. I will try and get mine going now.

@condor5635 4 года назад

Great job! Took mine apart years ago but this was a good refresher. Thanks for posting.

@Stevet19791 11 лет назад

That was the best detailed video I have ever seen!! Thanks Donny great job!!

@philliphall5198 Год назад

Happy I found a video I’ve not watched, cool thing to watch Never quit learning from others Thanks 🙏

@vartikcsaba 7 лет назад

Thank you for this video! I just clean the carb on my lawn mower. Could you please tell me the part number of the gasket kit for this carburetor?

@waynebryant1173 7 лет назад

Wow!! This video tutorial was just what i needed to help me get my mower back on track! I had viewed several others. But, this one was geared for my briggs&stratton engine. So, KUDOS to Donyboy, for an excellent Mower Maintenance For Dummies video. I will check out any and all of your other offerings. WayneBo in The D

@oiseaudenuit 8 лет назад

i been watching yours video and you are very good! well explained good voice etc. i wish you were at the corner of my street!😍

@johnstafford2402 5 лет назад

Used this vid, got my ranch king brush trimmer back up and going again. You’re awesome sir, thank you!!

@Beerpiglet 11 лет назад

Great video the mower looks to be brand new to a point I thought i could see black paint over-spray on the spark plug indicating its still got the original plug from the Briggs & stratton factory.

@AnthemBassMan 5 лет назад

I’m a major vintage Lawn Boy 2 stroke fan, but those Briggs Quantum engines are pretty solid and simple to keep running. Definitely like the flathead Quantum better than the OHV Intek series. Keep up the great videos! Always look forward to seeing your newest one.

@baddad5781 3 года назад

Yet again I have to say thank you for this very well done video. You do such a good job filming, explaining etc that anyone can learn from your instructions. I'd love to work in your shop 3 months for free just to learn from you. Thanks again.

@evanchapmanfanman 7 лет назад

its amazing how many of these things end up on the side of the road due to this issue. one easy fix later and it can be either resold or kept for personal use

@jimwhalley2450 Год назад

I Literally got this same mower two days ago.. carb clean..and reset the butterfly valve which had somehow dislodged and jammed at wide open.. and it runs like a top.

@Mr3Charlie 4 года назад

Great video! Lots of detail and it gave me a better understanding and more confidence to do this job! Do you have a similar video on and adjustable carb and how to find an adjustable carb to replace a non-adjustable?

@donyboy73 4 года назад

i do but only for snowblowers

@icandoit20 11 лет назад

Great job! Very detailed instructions.

@nickl1682 4 года назад

Manual choke works a lot better than the auto chock . Looks like a brand new mower . Thanks

@donyboy73 11 лет назад

yes it works better, this one retails over $300, but there are cheaper one on ebay. if you get one make sure to get the heated one

@elvisoxford9049 5 лет назад

I followed you video and it worked first time, Thanks bro.

@michaelwindsurfer54 11 лет назад

even tho i know this i still watch your videos because they are nice to watch and the video has good quality good job mate!

@542740038 11 лет назад

Great video Donny !! .. another tip ..If time is not an issue for the diy-ers I usually just take it apart and let the metal parts soak overnight in varsol or paint thinner .. next day clean as a whistle. I know you`re in business and time is money, but I have more time than money ...lol

@MrPsyolent 11 лет назад

awesome timing, i have to clean the carb on my mower as it won't start :)

@frankslattery9962 10 лет назад

Great Video but before working on any power equipment I always remove the spark plug boot just to be sure there are no accidents. Too many times I have seen people with injuries from there lawn and garden equipment.

@rickforsty9410 3 года назад

Thank you for your in depth video and step by step instruction.,ihave fixed a rider lawnmower and a snow thrower that was waffling by drilling the removable jet.and a carb cleaning a push mower that wouldn't start. Thank you so much!! Oh I used a o18 micro drill the smallest in the kit!

@rosskstar 10 лет назад

He's like the Mr. Rogers of small engine repair!

@PeterAgostiniJdcap26 11 лет назад

Great detail Doc TU!.. just goes show ya you may think you have all the gas out on a new mower to store for winter or just plum forgot when the snow hits, it happens . best

@wf8933 6 лет назад

Great video with clear instructions, thanks

@tommycoffey2085 5 лет назад

I have been enjoying your videos for YEARS.Thanks

@donnasetterbo830 9 лет назад

Thank you so much. I'm having trouble with the bowl gasket leaking, but I see I may just have to fully remove the carburetor---it probably needs cleaning anyway---and hopefully will have better luck seating the gasket.

@donyboy73 11 лет назад

thanks man, greetings from Canada!

@donyboy73 11 лет назад

it could, you should also replace the bowl and install kit 631021b

@Hear-MeoutTwo2 2 года назад

Late yesterday I removed this carb from a Weedeater mower. Will place it in my ultrasonic cleaner today and replace it. I am on a roll, repaired my JD GT275 lawn tractor yesterday and it is running like new.

@Mogalize 9 лет назад

Thank you, I have a running lawn mower again :) Not sure what the actually problem was (everything looked clear) but after cleaning it, three pulls and it was running again!

@bobgreene2892 8 лет назад

To save a few minutes in the procedure, some viewers may plan to remove only the threaded nut beneath the carburetor bowl and the bowl, itself. However, on a dirty, dustry engine, dirt and debris are likely to fall into the bowl on removal. And after cleaning the bowl,, reinstallation of the bowl requires the bowl be aligned precisely to avoid dislodging more debris-- almost any speck of dirt can cause a problem, and may compromise the work completed. The best approach is hose off all the debris (from a completely cool engine) well before the carburetor operation, and to let the machine dry, first. Since cleaning the carburetor is done only occasionally, it may be worthwhile to use a car wash pressure spray wand for a more thorough cleaning of hard-to-reach areas. BTW, this is an excellent video-- well organized, with superbly lighted and focused close-up shots, and a clearly spoken narration. Wish all the videos had at least the production values of this one.

@bigbass122 11 лет назад

Excellent video. Did not know you could spray carb cleaner on the float bowl, I thought it would slightly melt. Keep up the great vids.

@donyboy73 11 лет назад

yes indeed

@cfishel15 11 лет назад

Thanks for the reply! I decided to get the M12 -- couldn't pass up the $99 price at Home Depot, which included two batteries, a charger, and case! I think I lucked out!

@jayyewm.d.2853 10 лет назад

great. I just ordered the carb overhaul kit on Amazon for $9. Very useful video. Thanks!

@starrm733 9 лет назад

Apologies for the lengthy question... Got Troybilt with 675 B/S, no primer bulb, from a Lady whose young son way, way overfilled the oil. Somewhere along the line he hit something to bend the blade and shear the key on the blade adapter as well. After draining the oil, I first pulled the starter, and a bit of oil spewed from the spark plug hole. After a good Carb clean, oil change, blade and adapter replacement, I took off the muffler and about 2oz of oil poured out. Put it back together, started on first pull, smoked like crazy for about 7 min, then I mowed my back yard with her machine for about 20 min. Went to deliver it to her the next day, and realized I forgot the bend the tabs on the muffler washer and lost one of her muffler bolts somewhere in my yard. Made a mad dash to the hardware store for a new bolt and spacers. I over tightened the bolt a bit due to the spacer inside being slightly shorter than the other bolt, slightly denting the muffler. Got it unloaded at her house, pulled the starter and it lugged and chugged, finally dying. I took it back and figured to look at the last thing I did to the machine. I checked the muffler mounting bolts, all gaskets are in place and the choke arm is free. I reckoned it might be a partially sheared flywheel key that I finished off mowing my lawn. Replaced that, (it was not sheared, but starting to) Same problem, it starts, chugs and lugs along until I manually open the choke butterfly, and will sputter, eventually rev up, hunt around for speed for 15 seconds, and finally warms up and smooths out. I have adjusted the throttle arm to up the rpm from 2600 to 3250. I cleaned the carb again, this time replacing the valve seat, and new intake gasket and manifold o-ring, double checking with a fine wire that all passages are clear in the carb. The choke linkage and governor linkage operates freely with no snags or tension. I have now drained the oil and gas again, and have it nose down to assist draining any more oil that may in the top end, however none is really coming out the spark plug hole. I can't send it back to her with instructions to stick her fingers behind the airbox to jiggle the linkage around till it starts running right. I'm at a loss. Any ideas?

@chrisbacon7308 10 лет назад

Using an old tooth brush is a great idea, thanks for the tip.

@donyboy73 11 лет назад

this one is the M18, very good unit, I also recently bought the m12, I have to edit tool review videos I have recently made

@donyboy73 11 лет назад

same here, take care

@johnslinn6395 2 года назад

Thanks very much for sharing your skills via this video. I am going to see if you have one related to servicing the spark plug. Thank again!!

@billy5974 6 лет назад

Thanks for this video it helped me to rebuild my carburetor last year. I rebuilt this carb thinking it would help my surging problem,but i think it is my governor. Could do a video on how to adjust the governor on this type of engine. Since the throttle is already open which way do you turn the shaft to correctly set it. Thanks again for all your videos

@tweaked53 8 лет назад

Nice job, best one I've seen on here yet. Thanks for the tips and warnings about what not to do, as well. I had no idea carb cleaner was so dangerous.

@robertkarl29 11 лет назад

Another outstanding video. Always informative. Keep them coming.

@cocobunnyco 8 лет назад

thank you so much you saved me $60. Home Depot said they would clean it for that.

@milindkhurd 11 лет назад

That video is the best on Carb cleaning. Do you have a video on replacing craftsman carburetor throttle shaft. Thanks.

@aj9270 11 лет назад

Another great video Dony ! I always look forward to your new vids !

@jbetz78 10 лет назад

Best carb video on RU-vid!

@donyboy73 10 лет назад

thanks Jonathan

@natemedlin8171 11 лет назад

Hey dony its Nate I bought a Craftsman 25cc straight shaft weed eater yesterday and used it 2day it's starts and runs great but it has a high pitched whine noise when throttled up @ cutting head. It has a clutch also. It was made in august of 2013.