How the 2-Stroke Engine & Carburetor Work Together! (by Craig Kirkman)

[@TheRepairSpecialist]

Hi guys I just wanted to Introduce to you my other Channel "Kirkman's Academy" - which i'm just getting started. It's a go-to channel for simple explanations for hard to grasp subjects such as physics, maths and chemistry etc. Here is the link: www.youtube.com/@kirkmansacademy/videos . Thank you so much for looking, and if these topics interest you then I hope to see you the there. Many thanks indeed. Craig 😊👍

[@animeanibe]

Explained what I've been wondering all my life in a matter of minutes. Amazing!

[@typeppernell4132]

this is by far the best video ive watched on this. cleared up so many questions I had. Thankyou

[@amalfi460]

Wish my teachers growing up could get their point across as well as you do sir

[@ahobimo732]

WOW! This is fantastic! A teacher of mine once said that the best indicator of how well you understand a topic is your ability to explain it clearly to others. By that metric, you understand 2-stroke engines better than anyone I've ever met! Equally impressive is the fact that you've illustrated a complex, dynamic process using only paper and colored markers! OK, maybe a straight edge as well. ;-) Although price might not have been the determining factor in your choice of methods, it still goes to show that imagination and diligence are often more important than having the best, most expensive equipment.

[@mvmcali6900]

Tremendous explanations...perfect balance of detail and simplicity.! Love the detailed explanation

[@victorheifetz7141]

what a clear explanation! beautiful!

[@shaggyda2758]

I agree, the video is 'It'

[@TheRepairSpecialist]

shaggy DA. Thank you for your comments, I really do appreciate it

[@outbackenduro7418]

EXTREMELY well explained, what a great contribution to all of us thank you

[@ManfromVega]

I've watched dozens of videos about the two stroke engine, trying to understand how it works. And i managed to understand it, but then i came across this video, which is by far the best way it has ever been explained. Such detail and in lamen terms. Thank you soo much!!!

[@gregmelton9355]

Cogent, clear, concise with very nice visual elements. Thank you so much for this presentation!

[@TheRepairSpecialist]

Thank you so much for taking the time to write this really nice comment. I really appreciate it and it keeps me motivated to continue making videos. Craig

[@oppanheimer]

Best explanation/illustration I've seen on 2 stroke operation. Thank you sir.

[@geojor]

the best on youtube, congratulations on your hard work to put these videos for the DIYers ...

[@athhud]

I wish you were my instructor for every class I've ever taken. The way you illustrate and explain works exactly like my own mind. Great job! Honestly, I thought I knew pretty much everything there is to know about 2 stroke engines, but it seems that there is a little fact in everyone of your videos that I'd never considered. For instance with this one, I had no idea that air/fuel was transferred from underneath the piston to the top of it. I always assumed that it drew air in through the intake on the down stroke like a 4 stroke engine. Thanks for sharing your vast understanding of this topic!

[@TheRepairSpecialist]

I'm really pleased it's helped, as always thank you so much for your kind feedback!😃

[@susanl3136]

Thank you for your videos...I have many people in my life who like to fix things FOR me, and none who really have the time to teach me. I just purchased a used fs90 Stihl Weed Eater, and right away am having problems. I have decided that it's time to start learning about how engines work, and your videos are immensely helpful. Thanks you!

[@nathansegurakennedy8607]

That was phenomenally illustrated! I understood this on the first time watching and learning. Great work m8

[@ktk3062]

Ohh it says mate lol I’m slow ✌️

[@youpattube1]

A very clear explanation. All that work making the drawings paid off. Thanks.

[@raymondfisher6178]

Wow! Best 2 stroke explanation I’ve seen. Very helpful. Thanks!

[@Raja-kk1zi]

wow ...very clearly explained ...what I got not understand by studying in classes and watching some of videos...was ... clearly explained and very easily understood.thank u for this wonderful stuff

[@TheRepairSpecialist]

pushparaj 666, wow, your feedback is very motivating for me, thanks so much

[@joshuasanborn46]

The best explanation I've ever seen on the subject!!

[@TheRepairSpecialist]

Wow, thanks!

[@Guarrdian1984]

Terrific! I daresay you've got the best explanatory videos on this topic internet-wide!

[@siskiyouwoodsman4279]

You sir should be teaching this at trade school level as your illustrations and explanations are unparalleled. I suspect you’ve already made a great difference in turning parts changers into true diagnostic technicians. Well done 👍

[@luksurias]

Beautiful explanation. Thank you.

[@M0ntaroo]

once again, a 1 million view video..........just brilliant

[@TheRepairSpecialist]

Thank you for the positive feedback, I really appreciate it. Thanks

[@CaleyCreations]

I'm just about to take delivery of a Stihl cut-off saw and was a bit worried that my lack of engine knowledge would hamper my maintenance/repair attempts, but this is an excellent video demonstrating not just the engine, but the carburettor too. It's actually very similar to premix burners in gas boilers which I used to work with so quite easy to relate to it. Many thanks :)

[@samjohnson466]

Now that was a great explanation. Thank you. well done, sir.

[@etcetera3545]

Best explanation of anything I’ve ever seen

[@dusty6345]

Who would dislike this video? Thank you brilliant man with an accent! Uh bravo. You should make a video/ imagery on how the heart works. We could use your ability to teach in nursing school.

[@BR500]

Honestly the best 2 banger engine explanation on youtube

[@hikeoganessian9729]

Thank you..Someone finally answered my question, of what force causes the piston to go up.. You made it quite clear..thx again...

[@bonnie-voyage1005]

Great explanations. Thanks for taking the time to explain and upload.

[@Jager_meister]

Great, thanks! Now let's try fixing that weed eater that was flooding...

[@TheRepairSpecialist]

Awesome 👍

[@frankgibson8861]

thankyou so much i always wondered how a 2strock worked first class explanation sir .

[@goneviral6037]

This is the best explanation I have ever seen on all of KZbin! And I have watched a lot of explications!!! ❤❤❤❤

[@TheRepairSpecialist]

Wow. That’s some of the best feedback I’ve had. Thanks you. I really appreciate it. Craig 👍

[@croft628]

the best explanation i have ever heard about carburators ! Thank you

[@TheRepairSpecialist]

croft628, thank you for your motivating feedback. I really appreciate it

[@samazd4015]

Great video. All my questions about how the carb works have been answered thank you

[@derrickclark5510]

Genius!!! I love engines!!!

[@TheRepairSpecialist]

Awesome, thank you so much 👍👍👍

[@dineshr93]

Thanks for the knowledge share. I now know how all the pieces work together. This is masterpiece. this new well intact closely knitted working process of the engine has reduced movement time of humans drastically and benefited our humanity of this decade.

[@victormedel3293]

What an extraordinary explanation sir my respects!!

[@oviedoc5454]

Thank you. Very clear, comprehensive and intelligable.

[@PATOUH2]

Best explanations of 2 strokes

[@TheRepairSpecialist]

Thank you so much :) -Craig

[@cheapsmoke4096]

Wow what an incredible illustration and explanation

[@TheRepairSpecialist]

Thank you for your nice feedback. I really appreciate it. Craig

[@walterschneider7580]

Excellent video. Very easy to understand. Thank you.

[@hichamnabilnabil]

thank you very much..such a beautiful explanation

[@TheRepairSpecialist]

You're most welcome. Thank you 👍👍

[@mustanghunts]

Thanks for taking the time to explain this....Fantastic!

[@gregb.5796]

You are wonderfully articulate.

[@TheRepairSpecialist]

Greg Brannan, thanks so much for your positive comment. I really appreciate it

[@michellemaiben4619]

Perfect explanation. Easy to understand.

[@balasubramanian4314]

Thank you sir for clear explanations. If one understood about human heart chambers pushing the blood to diff. Chambers. Same logic of heart lung mechanisms... god is great..

[@mizanurrahman5800]

Best explanation so far. Thanks a lot for good work.

[@IceAngler]

this is brilliant. thank you for the perfect explanation.

[@TheRepairSpecialist]

TotalBogie thank you for your positive feedback. I really appreciate it.

[@bdhelms54]

Thanks for your time to explain how 2 stroke carbs and engine works.I really enjoy your drawings that help to understand the operations. Have you consider doing the same thing with a 4 stroke carburetor and engine.

[@TheRepairSpecialist]

bdhelms54, hi, thank you for your feedback. Yes, it's on my agenda to include a four stroke vid of this type. Im just in the middle of a few other vids at the mo but I will get to it asap. Thanks

[@brentwejrowski]

exactly what I wanted to see! this is fantastic. Really awesome drawing =)

[@paulwharton1850]

Brilliant ! Thank you - I learnt a lot.

[@WallytheRapper]

Well explained.. thank you

[@townrowclark3797]

Thank you for such a clear explanation. 👍

[@susanlassan6706]

This was very helpful, and very well done! Thank you :)

[@TheRepairSpecialist]

Susan Lassan, thank you so much for your positive feedback. I really do appreciate it.

[@markward251]

brilliant, thanks. that were really, really good!

[@tndlawncareservices9831]

Thank you so much for these wonderful educational videos!

[@lukebailey4755]

Great video, very helpful. Thank you!

[@jarkkolaurila3534]

So good video! The drawings are beautiful. English isn't my main language, it's finnish, but I still understood what you said and I now have an idea how the engine works. I'm getting a Beta RR 50 super motard track when i turn 15.

[@Sahkopekka200]

Can you make a similar video for high performance 2 strokes (like for example a motorcycle engine) with slide carbs, proper exhaust systems and port timing in more detail? Somebody might want that too but I really like the simplicity of this video! :D

[@ronaldomeivogel6777]

Good explanation

[@lupedelacruz4152]

Very nice amigo so that's the Reed valve on top of my 2-stroke cs-400 chainsaw that's why it wouldn't stay on correct cuz it was off thanks again

[@Rabb865]

Yoh are brilliant sir what an amazing teacher you are thank you for this

[@AntonioR1981]

Congrats!! Excellent video

[@curseofa5r5a]

By far the best video on the topic

[@TheRepairSpecialist]

Thank you so much for your nice feedback. It's comments like yours that motivate me to continue making these videos. Craig 😀👍

[@curseofa5r5a]

@@TheRepairSpecialist I just want you to know that your effort have a positive effect on people's lives, I am a automotive mechanic but things are slow in my country due to the pandemic, just landed a job fixing small engines and I been binge watching all your videos on this platform, if I ever last in this job doing something I wasn't trained for and putting food on the table it will be thanks to you, best wishes, Cristian

[@austinmeyer9100]

fuck this guy is good a teaching. learned more in that 10 min video then i did in 4 hours yesterday trying to figure it out

[@TheSammieGuy]

Very clear explanation! Thank you!

[@oussamacheta7106]

i'm sure it took a lot of effort making this video thanks so much it's better than 3D animation !!

[@gavinwallace7083]

Awesome video!

[@hercegmj]

Awesome video.

[@TheRepairSpecialist]

thanks again for your generous feedback, it all motivates me to continue with these videos.

[@G224tnar]

Excellent video, well explained and demonstrated. Liked and subbed

[@steven36097]

What a great explanation! Thanks, it helped me a lot!

[@TheRepairSpecialist]

steven36097 thank you so much for your positive feedback. It's comments like yours that keep me motivated to continue to put these videos on my channel. Thanks again. Craig

[@steven36097]

I just started on a Marine Mechanics course and I still have to work on my english skills, so I wasn't getting it at all with the manual, that's why this helped me a lot. I'll be around your channel a lot lol. Thanks to you again.

[@simonrichards7259]

fantastic explanation. thank you

[@thearboristangler4715]

Awesome explanation

[@tredner1990]

Very educational and interesting

[@alonsogarcia6518]

What a video. Great job man

[@stevew3882]

Great teaching!

[@runnervxr210]

Really great video

[@TheRepairSpecialist]

Glad you enjoyed it

[@gregrichard9192]

Great explanation 👍

[@williamcartwright638]

Very well described Thank you

[@tsmithp69]

Really good explanation. Thanks!

[@garybowers2629]

Great explanation thank you

[@DButch15]

Beautiful. Thank you so much!

[@RedstoneWolf531]

Great explanation! My question is why doesn't (or how does) some intake air escape through the exhaust port when the piston is rising? Because the piston is "compressing" the air but yet it has a place it can go: out the exhaust

[@TheRepairSpecialist]

RedstoneWolf, hi, yes, the short answer is that some does escape, which is why some more advanced two stroke engine have exhaust valves fitted to the exhaust port area. I will make a video explain this. I realise that I should have mentioned this in this video. Thank you for your feedback.

[@ronsbeerreviewstools4361]

Thanks for this post , its very informative.

[@Kotikjeff]

First class lesson

[@tomtom1484]

Perfect explanation! Thank you!

[@TheRepairSpecialist]

Thank so much

[@alantaylor6691]

Terrific, thank you.

[@nainka11]

Thank you and Well done.............Just bought a Honda SGX Sky.............which was all running fine and sounds light a sewing machine..........Then after wizzing about locally and doing less than a mile.....the recs remained higher than usual tick-over,...............Had a look and tried to find the fault, assuming it would be a simple throttle sticking..............Whilst it is the case the revs stick .............it also has a problem when left standing ............the engine appears a little erratic............Now wondering if it is the reed valves...........having had the carb off and found nothing unusual............So apart from another strip down to check the reed valve..........I am thinking some kind of air leak...........or the auto choke..........but I will have another look at the throttle valve (although it does appear to be seated at it's lowest point correctly) Problem being here the air box is a lot of work to remove and may give a false reading, by drawing in excess air...........Any ideas ?

[@TheJosh1022]

Excellent video

[@TheRepairSpecialist]

Thank you very much!

[@liemnguyen140]

Very good video. Can i ask a question is it possible to drill a hole in the very old engine that does not have the hole to help with installing a modern carburator that have a hole that its function is to use the pressure differences in the engine to pumping the diaphragm? Thanks.

[@amina-pf1bs]

thank you so much craig!

[@Kutkornersmasta]

Great video thanks a lot!

[@tomeyles3520]

excellent, if you are not a lecturer you should be. clear and concise.

[@mattm6430]

Well thank you so much for putting so much effort into this vid. Those illustrations must have taken some time and it was very succinct. I'm trying to learn how to maintain/repair my own gear and this is great. Your previous video on carbs was really good too. Can you give me your thoughts on non-genuine parts? I have picked up a number of well used stihl tools 2nd hand and they need new gaskets, carb diaphragms, air filters. Stihl parts are known to be expensive but they seem to be even more so in Aus (I have seen carb kits go for less than a third of the price overseas). I am sure there are bad 3rd party copies but are there lots of decent ones that have a better performance/price ratio too?

[@TheRepairSpecialist]

Hi, thank you for your kind words, they really do encourage me and help give me the confidence to continue including other videos. As for the parts, I agree with you that genuine parts are very expensive indeed. I have always recommended that if you aren't a professional landscape gardener, for Instance, who use their equipment more or less every day, for hours on end, but rather once a week on your own garden, then yes, none genuine parts should be fine. I have several garden machines of my own that I only use on my own garden each weekend and they have been ok for the last few years even though I have used none genuine parts in them when I rebuilt them back then. Of course there are varying levels of quality regarding none genuine parts but finding which one is the best is really trial and error, in my experience anyway. If you were a pro gardener using your machine everyday then I would recommend genuine because they are generally much more durable in the long run, in my experience anyway. I hope this has helped Many thanks indeed Craig

[@jbbolts]

here's a quick translation into layman's terms...it's MAGIC!

[@jbbolts]

seriously though it's utterly fascinating that all this cycles hundreds of times per second... mind boggling

[@timdavanzati7510]

🙏 thank you

[@TheRepairSpecialist]

You are so welcome

[@souldrinker7008]

Fantastic video once again! I'm studying a mechanical engineering BTEC so this is very helpful. I recently bought a 2 stroke engine just to take apart (thought a 2 stroke would be a good place to start as they are so small and simple, relative to a car's engine at least) , and I'm pleased to say I managed to rebuild it and it still works a treat, so it's nice to have the theory of operation explained so clearly. If you don't mind me asking; what's you're training and experience? Are you an engineer or mechanic?

[@TheRepairSpecialist]

Hi Thank you for your kind comment. As for my background: I started working on two stroke machines, as a mechanic, in 1988 during my school holiday leave. I was taken on as an apprentice mechanic in 1991 and undertook a 4 year 'maintenance and repair engineering' qualification at College, which was combined with block release where I alternated between College and my job. In 2000, I undertook a science BSc hons degree, where I learned the in depth workings of things on a molecular level. I have since tried to combine the two disciplines to try and present an understanding to others. I have been working in the industry since I was an apprentice. I hope this helps, and thanks again for your comment. Craig

[@TheRepairSpecialist]

I meant to say in my last message that it's great news about your BTEC Mechanical Engineering course, which must be an amazing subject to learn. Well done with your rebuild of your 2 stroke engine also. I hope all goes well for you and you become qualified and have a very succesful career. Thanks Craig

[@souldrinker7008]

Thanks for your reply's. At only 19 it's difficult to comprehend how I could ever have the knowledge to become an engineer or mechanic one day, so your videos and knowledge of your background is invaluable. Thanks again!

[@TheRepairSpecialist]

Thanks again, and I know that you will be great at your subject because i can tell you love what you are doing, and you are investing your own time in learning. You remind me of what I was like when I was your age. As you know, learning never stops though and I'm probably learning more now than I ever have. So get out there and be the best, your hard work will deserve it.

[@souldrinker7008]

Thanks very much for the encouragement, and I look forward to your future videos - you're a fantastic teacher!

[@hpds1145]

Great video! Really helps my understanding of how this works together. Is the one-way valve that opens when the vacuum is produced (8:11) located in the cylinder?

[@tommyandtammy1]

Excellent Video God bless.