Carburetors - Explained

How do carburetors work? This video explains carburetors and the components involved. They are used to mix the fuel into the air entering the engine, and are placed just before the throttle body.
The technology is old, however is still used in small engine applications such as lawnmowers, weedwackers, chainsaws, etc.
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[@1SmokingLizard]

self-taught college kid who makes a professor's hour long lecture just as informative inside 3:30 minutes for most people to understand not needing the entire physics behind the concept. great job sir!

[@EngineeringExplained]

erin morales Haha thanks!

[@yapnop2]

You are damn right mate, why don't we have such lecturers in college, I mean, great minds like this guy, do exist after all.

[@zainulabideenzain3]

Couldn't agree more :)

[@Eviscerate86]

There are so many useless college professors these days. So many engineering students had to taught themselves.

[@adrienperie6119]

Well you do have to understand the physics to truly understand what makes it work, otherwise you don't really know why it works, just that it does by being a certain way.

[@ahmadsamadzai8255]

Literally looked up a dozen of these videos and couldn't really grasp it till watching this. Thank you sir.

[@nfperrini]

This is honestly the best explanation I've found. TY

[@EngineeringExplained]

Happy to hear it, thanks for watching!

[@ultramb6206]

True

[@matthewdinola1422]

I second that. Great explanation

[@AlphaSierra375]

Sincerely, Thank you.

[@ddddoc7078]

Zero flash here but the info is just right

[@EngineeringExplained]

You're welcome! Glad it helped you out. Cheers.

[@nicmeehan5142]

Wow, Jason I cannot believe how far you've come in 5 years!

[@EngineeringExplained]

+Nicholas Meehan Haha, thanks Nicholas! 4 1/2 but who's counting! ;)

[@kylehubick6589]

+Nicholas Meehan I was thinking the exact same thing!! Completely different, in a great way!

[@vladandrei51]

@@EngineeringExplained Jason, I can not believe how far you've come in 10 years! :D Props to you man.

[@mr.blackhawk142]

He a rocket surgeon now??? :P

[@migueldejesus3784]

It's amazing how tens of thousands of people paid through the nose for what I learned here in five minutes. Thanks dude. You explain this better than some machanics I know

[@nicolascuriel]

He explains better than any mechanic I had met. btw I only know like 3

[@jamshedahmed1491]

cute

[@aeroscience9834]

Miguel Dejesus You think you just got the knowledge of an engineering degree in a few minute video? Lol, keep dreaming. Ignorance is a bliss I guess.

[@rohinimishra9437]

Aeroscience atleast we will get an idea what it is and then study from book .why so ignorant??

[@ha_ha-ha_ha]

I hope you never ever touch a car engine. You're a hazard going by your attitude.

[@mfalasa]

After having seen so many of your newer videos, it was so amusing to see this nearly 10 year old video from you! I do miss the short and sweet video format of days past...

[@EngineeringExplained]

The choke is used to restrict air-flow at the start in order to inject more fuel for starting the engine. After that, the choke is left open and the throttle valve controls the airflow.

[@EngineeringExplained]

Thank you! I still make mistakes but I try to at least make a note in the description if so. Glad you enjoy the videos!

[@Randy-ev2kw]

12 years later this video just helped me understand my holley carb infinitely better. Thanks dude.

[@Mprikiman]

Jason, if you were a professor in the vehicle department of our university, I would choose vehicles instead of electronics. Too bad that besides that's not the case, we are also of the same age. I admire your effort and your achievements. Keep up the good work mate!

[@notyourrealfather]

Crazy to see this video after seeing a bunch of your newer videos! You've come a long way, but always done a great job!

[@freighttrain7143]

I've been watching KZbin videos for probably 7 years, and I am subscribed to a total of 3 channels. Including yours. Way to get to the point quickly and explain what you said you were gonna explain clearly. 5 stars man.

[@labradormcgraw2409]

I've said it once, I'll say it again - this guy embodies everything that's great about KZbin. Unrivaled knowledge coupled with a natural talent for teaching... add to this the seldom-seen ability to include only what we really need to know, and what we have is an absolutely indispensable learning resource. The fact that, through KZbin, we get all that for free necessitates the burning question: why are we paying $$$$s each year for inferior quality tuition from our colleges? Huge respect to EE!

[@dann5480]

The best explanation of how a carburetor works out there on the Internet. KZbin should put this video at the top of its recommendations instead of that horrible SmarterEveryDay slow motion camera dude.

[@Coredor3]

This is the first video I watched. I'm going to subscribe now.. I'm trying to learn more about my truck. Your explaination and diagram are the most comprehensive way I learn. Thanks, I'll be checking out the other videos.

[@EngineeringExplained]

+LynchMobbin Thanks for subscribing!

[@71iron13]

thanks for this vid. I'm a nerdy engineer who works on small engines as a hobby. This video was direct and to the point which was easy to understand. It's easy to present the information but to explain it in a way that makes sense is difficult. Your explanation was perfect. keep em coming.

[@tankermottind]

It's a toilet for fuel.

[@eatsleepgamereview]

You just summed up this whole video.

[@Fr33zeBurn]

You heard of Rons flying toliet

[@samensophie5122]

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[@Afeldenstylee]

Hey, I'm from Germany and I'm working on cars everday. Since I'm interested in every technical detail I just want to know how everything works...now I just saw your videos and i got to say you explain everything just right - I didn't find any false statements! Keep on doing that stuff, your channel is awesome!

[@prateekkhade]

one of the best persons on internet explaining about car tech.. hats off mann!! :)

[@MrShobinstein]

Bro.. You did what most animations and 3d drawings couldn't.. Awesome.

[@Discretesignals]

The explain of pressure difference causing fuel to move is spot on. Most people think that the fuel is being sucked out of the bowl when in fact it is the difference of pressure that causes the fuel to be drawn out into the annular booster sitting in the middle of the venturi to be atomized.

[@abhishay22]

I was watching your current videos, until i bumped on this 1, do look like a teenage kid though, you were kicking since you've started man. Keep up.

[@phillipranglin7928]

Amazing video! I'm trying to convert a carburetted gas generator to run on propane, and I didn't want to proceed until I understood how the mechanism worked (since I'm otherwise exclusively a diesel/cooking oil person). This fills in all the scientific gaps, so thank you!

[@razorgg]

so 3and a half minutes, that is how long a you tube should be, and this was great. Thank you.

[@thecherokeechannel688]

Dang! This video is pretty old and STILL has the easiest explanation to these systems. thanks jason. Been following for several years didnt expect to find this. Great job!

[@ryoga8170]

I never could understand carbs until now, you explain it very well and I have NO QUESTIONS!😎👌

[@daulatneupane4055]

Excellent. Didn't know a thing about Carburetors expect that they are used in motorcycles and cars. Now I feel I can design one haha. Precise and Concise explanation. Thanks!

[@TheDrunkardHu]

😢And now you're all grown up! Trying to source some videos for my son to watch. Yours are just as effective now as they were back then. 👌

[@greauxpete]

I'm a mecanical engineer, best explanation I've seen so far.. Great job..

[@slippyn64]

Hi, chemical engineer here, this is an EXCELLENT explanation.

[@EngineeringExplained]

Thanks, great to hear! I even use it myself from time to time; it's tough remembering everything. :)

[@MontiGabriel]

Thanks to COVID 19 I found time to understand how a carburator works and definitely, of the 7 or 8 videos I have looked at this is definitely the best. Congrats !!! i am suscribed to your channel right away.

[@frustrateduser666]

Thank you. I am an engineer, albeit in a different stream, and I appreciate the in-depth technical explanations :)

[@chaff5]

Seeing your current vid on PI and DI, I went to look up the pros and cons of Carburetors and of course, this video is among the listed videos!

[@EngineeringExplained]

@Veggies94 Depends on the setup, can be either or, but one carb is more common leading to the intake manifold. Higher performance engines (older, obviously) may use one per cylinder.

[@simedogz]

The best video on carburetor operation I have ever seen. Bravo.

[@declanobrien4852]

I remember checking out your videos about how all wheel drive, four wheel drive, and transfer cases work. Sadly I forgot about your videos but no more! I'm subscribing and definitely going to catch up on your videos. Great presentation and information, you are a very smart guy.

[@MultiBeast301]

Nice explanation. No need to use 10 minutes to explain a simple concept like every other video. Subed

[@hdwblade]

One of his early videos still making me smarter! 😅

[@sherlynmillet5702]

very well explained, can be understood by anyone who have a zero knowledge on this kind of system, keep it up, and waiting for more videos..

[@MichaelDelugg]

Just what I needed. A concise, clear explanation. Thank you! And Happy New Year!

[@ericvernivich]

Awesome video man! really well explained. Im just about to start my motor-mechanic apprenticeship and your videos are a great way to help me understand how things work :) keep up the good work!

[@lou_leem]

Wow I'm watching this video at 1000000+ subs. Congratulations

[@mikebolton2388]

+ls7orBust same here

[@igordvr]

Man your videos are great! I'm Engineer too... but Telecommunications / Electronics / Electrical... But like you I love cars! Keep on going and improving, cuz nothing is so good that can't be improved further! Cya!

[@SamuelTurnmire]

Got a push mower that is giving me some headache. Guy I got it from said that if it wouldn't keep running it was a problem with the carburetor and he'd come by and fix it. I had no idea what they did just that cars didn't have them typically anymore. This video is fantastic ... thanks!

[@AGregariousPOS]

I love your videos but maybe it's time to revisit this and upload a more "updated" version. Please 😃

[@HistoricalWonder720]

Nah never forget where his roots came from. Leave this gem up

[@keze7998]

thanks, the videos provides more useful information than many other websites. Looking forward to more videos.

[@osamamaddani]

you explain things better than a lot of proffesors and PhDs I know 😂 even though your presentation in newer videos is better but still this is very good

[@v4riab1lity77]

“Even though your presentation in newer videos is better but still-“ this filthy bacterium of a species features less self awareness than a tree. I wish one man could have the power to wipe an entire species- but no. I must continually bear witness to grown matured adult humans being lesser minded than literal grade schoolers

[@EngineeringExplained]

In a carbureted car it may not be much different either way, maybe less in neutral since it will be revving lower, then again in gear it doesn't need any fuel to continue moving. Regardless, it's a very minimal gain. If you're looking to save fuel there are much better methods. Drive slower, accelerate slower, etc...

[@titustsui377]

WOW. I never knew that you were making videos that long ago. Congrats. I love your videos.

[@LilleyAdam]

Mate, this was a brilliant, easy to understand, and logical presentation of a carb. Kudos.

[@ramchillarege1658]

Thank you. Excellent Video.. I needed a refresher from 50 years ago

[@nolanatorhf]

i probably learned more in this 3 minute video than i did in the last 4 years i spent in highschool....excellent video!!

[@justinhottle3799]

your really good at explaining stuff man. anytime I have a question about something, ill look up your videos

[@madcat4563]

This guy is a wizard and he's been doing it for years. I love that it is easy to follow and even a caveman like me that ditched physics in High school can understand it.

[@gamerfela8317]

Thanks a lot! Tomorrow i have exam and u made it clear the topic in a few minutes!!

[@asif_xo]

I think it's never too late to learn Thanks Jason! My senpai in automobile world ❤️

[@crisprapper]

Thank you for this, I had little idea of what goes on in a carburetor and now it almost makes perfect sense.

[@vivekvardhan5671]

you are a perfect mech tutor No two words about it

[@EngineeringExplained]

I'm sure it could be fine tuned to optimal fuel efficiency, carbs were used in NASCAR I believe up until just recently, I'm sure they had them dialed in right. That said, it's very difficult to compete with direct injection, as this allows for the fuel to be injected at the exact times when it will yield the most power or the best fuel economy, something carbs cannot regulate.

[@nathanw.5367]

Yup - this was very useful….even 10 years later. Thank you!

[@ImAlrightITHINK]

This must be one from when you first started. You've come a long way that's really cool to see.

[@LeftyLucyRightyTyty]

To start an automatic choke equiped engine, we first press the gas pedal to the floor.This squirts a bit of fuel in the manifold.It also allows the bimetal spring to close the choke valve and move the idle kicker

[@siapahno6833]

Explained very clearly. Thanks.

[@maccliff2115]

I went to UTI in Phoenix (Avondale) I didn’t understand what a Venturi effect was, or pressure differentials / vacuum. I do now after working in the oil field. Good video

[@superflytnt]

Best video I've seen to explain the topic. Fortunately I've got some understanding of Newtonian physics so I understand pressure differential, but a little more layman would have made me pause and rewind less to make sure I understand what you were saying. I did love the video though.

[@marinuslubbe3993]

CAN'T.STOP.LEARNING. !!! Your videos are adictive ! Congrats man and keep up the great job !!

[@EngineeringExplained]

Yes, more air means more fuel can burn. It's balanced. However, with a diesel vehicle the gas pedal actually does increase the amount of fuel injected (the ratio of air to fuel goes down).

[@flightofthefatman]

Thanks bro for all of your videos! They are really interesting, informative. well delivered and more importantly concise and to the point.

[@doingFinops]

Hi Jason. Thanks for the great video but it would be greatly appreciated if you could do a updated video including more info on carburetor. (Air fuel ratio correction, jet, etc.)

[@rohinimishra9437]

Ghoshan Jaganathamani why dont u just give him your sem syllabus

[@TartaricKnight]

Great video and explanation. Clear and concise, terminology explained, good usage of principles and easy to see visual drawing. Nicely done

[@gogetsoncik1234]

So just to clarify (learning about cars) the carburetor mixes the outside air with the fuel inside your car to make a fine spray to be fed into your cylinders. The fuel is inside a float bowl, also inside is a ball that stops the flow of fuel to keep it from overflowing. Once the bowl is full the fuel flows into the discharge nozzle to mix with the outside air, the fuel is already filtered by the time it reaches to this point. The air flows through the venturi to increase velocity and decrease pressure meaning it speeds up the air to go through the butterfly valve which is the throttle. When the throttle is open it lets mass amount of air into the engine to give it more power, when close it does the opposite effect. Even when fully closed it goes through an idle jet that keeps the engine from dying.

[@101bluedrop]

Just incase you don't know carbs aren't used on cars after the late 70s (ish) and have been replaced by injection.

[@gogetsoncik1234]

Pat I know this, thanks anyways.

[@tboy2466]

Pat fuel injection was introduced at about that time but some cars still used carburetors for some time, I had a 1989 Peugeot 205 with one

[@SACTOWNOG]

Very helpful thank you. I was trying to figure out my choke on my 1933 Dodge and this helped to set it. much appreciated.

[@EngineeringExplained]

Yes, I should be getting into hybrids/electrics within the coming months!

[@danwindingstad182]

Well put! Now I understand my motorcycle a little better! You should do more videos about bikes! I'd love to see those!

[@EngineeringExplained]

@powprashant Sounds right to me! Bikes with fuel injection are typically much easier to start in cold weather.

[@pedrocasado6008]

First video of yours I watch that you haven't said : "Hello Everyone and welcome to this weeks video!"

[@F6HemiCharger]

No Problem. I'll elaborate a little. It was in about 1970 when this happened. Some cars had it before 1970 but it was much more common after then. This came about when Nixon established the EPA and signed the Clean Air Act of 1969. The EPA put the sqeeze on Detroit and Detroit responded by lowering compression ratios, output, and introducing Evaporative Emissions Controls, in an effort to reduce overall emissions, in addition to preheaters, which also improved cold weather drivability.

[@farrda1]

Your the best explanation so far. Thank you.

[@F6HemiCharger]

These preheaters were only a bimetallic strip that when closed would complete a vacuum circuit. The vacuum hose from the carburetor would be connected to the primative sensor which was located inside the air cleaner lid, then be connected to a diaphragm and a rod which opened and closed a door in the snorkel on the air cleaner. these usually operate in temperatures of 65 degrees or less (inside the air cleaner). These usually opened at 105 degrees, and were modualted for optimum operation.

[@drumcrazy72]

For dummies like me, Closing the choke translates to turning ON the choke mechanism on the machine. Opening the choke means turning OFF the choke mechanism. Great video but not dumbed down enough for an old cook ;) Requires similar thinking to a windows operating system whereby you turn off the computer by first clicking the Start button :)

[@EngineeringExplained]

Very welcome, glad you appreciate it!

[@gallaveerabala7419]

Wow I think this is the best vedio ever on this topic ......I mean even upto 2020. thank u ,helped a lot

[@ChaeSeo]

Best explanation I have heard ever.

[@EngineeringExplained]

Not sure what you're asking. It's so that you can have a difference in pressure, allowing for the fuel to be drawn to the lower pressure area.

[@mustangfantony]

Very good video. It will help me tomorrow when I disassemble the carbs on my bike.

[@BeingInTheMessiah]

Best explanation of all the pertinent details available. Thank you sir.

[@hocuspocusjokerride]

this guy nailed it, very nice video, i came here looking for an answer about something, and i got it, nice job!!!!!!!!

[@EngineeringExplained]

Seems like you could do it, I'd do some searches on forum/KZbin to see if someone's done it and see what all is involved. Good luck!

[@nedsmith6283]

This couldn’t be improved on, a perfect explanation. Thanks

[@EngineeringExplained]

Thanks, I enjoy your passion haha

[@kavishanmrathnayaka5610]

Wow man!! You just saved my exam thanks mate

[@muaddib420]

Nice video bro. I'm thinking of getting an old jeep wagoneer and this wins helpful when I tinker with it

[@Indian-Canadian]

dude....u should have been a teacher in an university.....we need loads of teachers like u in our engineering colleges in India....

[@leedo03]

I'm taking fluids right now and this makes so much sense! thank you!

[@CristianDiaz-tg1pj]

This is wonderful. Never stop learning!!!

[@shivaprasadgv8622]

I have seen almost all the videos of yours, all are at its best. one thing i would like suggest you that, could you make something so that your voice would be more audible and clear. thank you in advance.

[@liamjhewitt1]

Brilliant, easy to understand explaination. Good job

[@justin10347]

Thank you very much on this video, I always wandered how my grandpa's pick up truck worked