How CHAINSAW CARBURETOR Works - Chainsaw Carburetor Explained!
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- Опубліковано 29 вер 2024
- The Chainsaw Carburetor How it Works
This Fascinating Video Effortlessly Explains the Inside Workings of the Two-Stroke Carburetor for a GREAT UNDERSTANDING.
- So let's begin: The two-stroke carburetor is a little but complicated mechanical marvel that powers the chainsaw, an iconic equipment in the worlds of forestry, landscaping, and outdoor upkeep. This part, which serves as the engine's core, is in charge of supplying the ideal air-fuel ratio required to operate the chainsaw's two-stroke engine at high revs. In this investigation, we'll take a deep dive inside the two-stroke chainsaw carburetor's inner workings to discover how it actually functions.
1. Air Intake and Filter: The chainsaw's air intake system is where it all begins. An air filter is used to draw air in, keeping dust and other material out of the carburetor. For an engine to run properly, the air filter must be clear and clean.
2. Venturi Effect: The air flows through a vital part known as the venturi as it enters the carburetor. The airflow is accelerated by this narrowed area of the carburetor throat, which results in a low-pressure area. The fuel must be drawn into the airstream using this Venturi effect.
3. Fuel Reservoir: A fuel reservoir or float chamber inside the carburetor houses a supply of liquid fuel, often petrol. A system of needle and float valves controls the fuel level. The float valve opens when fuel is used up, letting in more fuel to keep the level balanced.
4. Fuel Atomization: A calibrated jet draws fuel from the reservoir through the low pressure produced by the Venturi effect. In order to ensure full mixing with the fast-moving air, this jet atomizes the fuel into small droplets. A homogeneous and flammable air-fuel mixture is the end result.
5. Adjustment Screws: The majority of carburetors have adjustment screws that can be used to fine-tune the air-fuel ratio. While the low-speed screw regulates the idle mixture, the high-speed screw modifies the mixture for full throttle operation. The performance of the engine must be optimised by these changes.
6. Reed Valve: A reed valve is positioned between the carburetor and the engine's crankcase in some chainsaw carburetors. The reed valve controls the flow of the air-fuel combination, ensuring that none of it runs back into the carburetor.
The well-mixed air-fuel combination is brought into the combustion chamber for combustion and ignition. Here, the spark plug ignites it, causing a strong explosion that powers the chainsaw's piston. The chainsaw's cutting chain is propelled by this mechanical process, which converts chemical energy into mechanical labour.
8. Exhaust System: The engine's exhaust gases leave the engine through an exhaust port after combustion, restarting the cycle as the piston completes its strokes.
An essential part of a two-stroke chainsaw that ensures the engine obtains the proper ratio of air and fuel for dependable and efficient performance is the carburetor. To obtain peak performance and avoid problems like fouled spark plugs, overheating, or excessive fuel consumption, the carburetor must be calibrated to produce the ideal mixture.
The two-stroke chainsaw carburetor is proof of the meticulous engineering needed to power these amazing equipment, to sum up. It is evidence of the fine coordination of airflow, fuel supply, and combustion that allows chainsaws to flourish in the hands of both professionals and homeowners. Understanding how a chainsaw functions can help you to better understand the magic that makes it so useful for a variety of outdoor jobs.
This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle!
Craig Kirkman (Owner and creator of The Repair Specialist Channel and its Copywrited content) #lawnmower #gardening #repairing #savingmoney #chainsaw #Chainsawrepair #oil #smallenginemachines #DIY #howthingswork Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. www.amazon.co....
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The information in this description was created with the help of ChatGPT
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 😊👍
Absolutely top notch - very much appreciate the level of detail, drawings, close camera work, even audio overdubbing. Agree with another poster - perhaps the best instructional video I've seen!
I was reading Paul Dempsey's book on small engine repair, and quite frankly he lost me on the carb part. I watched your video and everything clicked. I will make sure to mention you in my Goodreads review, and how you're the perfect companion for the book.
Probably the best instructional video I've ever seen. Excellent, superb, magnificent job mate !
+Steve Wayne Totally agree!
Steve Wayne Ditto. Was gonna say the exact same thing. 👍👍
I guess he's a teacher or lecturer - it was easy to understand good pace and tone, nice one!
Yes sir I do agree
Real Thing 👌💯 Best explanation ever 💪
Excellent instructional video. Easy to understand for anyone but incredibly thorough. Very well done!
Paul Sullivan, thank you so much for your feedback. I really appreciate it.
Excellent video detailing how it works. I know these carbs clog easily with todays gas and now I will be better equipped to know where to clean and how to tune.
Excellent. Just cleaned out the main jet on my Stihl.
+James Collin
Brilliant, I hope it runs great, thanks
Thank you for this video. Super explanation of what's going on inside the chainsaw carb.
Excellent video! Very few instructional videos are of this quality!
Best explanation I've found on this subject. Good job and thank you!
Wow, it's comments like yours the keep me motivated to continue these videos. Thank you.
Very clear and easily understood. Thanks I learned a lot.
good video Sir.
Thanks.
a little note...
the weedeater carb is actually a vacuum operated, fuel pulse fuel injector !!!
good video Sir
all the best !!
Thank you very much for the wonderful information. Really appreciate.
Oh- my- goodness!!! EXCELLENT presentation!
Brilliant Mate! Your no dosser!
You have produced the most informative descriptive video i've ever seen.Keep it up for the benefit of us. Most useful. Have you thought of teaching? Here's to you! Cheers!!! Keep them coming. Ronn
Ronn Ormson, thank you so much for your positive and motivating comment Ronn. I would love to teach and keep going with these vids also. Thanks again. It's comments like yours that motivate me to continue making these videos. Craig
fantastic and easy to understand video thank you so much
I'm really pleased it has been useful for you, and thank you so much for the kind comment. Craig
Excellent! You know how to communicate very well.
EXCELLENT VIDEO AND INSTRUCTIONS!!!
Very well explain.Thank you!
You are welcome! Thank you
Wow! I understood you perfectly. Thank You so much. I will subscribe. Maybe you could explain the linkages to and from the carburetor?
g Jensen, yes that's a good idea. I will look into doing so when I have finished my next video. Thank you for you feedback
great video really well set out
Awesome explanation
That is a great video!
Bonjour
Merci pour votre vidéo où je comprends enfin clairement et simplement comment fonctionne le carburateur Zama de ma tronconneuse.thank you very much
Very well said. I like it.
Great video
very interesting VIDEO and very help full thank you
Brilliant!
interesting vid thanks!
Really interesting - super difficult to follow.....so many bloody holes and channels !
I think you're very clever.
Dittos...thank you!
dido . great. thanks
Amazing knowledge share. So easy to understand when someone explains it clearly like the author does. Awesome job.
Well Done . I was an Aircraft Technician Back in the 60s/70s/80s andwas well trained at Halton the best training a guy could get . You reminded me of the great instructors we had . An accurate and well presented explanation ..... Well Done !!!!!
extremely well explained, I appreciate you doing this video!
The best and most thorough explanation I've seen on you tube . Very well done sir, you have made this very clear and easy to understand. Hats off to you!
fucking hell, why don't you have a squillion zillion subscribers......that was intense and bloody brilliant.
Terrific explanation! Wish I had you for a teacher when I was younger! You have a voice that is calming and clearly understandable.
That was absolutely brilliant. I've learnt more about how carburettors work in the last 15 minutes than I have in my previous 65 years! You sir, are exceptional at explaining a mystical subject in a very easy to understand manner. Thank you so much for your efforts. Well done.
that's funny. I said almost the exact same thing. But I've only been around 68 yrs 😉
You sir, have made something I never dreamed I would understand, understandable. You are a gifted teacher.
Rick Franklin, than you so much for your positive feedback. I really appreciate it
Just enough information to satisfy the average absorption rate of the average mind! Very well done!
Brilliant, absolutely brilliant. Having been left a Sthil brushcutter, and no knowledge of how the engine works, this was great. Fuel had been left in the tank unused fit 3 years!
I now have the knowledge and understanding, on how and why to clean it!
Thank you!!!
Thank you for your comment. I appreciate it. 👍
sorry, but maybe you know, how exactly works the Zama C1Q carburettor (e.g. from Stihl FS 310) with an inner pump piston/plunger, which is pushed with a throttle valve's shaft?.. or namely why it doesn't work on high rpm? how to remove a "leakage" through this piston?
thanks!
This came up as a recommend video so I click on it not expecting to watch it through. But I have to compliment you on a job very well done. The video is very informative & the explanation using the diagrams made an excellent presentation.
JOE Z no
Wow, that was the best explanation I have ever heard!
Thank you!
After taking my saw carbs apart several hundred times over the course of 20 years use, I never actually new how they worked ......... Until now.
Thanks.
..
+RoryTrackrod
Brilliant, I'm just pleased you liked the vid, and thanks for the feedback.
Craig
Finally a video where it shows how these carburetor works. I've been waiting for this one. You sir earned a subscriber, thank you for your knowledge.
EXCELLENT , what a perfect video. Five stars for the professional creation. I'm now a subscriber.
That's an absolutely exceptional video! I've been trying to learn about small engines and watching lots of videos of stripping, cleaning and tweaking carburetors, but watching this has just been a total lightbulb moment! Now that I understand the fuel flows and how it works, suddenly all the other videos and processes make sense and I can see how it all comes together! Thanks so much for sharing!
I have been looking so hard for someone to explain this is detail. I'm so glad I found this video.
Sir, I can't thank you enough for producing a great video. So clear and informative. I've fooled with these Stihl carbs for years and really had no idea how they worked. Always hoping that after cleaning and reassembly the problem would just go away. Usually just wishful thinking. My confidence level is much greater now. Thank you again and keep up the great work!
Having rebuilt and cleaned many carburetors, including the very Zuma you used to demonstrate, I have loosely known these principles. This video has taken my understanding to a whole new level. Such a well done piece! Thank you so much for taking the time to make this video and for the outstanding teaching technique you used to explain things. Bravo!
Thank you so much for the motivating comment. It's comments like yours that keeps me making these videos. Thanks again. Craig.
Who desgned a carb like that?
I thought it was just fuel tank>fuel lead>ventury
Excellent - very well done!
Thank you for your kind words.
My Stihl saw will idle all day long, as soon as you try to rev it up it dies. Carb cleaned 4 or 5 times, diaphragms all OK. Could it be the flap valve not seating properly?
Hello Nick. I think if you have tried all of the above so far without avail then the next thing i would try is to ensure the carb adjustment screws are set correctly. I do already have a video on this, in step by step process, if you want to take a look to see if it sorts out your issue. You can find it here: ua-cam.com/video/74p9FLmIkkw/v-deo.html . Thanks, Craig
This the best and most sensibly explanation of how a two stroke carburetor fuel flows .Every explanation to the point...not boring or confusing .Thank you so much and Jehovah's blessing
He said "Jehovah"!
Perfect explanation. Thank you!
excellent informative video thank you, also worth having a look at the technical pages on the Zama website explaining how these carburettors work . Which are easier to understand after watching this video. The super imposed diagrams really help to explain it . There are now more four stroke chainsaws and strimmers getting about any chance of another video to explain how they work ?
If I had teachers like you I probably would have gone to collage ! Great job !
college.
@@David-lb4te It complements his sentiment
.....indeed, he is quite didactically endowed .
Awesome thanks, very detailed. I use Walbro carbs on remote control devices planes, (DLE 35) Wish they would put the primer bulb on, we have to manually prime by spinning prop through about 16 revolutions with choke. Thanks again!
Wow! What a great video, camera in focus, actually looking at the object of interest and explained by someone who actually understands how something works! What a difference from the usual half-arsed UA-cam drivel! Cheers, mate!
Great video and explanation of rout eof fuel in a 2-stroke carburetor. Helped me solve my carburetor on a McCulloch Mac 3200 problems
Great Video! My saw would only run with the choke on, I took it apart and cleaned all of the orffices with carb cleaner,and air now it runs like new! Thank you very much!
Throwing my chip in the best explanation pot. Thanks so much for breaking this down, now I've got to take another look at my chainsaws carburetor and get her fired up again. Take care my friend, see you on the next one
Brilliant video! I'll be sending this around to everyone who has every opened a two stroke!
Serviced a stilh hs45 cutter and primer bulb wasn't ful it was less then half b4 I serviced it now it won't prime at all fuel is coming in from the entry point but going straight into the inlet causes fuel to leak evry were,why won't the bulb prime,I have ordered a new carb as I think rhe little valve on the primer side isn't working any advice would help in future thanks
Well done! I would appreciate a follow up video explaining problems that arise with these carburetors and how what you have describes here is impacted by these problems. Symptom and cause type of thing.
Thanks!
What genius has the patent on this carb design? It solves the problem of having a float to deal with. Especially in something that might be upside down. Like some planes, I saw a video on, in WWII. They stalled because the float bowl was full of fuel and when the plane was inverted, the float "floated", which is what it's supposed to do. The problem was that the float floating in an inverted carb will open the needle valve and flood the motor. On restart, black smoke could be seen in the exhaust. I don't know if that was the advent of these diaphragm carbs, but they certainly solve the problem on both two and four-cycle engines.
Superbly useful explanation, thank you! I had to recently strip and clean the carb on my STIHL strimmer. Your video was a big help.
You earned my subscription. Great job describing all the process on how it works. Keep up with this type of videos
Marvelous video. This is THE video I was looking for to understand how the carburetor of this type works. Thanks a lot.
This is perhaps the single best educational video on UA-cam. Told with skill, terrific videography, and good sense, I would rate this as one of the all time best.
Amazing excellent video thank you very much! you did such a great job and very helpful!
Thank you for taking the time and effort to produce this video. I recently ordered a service kit for my old Stihl chainsaw,and rather than being a little apprehensive towards stripping down the carburetor, instead I was fascinated and confident, it all makes sense now. What a clever design. Thanks again and all the best. Tony
A pleasure to watch, Thank-You for doing this GREAT video
👍 thanks for sharing. Excellent video. Very helpful
You’re grasp of this material is as impressive as your presentation. I am sure you have probably heard it before but if you haven’t, you might consider a quick caveat indicating that the tick-over condition as it relates to a carburetor is understood in other parts of the globe to mean the “idle condition”. Your videos have helped me immeasurably troubleshoot and repair numerous small engines. Please continue to post these as you find new material.
Thank you so much for your nice feedback. It's comments like yours that motivate me to continue making these videos. Craig 😀👍
I'm late to this video, but OUTSTANDING!
UA-camd "how does a diaphragm carburetor work"
Was not disappointed.
thank you very much
i kept this machine for 4 months i just started today
Wonderful! Most instructive and professional video I've ever found on youtube! Excellent camera work, graphics, and narration. I will be looking for more from this gentleman, even on topics I don't need help on!
Wow, thank you! Craig
Fantastic video easy to understand and follow. A lot of two stroke carbs also have a LA or idle screw - does this just act on the throttle stop to open the butterfly slightly to allow the engine to tickover or is it more complicated than that ? Thanks again for a great video
Hi. Thank you for your absolutely wonderful feedback, and yes, generally the idler screw does work in the way you have mentioned. At least in my experience anyway. Thanks again. Craig
@@TheRepairSpecialist Craig you`re a star Thanks for the great videos
Fantastic explanation, clear and precise. This helps me greatly in my first ever service and repair of my equipment. Thanks for producing this video.
+Richard Redcastle
Brilliant, Thank you for letting me know
@@TheRepairSpecialist Hi make a video on how many you turn all 3 runs in L H and T
I have agree with Steven Wayne that is very thorough and is to understand I have to watch it a few times to remember it though
Spectacular. Thank you for this.
Thank you, I was very well informed by your podcast, Excellence in your presentation.
Thank you so much. I really appreciate it. Craig 👍👍👍
Very helpful video, clear and precise. Thanks
Thank you, I appreciate your kind comment.
So very good and CLEAR. You Sir, are a GREAT TEACHER.
Great. Simply great. :)
the id
Tell us about the small hole on the metering diaphragm cover. Some carbs have it
one of the most informative 14minutes and 42 seconds of my life. Just trying to work out now why I seem to get fuel into strimmer engine but not starting despite a spark. Plug coming out quite wet. Have another strimmer which starts and seems to throw out a mist through plug hole. This one doesn't so I assume I may be getting too much fuel in for the spark to cope with. off to watch lean and rich mix vid now. Thank you for your expertise and posting vid
gas
grainger5133 check the spark arrester. If you have a stihl, its very easy to remove,clean, and replace.
The best explanation I found on the entire web :)
Many Thanks !
Excellent explanation. Very professional. Thanks.
That's the best, clearest explanation of how my chainsaw carb works that I have seen. Thank you very much for taking the time. I have learned a lot.
Thank you so much. I really appreciate it. Craig 👍👍👍
Great video…….you really are a specialist when it comes to these little carbs!! Love the explanation drawings. Keep up the amazing work!
Thank you! Will do! 👍👍👍
Very well explained, thank you. Muchas gracias
Thank you for all the awesome details hopefully it fixed my Fs.38 weedwacker!! Thank you again that was awesome video!! Keep the r.p.m. up and the h.p. down!! Thank you!!!
Thanks, you too! I really appreciate it. Craig
you would make a great teacher. explain stuff very well
This was beautifully explained. It was like taking a knowledge journey. Much appreciated sir.
Thank you for sharing your knowledge. Cheers 🇦🇺
Absolutely fantastic explanation of how this carburetor works. Excellent camera work as well.