This might be the single best KZfaq demonstration video I have ever seen! All I can say is wow, you have really knock this one out of the park! Major props on designing and fabricating that demo carb! The time and thought you put into the model is absolutely astounding! Bravo sir, bravo!!!

MAN! You deserve the Nobel prize award. This tutorial should be shown in all mechanical schools worldwide. Very well done.

Unbelievable. Just absolutely mind boggling the way that you built that full-size model. I’ve been tinkering with these carburetors for about 30 years not really knowing what the hell I was looking at but now I completely understand them inside and out thanks to you. I’ve watched this video about four or five times. Absolutely amazing.

I am nearly 70 and it has taken me until your unbelievable video to understand the "simple" 2 stroke carb! your printed model just blew me away! Thanks for the incredible amount of time and effort you have put into this Jay, I am forever grateful.

One can not watch this video and not leave a comment. The sheer amount of effort and detail that went into this project is amazing. This is the best video on the internet to explain the workings of a two stroke carburetor. Well done to the creator of this props and video. This should end up somewhere on a site where they teach the basics of petrol engines. Yet again well done!

This is hands down a most awesome video. The time and attention to detail is astounding. These carbs are so small, and so difficult sometimes to understand what is going wrong, but now the mystery is so clearly explained. This video should be a requirement for any one working on small engines. Thank you sir.

Dude this deserves like, national recognition. This needs to be used in any educational setting for mechanics. Best video hands down

Holy moley. That's the best carburetor explanation in the history of mankind.

This has to be the absolute best explanation I've ever seen. If I had been able to watch this 25 yrs. ago it probably would have saved me a lot of head scratching as I learned this on my own. Thanks for sharing. Love the large scale printed carb.

I'm late to the party but this literally was one of the best explanations I've ever seen. I can't believe you took the time to make that huge 3d printed model. It's all amazing work!

Walbro should adopt this video as their main (and only) tutoring source to educate their engineers. I am a retired computer engineering prof from a local university, and I can vouch that this is an amazing piece of work done by Mr. Gould. I searched in the internet to get a good understanding how a Walbro carb worked because I wanted to learn about RC gas engines, but couldn't find anything substantial, just bits and pieces of info published by people who didn't know the entire mechanism. Finally, I started examining Walbro diagrams on Walbro website, trying to figure out the exact mechanism. I found out most of these diagrams were sketched for people who were already very familiar to Walbro carb, but didn't make too much sense to me (or novices that don't know too much about carbs). I am glad I stumbled across this video. Thank you again.

Those enlarged 3-D printer models are brilliant. This is the first time I got any real understanding of how the tiny carburetors on 2-cycle garden equipment work. Lots of repair-tip videos out there, but nobody else takes the trouble to give the overview and explain the details of the fuel delivery cycle. For those who want to understand what's really going on inside these little marvels, watch this. Chinese factories may be able to turn them out today for $20 (I just bought two), but it took 150 years of creative thought and engineering to design and develop them. Appreciate that the next time you pull that starter cord.

This should be the gold standard for any You Tube instructional / tutorial video. You have done a great job explaining in very clear terms and your 3d prop is an absolute work of art. Thank you for sharing this video.

That is the coolest 3D print I've ever seen!

Can you imagine having the knowledge, curiosity, tools, skill, and eloquence to be able to complete a video like this? I’m blown away and if this creator hasn’t already been snapped up by a major hardware company I’d be very surprised.

I must watch this a few more times to let it sink in fully. All my life I have been almost blindly opening up carburetors and trying to get then functioning again. Sometimes with good results and sometimes with failure. I'm 62 now, pity I didn't know all this when I was 22. But however I have a walbro fueled chainsaw that dies out when accelerated and perhaps I can put this information to good use tomorrow. Thank you very much for this most informing tutorial !!

This video makes me realise how 1 jet, 1 tiny hole blocked will not allow start up. Thanks mate you're a legend.😂

Thank you for taking the time to make a large model carb and explain, in plain language, how the fuel flows in a 2 stroke carb. The carbs are not dependable. the slightest contamination can affect its operation, thus they break down frequently causing frustration. Hopefully the DIY can defend themselves with this knowledge and be able to repair it. God Bless

Awesome! This is the best teaching video on you tube. Straight to the point with no unnecessary ''Fluff' and no beating around the bush. No distracting background music. Appreciate all the work in 3D printing the parts. YOU TUBE, are you listening or seeing this? -GIVE THIS GUY AN AWARD.

This must have taken you so incredibly long to make. I hope it's some satisfaction knowing you have taught a complete newbie so much in 20 minutes. Thank you thank you thank you!

As a former Auto Tech instructor at the college level, That was amazing.Not only did you answer every question I had, I learned more. You also kept my attention going to gain more knowledge. I loved the props you used. Well done sir.

I just HAVE to comment again! I knew virtually nothing about my gas string trimmer until I watched your video. Now I feel that deep dirty carburetor secrets have all been revealed. I understand what makes it tick!!! Thank you so much!

You deserve an award for this video, the models, and attention to detail in explaining the workings of a small two stroke engine carburetor. WELL DONE! VERY WELL DONE INDEED.

Amazing show and tell. You are an amazing teacher!! Anyone lucky enough to have been been a student in any form has been truly blessed. You are a hero.

A phenomenal lesson in chainsaw and weed eater carburettor principle and practice. Your models and props are better than anything I have ever seen before as teaching aids and your knowledge and calm systematic explanation is easily understandable. The preparation invested in this short class is mindblowing. Thank you so much, if I had received tuition of this quality at school it may well have changed my life.

This guy deserves one of those film awards they give out in Hollywood.

I wish I had seen this earlier, it would have saved me from watching dozens of other videos. Best tutorial ever!!

Absolutely fantastic tutorial and 3D printed models! I'm Technical Director of a company that manufactures 3D printers and the time and effort put into Jay's 3D models is enormous, hours and hours of work needed to design and produce these models. Jay, you're a credit to engineers everywhere and your tutorial is 5* Thank you! PS. I repaired my chainsaw because of your detailed explanation of the debris gauze at 6:42 on the tutorial - mine was so blocked up that I thought it was a 'plug' and not a 'gauze' which it proved to be after closer inspection and cleaning !!

Simply incredibly technical content…the level of detail in the magnified model and cross sections truly there comprehension of the integrated system for even well versed individuals. Thank you so much!

Wow! This was the best description I've ever seen. You just made me a smarter man. Now when I have carb problems I'll know exactly what to look for!

There are tons of KZfaq videos about how a two stroke carburetor works, but this is by far the best one. That upscaled model is a great help to understand the principles . Thanks a lot !!

I cannot appreciate enough the effort you have taken to explain the operation of 2 stroke carburettor. Amazing work. This is a 'gold standard' training video.

I could write a page full of accolades and praise for the work you put in to create this video - Or just simply say, Thank You so very much!

You need to be cloned so you can teach all over the world. That was just fantastic. Thank-you

Thank you. I've been stripping these down for a couple of years on my garden equipment and just cleaning them the usual way and blasting through the holes with carb cleaner and compressed air and fitting new consumables, then most of them work , but now I've got a difficult one to fix where that's not worked and after watching this, I know where the problem is likely to be. This weekend, I'll be out there taking a closer look in the affected area. Update after a bit of time on the healing bench, its fixed !! The idle jet passages had a partial blockage

Now he needs a giant 2-stoke engine to complement the giant carburetor. Seriously though, this is an AMAZING explination on how a diaphragm carburetor works, without the need for me to take apart mine and then never figure out how to rebuild it. So thanks for your effort on making this whole video man!

This is what a demonstration should be like. Thank you Jay Gould. Your 3 D Printed Carb is fantastic.

Thank you so much for taking the time to explain in normal language and make 3D perfect example!!!!!!

Jay Gould, you are a student of the game sir. I have a fair idea of how much went into this, and I am truly impressed. Well done.

All I can do is to agree with all the other comments. This is a fantastic tutorial. The large scale demo is a work of art in its own right and the crystal clear explanation you provided with it makes this video one of (if not the) best I have ever viewed. Thank you and well done.

So glad I clicked on this video. I think I might be able to get my 2 stroke working again, thanks for making and posting this video.

I've had a general understanding of and worked on small engines/carbs my entire life but have never seen such a comprehensive explanation and so efficiently done. This was flawless. Nice work 👍

I have watched many u tube videos from different channels that either do not really explain why they are doing something or show a very basic understanding of why they are doing something. But your clear explanation of basic principles is amazing. If only other "EXPERTS" demonstrated such depth of understanding as you obviously have.

This may be the finest video I've seen on KZfaq. Thank you for spending what I'm sure must have been countless hours to do this.

Amazing!!! Your the best. i have never left a comment, probably never will again. If i had money I would pay you. I have spent hours watching carb videos today. I do not need to watch anymore this is all anyone needs. Excellent, absolutely Excellent Thank You.

I'm like 5 minutes in and over paused the vid to write this and say you are a legend! That 3D model is incredible and the way you explain how everything works is so easy to understand. Thankyou so much dude!

I think we need to vote you as the best you tube instructional video of the year,what else can you teach with your over grown visual aides

Not only do you understand and explain carburetors very well, but you are an artist making those models! Many thanks!

If this gentleman had been a teacher when I went to school, there is no doubt that I would have payed better attention. I had subscribed before he had the small carburator laid down on top of the 3d printed large one.. I thank you for this

Best teaching video I've ever seen on any level and I've been doing this for over 30 years kudos To this guy you can't ask for anything better than this you can't even pay for classes this good

Thanking you very much for this explanation and thank goodness you have a 3d printing hobby to make demos easier to understand. Glad you took the time!

Excellent Teacher. Plain, articulate, zero “filler words.” As for the demonstrative you’ve created? It’s hands-down beautiful. Seriously well done Sir. Your passion is contagious and inspiring.

Absolutely amazing. I am a time served mechanic and this video has helped me understand these marvel of a carb finally. Brilliant

Your model making and understanding is unsurpassed

I totally agree with "The Lawnmower Lady" and "David Mansfield". Your desire to educate others on something that is very hard to find information on is astounding, and your attention to detail and accuracy is almost beyond belief. I want to thank you for your efforts. I plan on using 2-cycle carburetors on 4 cycle engines, because the 2-cycle carbs can be set up as down-draft instead of the normal side-draft, allowing a longer intake manifold for added fuel mixture velocity. I was concerned with how to operate the pulse fuel pump, and to complicate matters, I confused the fuel metering diaphragm as the fuel pump. I plan to use a stainless steel tube inserted into the exhaust manifold so that the high velocity exhaust gas will create a vacuum in the SS tube which will go the the fuel pump pulse tube/entrance and pull the diaphragm against a spring to complete the push-pull action. After seeing this video, I now know that I can do it. Thanks again!

I’ve been teaching for almost 30 years. And this demonstration is just epic! Unbelievably good.

Самое наглядное пособие по работе мембранного карбюратора и лучшее, что видел в интернете, благодарен автору за его творчество и обучение.

You put my faith back in KZfaq training videos. Awesome detail. Your explaination of the fuel delivery solved a lot of mysteries. Also, don't forget the other 2 holes under the welch plug for the low speed side are progression ports. They bridge the gap between the low speed (idle) and high speed. Thank you for an outstanding job. Cheers

Wow, just wow. Thank you for the best explanation of the workings on how these carbs work. The 3d printed models and your clear explanation makes perfect sense. You really should be commended, thank you again

Well that was as good as any carburetor lesson as I have seen in my four decade career! Thank you. Also, yes I subscribed

Durn! I've been rebuilding carbs for years and this is the best break down I have ever seen by far. It has given me a new understanding of things that can go wrong and how I might fix them. It also lets me see what I should expect to see when doing things like squirting carb cleaner in the various holes. Walbro carb are very common and the clones work just the same with minor variations. I owe you my thanks. Next time I lift a brew I'll toast you.

Thank you! I've never really understood what was going on inside these little mystery boxes. This is an amazing video.

More people need to see this video. Your illustration is wonderful!! The model you made must’ve taken a very long time to make but was well worth it!! I hope there are other videos with different types of carburetors on your channel. I believe you have explained this very well. Thank you

Jay, your dedication to getting this right is truly exceptional. Nice work and thank you for helping me understand the black art of the 2 stroke carb!

This is absolute the best teacher of 2 stroke carburator detail's. Please let me know where i can donate. You deserve it. Thank you so much for all your effort to teach us🙏

Ya, as others have said this is the best cutaway and explanations of small engine two stroke carbs I think I've ever seen. Really good job, you really took some time to do this.

Absolutely brilliant! The model is fantastic and this video helped me finally understand how these genius little carburettors work. Thanks Jay?

This is the coolest thing ever! I basically knew how a chainsaw carb works, but the fact that you made a giant model is so awesome! The cut away of the tuning screws is particularly interesting for me. Edited to add: EVERTHING is perfectly color coordinated too, even the shiny crome metering side cover!! I can't believe it.

This is the most incredibly descript demonstration of how something works that i have ever seen... unbelievable! And the amount of work that went into it is even more incredible. This will always be in my favorites because i work on these just enough to get me into trouble and always need to refresh my knowledge on how these work. WOW

Best educational video ever, thanks a million to the creator.

The way you made the enlarged parts and cutaways is amazing. It really helps to understand the different parts and the way it works..

You are a legend and deserve a medal. Thank you for the time you put into this. When you pulled out your printed model I was floored at the level of detail and construction. Thanks to you I now have a better understanding of this highly complex part.

Awesome job! Thanks for the explanation! I’ve rebuilt several of these carbs but never knew how they worked!

This KZfaq video was by far the best explanation of 2 cycle carbs of how they work and gives you an internal view from start to finish. I applaud the person who went to all the work to make an upscale size of the carb, this must have taken alot of work to get it to scale and so real like.Thank you for you time and effort in such detail.

Sir. This is the EVER best Walbro carb demo I have ever seen. Thank you so much for a fantastic excellent demo job.

ABSOLUTELY OUTSTANDING!!!!!!! You are the man. Very well done and opened my eyes and understanding on 2 stroke carburetors. Thank You.

Amazing! The 3D printed model(s) are a work of art that give all us visual learners a clear picture of the how the Walburg works in intricate detail. Thanks

You are a natural teacher with 3d printing technology to aid you. This is an excellent video now I know how this mysterious device works. I know snowmobile carburators and have disassembled them countless times but this video is the best at explaining a chainsaw carburator.

I had asked "how a two cycle carburetor works" and buddy you nailed it. The large model helped a lot. Thank you Jay.

I really can't think of enough good things to say about this video, but I'm sharing it with all my buddies.

I knew bits and pieces of how it works, BUT this explanation and the cutaway model, your detailed explanation cleared up a lot of grey areas I had for years. I'm angry that I've spent so much time in years past watching videos without the detail that you presented. This video should be the number 1 search result on YT. Thank you for your efforts and what a fantastic model you made for this!

This is amazing! The level you have gone to to make a functional 3-D model to help explain the process is phenomenal! You attention to detail is amazing. Thank you so much for explaining this. I now understand better how to troubleshoot, maintain, rebuild, and adjust these for any 2-stoke carburetors on any of my equipment. Thank you so much!

Wow! You are a 3d printing legend!! Thank you so much for taking the time to make such a detailed video. I really appreciate the time and effort spent making this demo. Thank you!

Wow. That’s the best explanation I’ve ever seen. What an awesome job you have done explaining the hole process. And an awesome job on the 3d enlarged models to explain the operation. You should get a gold medal for it. Extremely impressive. Thank You

You have created an amazing video that includes the well explained operation of the diaphram (pumper) carburetor, again an amazing video!

Wow, brilliant models and presentation! I just got a one-on-one class in 2-stroke engine carburetion! Thank you!

awesome! The amount of times i have pulled apart that exact carb on my strimmer and just basically cleaned and blown it out withouf efer really understanding the flow.......and finally thanks to you i do now.

The Gas remote control , cars, planes , helicopters and boat enthusiasts would be astounded to know this much knowledge and they could completely appreciate the detail of skill your work and explanation efforts you have gone too. Thank you and God bless your talents you share. Wow...

Fantastic explanation and awesome 3d printed model!! Those little carbs are quite complicated. Whoever figured all that out was pretty smart. Thanks for the video

All I can say is WOW! That is amazing. Thank you for putting all of that effort into this model. I will never be the same again.

Extremely well done. You take teaching to a new level with that 3-D printed model. I now know where to look to solve my chainsaw carburetor "fuel leak out through the exhaust port while sitting and not running problem". Thank you.

Dang Jay, This is just fascinating! I applaud you for your dedication and the 3-D version is spectacular. I'm working on just this type of carb right now. It is great to understand it more thoroughly. Thanks very much.

You sir, are AMAZING! To be able to print a model carb to show the fuel and air paths is just incredible. Hands down, the best I have ever seen. I feel like an expert now! THANKS!

Very very clear and concise! Your models are meticulously detailed and i know you spent a long time on them. Thank you for making this video. I've been working on small engines for quite a while now and you taught me a lot I didn't know

I’m more than impressed by the level of effort and perfection that went into this model and the explanation. I’ve spent plenty of time working on these carburetors and I learned a few things.

THIS IS THE BEST VIDEO EXPLANATION FOR THE SMALL ENGINE CARBURETTOR 2 STROKE I HAVE EVER SEEN. A LOT OF DEDICATION AND PASSION WERE IN PLACE. THE BEST INSTRUCTION EVER.

this is a awesome video. The clearest description i have ever seen. I would recommend more people to review it. This also helps me to understand the fuel lines routing. thanks!

Excellent job. I love your large model with several breakouts. It makes it very easy to understand how the carborater works. 👍

These are "Demand Regulator" carburetors. They are not necessarily specific to 2-cycle engines. Tecumseh made tens of thousands of four cycle engines equipped with them. The 1958 Brown carburetor was the first of this type. The literature on them mentioned that they were a simplified Bendix RSA aircraft pressure carburetor. In 1960 Tillotson bought the rights to the design. In about 1968 Walbro began manufacturing these "diaphragm" (as opposed to "float type") carburetors - and they worked really well. One reason they worked so well was that they incorporated a "main fuel discharge check valve" to prevent air being sucked in the main discharge when idling. For years nobody minded air being sucked in the IDLE discharge when the main was pulling high suction. Later Walbro and others (many if not most carbs used on Stihl) incorporated idle discharge check valves as well. (To my knowledge no idle check valves were intended to disassembled and repaired) A big problem with these carbs is the diaphragms become stiff and "oil can" in and out taking a set first one way and then the other. Walbro now has kits to retrofit clear diaphragms guaranteed to never stiffen (but they must be used with a matching super thin spring steel flat spring - it comes in the kit) Hardly any mechanics know that you should know how to check the piston rings, cylinder base gasket, crankshaft seals and even the reeds/piston skirt valves for air leakage if your initial disassembly and renewal of gaskets and diaphragms does not yield good running. It's like this kids: 1) Compression (which includes crankcase compression!) 2) Ignition - which includes spark plug. 3) Then if you have an engine with a dry carb in place that also EAGERLY burns it's prime - You can get it wound up and un-pinch the fuel line and see if you can get the carb to take over from the hand (squirt bottle) priming that you are doing. YOU ARE WELCOME

This is the best video I have ever seen about the demonstration of working of a carb. It is so very well explained. And the time and effort you have put in to 3D print the model and its corss sections just blew my mind. I am really very thankful and appreciate your time and effor that you have put into this single video. Simply fantastic !!! Thank you !!