A Unique way Showing How a 2-Stroke Chainsaw Engine Works (Cutaway Chainsaw)
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- เผยแพร่เมื่อ 27 พ.ย. 2023
- Using this Unique Cutaway (Cut in half) Chainsaw, I Explain how A 2-stroke chainsaw engine is an amazing combination of power and simplicity that is ideal for heavy-duty cutting jobs and tree felling. 2-stroke engines are small and light, completing a power cycle in just two piston strokes, in contrast to their 4-stroke counterparts. Once you blend fuel and oil in a precise ratio-usually 50:1-and pour it into the fuel tank, the magic begins. The engine roars to life the moment you pull the starter cord.
The compression and ignition strokes start the process inside the engine. The fuel-air mixture in the cylinder is compressed as the piston rises. This mixture is subsequently ignited by a spark plug, producing a flaming explosion that exerts tremendous force on the piston. The chainsaw gets its power from this downward action. Precision cutting of wood is made possible by the crankshaft being turned by the piston's descent.
The 2-stroke engine doesn't spend a stroke on venting burnt gases, though, which is the twist. Rather, the exhaust stroke is the upward motion of the piston, which forces the exhausted gases out of the cylinder through ports near the top. The entering fuel-air mixture is drawn into the crankcase concurrently. The cycle is repeated when the piston rises again and compresses this new mixture. Chainsaws are an essential tool for both outdoor lovers and lumberjacks because of their clever design, which produces raw power despite being less fuel-efficient and more polluting than 4-stroke engines.
Great way to explain the 2 stroke cycle. I totally understand it now.
Only took 68 years for the right person to teach me. Lol
Thank you so much for your kind feedback. Craig
Craig, this short video is totally on point. You have a unique gift of explaining the extremely complicated topic of compression/fuel/spark/combustion in its timing and function while making it understandable for lesser knowledgeable men like myself. You are giving us incredible content. Thank you for your gift of teaching.
Wow, thank you so much. I really appreciate it. Craig
Brilliant. Thank you so much for the clear and concise explanation. You're an excellent educator!
Thanks lots for clear explanation! I was taught this aged 11 by our science-master. You brought it all back.🙂
Best mechanical videos, hands down 🏆
Wow, thank you. I really appreciate it. Craig
I am so happy I found this channel. This is incredible as a showcase and explanation
This is the best explanation of a 2 stroke I have seen. Watching was a good use of my time.
Thank you so much. I really appreciate it 👍👍👍
Thank you,I have used 2 strokes all my life (70'splus) always wondered how they worked.Brilliant explanation 🤔.
Thank you so much. Craig
An excellent demonstration and explanation !
Outstanding example. Thanks!
Thank you so much 👍👍
Another great learning session!
Clearest explaination I've seen. Excellent video. Thank you.
Another great one,Mr. Craig. Your animated drawings along with dialog makes visual understanding easy. Thanks
Thank you so much. I always your feedback. Craig
Hello Craig, thanks for this excellent video, it must have taken some effort to make it and I only wish I had had this video to show to the Grandchildren
some years ago whilst trying to explain how two strokes work (and upside down too 😊 , diaphragm carburetter) as they always showed great interest in our garden tools. I'll pass on the link , if you don't mind, and they can show their children when the time comes 😊.
One wish would be to have all these videos shown in technical classes in all schools because Boys especially are fascinated by this type of mind broadening knowledge 🤔 Best Regards, Ian 👏👏👏 😊
Wow that’s some of the most fantastic feedback I’ve ever had on my channel. Thank you so much Ian. I really appreciate it. Craig
Absolutely amazing, thank you !!!
You're very welcome!
Your videos are amazing I can follow your explanations easily
Good one!
Thank you! Cheers!
Magnificent explanation!!!
Helping to make this topic understandable for all. Another great job.
Looks like I am not alone 👍# 481
Stay well, Joe Z
Excellent video.
Thank you very much!
Very good advice again ..
Thanks Craig
Thank you so much. I really appreciate it. Craig
Amazing.
I'm 64 years old and never understood how the process worked, now I do. Thanks for this and your simple explanations. Your ignition coil video got me to thinking and sure enough, the coils on my 15 year old field and brush mower were old not producing as strong as a spark as should be. The 15HP v-twin Kawasaki runs and idols like new again. Last winter the snowblower attachment wasn't moving snow like it used to, I'm guessing peak HP dropped 4 to 5 HP. Its a walk behind machine with a brush mower attachment as well. It has a 26" blade that cuts just about anything using 10HP or less so I didn't notice the power dropping off. I was trying to smooth out the idol with carb cleaner the entire summer before winter, " I don't run it much " I have riding lawn mowers. Anyway, thanks again.
Hello there!
I'm thrilled to hear that the information was helpful for you, and it's fantastic that you were able to diagnose and fix the issue with your field and brush mower. It's always rewarding when a bit of knowledge can make a difference in the performance of your equipment.
So,congratulations! Your 15 HP v-twin Kawasaki is now running and idling like new after you found and fixed the ignition coil issue. You appear to know a lot about your equipment, and your proactive attitude is admirable.
It's amazing how much of an effect these minor changes may have on your machines' overall performance. Your encounter with the snowblower attachment highlights the significance of routine maintenance and keeping an eye out for performance variations.
Thanks again
Craig
I always wondered how chainsaw engine works.
An excellent illustration.....
Thank you so much 👍
Excellent, subscribed.
Amazing animation and well explained!
Wow, thank you so much. I really appreciate it. Craig
Great explanation thank you so much
You are welcome. Thank you very much. Craig
Thank you very much for this short video, if we divide 12000 by 60 it means that a two-stroke engine will burn 200 times per second actually this type of engines is Sooo fast
Excellent!!! Thank you!!!
You are welcome! Thank you so much. Craig
Very nice! Show'ing video. One of my engine Style Basic of them Name: Kolben - Schlitz system.
Another great video Sir!
Thank you. I really appreciate it. Craig
Great explanation. Can you explain the centrifugal clutch as well? I already know how it works but i want to hear your explanation
Noted, and thank you for your kind feedback
Good🎉 pls make 4stroke brush cutter video this like..
Thank you, and yes, i will look into that. Craig
Magic presentation. Regards
Thank you so much. I really appreciate it. Craig
This video should be shown in school. Any school.
Thank you 👍👍👍
Awesome video!!!! 🇺🇸🪓🪵🌲🪵🪓
Thank you so much. I really appreciate it. Craig
Excellent!
I really appreciate your feedback. Craig
This was neat to see.
My 1980 Homelite 150A that I restored and put a bigger bar on (came with a 16" and I put an 18" on it) runs better and more reliably than ANY post-1990 2stroke yard equipment I've ever used, which is pretty funny considering I use the same fuel mix in all of them (80:1 ethanol free 91 octane pump gas with AMSOIL Saber oil) and the newer stuff is supposed to use a higher mix ratio versus the Homelite wanting 16:1. Granted I know 2stroke oil back in the day was nowhere near the quality of current high end stuff, but it's nice feeling how much power my old saw has compared to my more modern equipment. Build quality and quality control I'm sure have a significant effect on that as well.
I'd pit it against any modern factory stock 18" saw out there any day!
Vintage saws are REAL saws!!
Really Cool video 😎
Glad you enjoyed it 👍👍
Amazing video! My only question is this: When the piston is at BDC and the fuel/air mix that it compressed has flowed through the side ports and up into the chamber above the piston, doesn’t some of the good un-burnt fuel/air mix escape through the open exhaust port along with the burnt exhaust? If so, that seems like a waste of good fuel over time.
Thank you for your kind feedback, I really appreciate it. And yes, some of the fuel/air mixture does escape through the exhaust port and out before it have chance to be used for combustion. This is why we can often small fuel when the engine runs. It’s not the most efficient way of running an engine but some of the more modern advanced engines have systems in place to avoid most of this waste.
Good
Thanks
I want some dots ice cream after cutting a load of wood after this video.
Ok
@@TheRepairSpecialist Those blue and red dots look just like it.
Hi, Why can you use a 2 stoke carb like a walbro or var jet type WXY? on a 4 stroke with the pump diaphragm installed BUT no impulse input?? It WORKS of course but seems both engines produce suction through their fuel/air ports BUT the 2 stroke wont work if you blank off the pulse port. I can only guess that the 4 stoke produces strong input suction? and this draws up on the main jet producing a vac inside the carb and the little pump valves then draw fuel through? So whats special about inlet valve suction on a 4 stoke compared to the 2 stroke suction? why doesant that do same effect or is it timing or volume and thus needs a extra pulse port? I only seen this on a Var jet so will it only work with this type as it has a long plastic tube and cut to let the fuel out and this provides a strong suction down into the carb but needs the impulse port hole built in for 2 strokes? The Var jet that came with the 4 stoke does NOT have a port hole and of course neither does the inlet port for the 4 stroke inlet either. For a test, I also grabbed another Var jet 2 stroke with a carb pulse hole and put it on the 4 stroke manifold which blanks off that pulse hole and it still worked! so that 4 stroke inlet suction is diff from 2 stroke inlet suction somehow?
Hello sir please how caurborter loda settings
This video should be required for elementary kids. Simple, detailed and an effective learning tool. Might spark an interest in something besides the non productive garbage being taught now.
Thank you so much for your kind and encouraging comment. I really do appreciate it. Craig 👍👍
Husqvarna X torque has a unique half stroke air induction and side piston port design to push fresh air into the exhaust and divert the transfer gas away from the exhaust port and allow for better performance in igniting more pure air fuel mixture on the compression stroke. A more sophisticated system.
So they're technically 3 strokes not 2 strokes.
4 strokes dont need mix because you put it in a seperate chamber and it mixes automatically