Lawnmower Coil Pack Sparking System - Induction Coil, Transistor! (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 😊👍

[@SDsailor7]

Do all lawnmowers have that little wire that kills the engine? anyone know? Thank you. Great video!

[@lillianmuffett4077]

Craig - Don herein Canada - Just saw your small engine coil lecture. I know you are probably getting all sorts of praise for your approach to effective instruction. I love how you decided what to include and what not to include in your instruction. I only wish my grandchildren were schooled with this sort of approach to instruction.

[@autocompletellc9906]

Listen, let me explain something to you all. I’ve read literature. Lots and lots of literature. Lots of literature that explains how electricity works, including down to the atomic level. And over time I’ve gained an amateur’s understanding of it. And even then, when don’t work with electricity enough, I have to read that literature again in order to refresh my understanding. However. I have NEVER had electricity explained to me as concisely, intuitively, and detailed as this video does. And I’m going to tell you right now-I don’t think I’ll ever forget it, such that I might have to revisit this video as I have all the literature I’ve read. This explanation sort of drilled the concept in my head. Excellent, excellent work by an excellent teacher. Now if I could grasp how voltage is like pressure/force, and how current is like volume, and how resistance is like a restriction, I’ll be the better for it. Wow. Just wow. What an amazing video. Bravo! Now just freaking imagine, that he taught all of this, in this way, using a coil that’s found in a lawn mower, or chain saw, or pressure washer. Like that’s legitimately wild to think about.

[@TheRepairSpecialist]

Wow. That is probable the best ever feedback have ever had since starting this channel back in 2012. Thank you so much. You have motivated me beyond belief. Thank you so much again. I’m on the case with the things you mentioned that would be beneficial for o make another vid about. Thanks so much. Craig 👍👍👍👍👍👍

[@chrisbutler6673]

55 years ago my physics teacher spent a week trying to explain this to us and we got half an idea but you have, in 16 minutes explained it crystal clear. Fair play to you. I hope physics students today get to know about your videos. Thank you.

[@johnnellis3025]

55 years ago they used points, it should have been easier to understand.

[@jimthomas777]

Coil ? Magneto ? Transformer ? It's a Tesla coil , in reality it simply steps up voltage , a auto has a 12 volt system , the coil steps it up to 35,000 to 80, 000 volts , The coil on a lawnmower engine is the same coil except magnetic fields are traveling through the steel into the primary and secondary copper coils increasing voltage and makes the spark plug zap a spark , you can make a lawnmower coil make a zap with a 12 volt battery , I have many coils in my collection , I can make a 4 inch arc across 2 steel nails , that's a few thousand volts , It's a spark as long as a spark plug

[@shoechew]

@@jimthomas777 You should take that act on the road, man.

[@jimthomas777]

@@shoechew , I would take that act on the but it's Killer , As the volts are so high that it can and will Kill you , instead I burn Wood and do wild things at home in a controlled space and no one can get hurt , Except for the burnt wood , But I wire brush , sand and polyurethane the wood and sell it as Art pieces , It looks like lightning hit

[@shoechew]

@@jimthomas777 625 Death Due to Fractal Wood Burning: An Emerging Public Health Problem

[@dennismurray1952]

I was an electrician for 50 years with a degree in Industrial Electronics and wish my teachers back then were this capable of explaining electron flow. I am now a subscriber, well done.

[@darronsargent3956]

Hands down the most comprehensive and simultaneously easy to understand explanation of ignition coils I ever seen

[@brymw2091]

This is seriously THE best explanation of electromagnets and how they're used in ignition systems. Like most everyone else seems to be saying, you accomplished in 15 minutes what most courses or classes attempt to do in days or weeks. Fantastic job man, thank you.

[@nealvance8701]

I'm a retired electrical engineer and am humbled by your ability to teach these very difficult concepts. Your sense of what to say and show as visual aids is astonishing. This was a lot of hard work and preparation, and your lifetime of learning, perhaps frustrations with lousy explanations of how the world works, came clearly into focus. KZbin, for me, is all about learning from others, and if Google ever had the equivalent of an "Oscar" for best "teacher," you would get my vote!

[@edwardriess]

I've been an EE for more than 50 years, am still working full-time, at 76 years old, on avionics at one of the largest multifaceted companies. I've seen a lot of technical presentations during those years but have rarely seen one that teaches as well as this one. I will seek more of this man's work.

[@kevinjones8069]

Any internship opportunities for Mechis? 😅

[@robinmoncrief2470]

⁠Brilliant explanation.

[@ToddHofer]

I've been an Electronics Engineer for 42 years and this has to be the greatest explanation of Atomic Theory that I have ever seen. My 8 year old grand-daughter is taking a VERY keen interest in Electronics and Robotics. I've been teaching her things for a couple years now. As you can imagine, explaining Atomic Theory to an 8 year old is the one thing I dread doing. I'm going to show her your video because you have done a FAR better job of explaining it than I ever could. Thanks Mate!

[@williambranham6249]

In your world that is the equivalent to the "birds and bees" talk most parents dread.

[@ToddHofer]

@@williambranham6249 I'd rather explain that LOL!

[@williambranham6249]

@@ToddHofer 🤣

[@brettclay2129]

i'm over 65 years old been working on equipment my whole life and learned a bunch in the last 10 or 15 minutes

[@tfatcher]

I wish this video existed when I was in in high school 60 years ago. Bravo! Well done sir!

[@fredgarvin4482]

Yeap. But 60 years ago there were points not transistors to break the primary coil to cause the collapse. The transistors switch off much faster than the points so you get a better spark.

[@ginginthing]

74 year old aircraft mechanic and small engine repair here. I might have been taught this in A&P school for engine magnetos but can't remember doing so. This was a very clearly explained and educational video to me. Thx.

[@stanwooddave9758]

I'm 68 yr's old, and just now learned how that darn coil on my different machine's works. Better now than never. I worked as an autobody (Panel-Beater, for those across the pond ) guy for just over 25 yr's. You are a GREAT TEACHER. Can't recommend this video enough.

[@whgrunow]

85 years old and learning everyday ! An outstanding video and very interesting explanation 👍

[@wellsalan9062]

I've been an electrician for the last 45 years, in all this time your explanation of the principle of electron flow is the best I've ever seen, well done, for making this understandable. If I were still working and teaching Apprentices, I would recommend visiting this clip to them.

[@Rylan3456-z7y]

You took the knowledge of something that is so basic and well taken for granted and made it so clear down to the atom! This right here is the best KZbin teacher ever! Bravo!

[@tompaparounis5731]

This is hands down the absolute best video presentation of how the coil works especially deep diving into the atomic theory/explanation! Thank you so much for taking your time to produce this presentation. It’s excellent!!

[@sidewinder4702]

I never knew you could get so technical while explaining a lawn mower coil but I couldn't stop watching!

[@arcburn3364]

I chuckled when this video was recommended because I thought I knew all this, but I didn't know about the trigger coil and it's circuitry. Maybe this void in my understanding led me to watch this video. Also I am impressed with your presentation. Well done.

[@wgm-en2gx]

Same for me. I thought it was simply that the magnet passed the coil and caused a spark. I never knew there was trigger coil and circuit.

[@gpweaver]

Hell, same.

[@lawrencethompson127]

The older ignition coils do not have the trigger coil. They use points to break the circuit and collapse the magnetic field. The two are generally not interchangable.

[@Mr_Tecumseh]

@@lawrencethompson127 They are interchangeable on all Briggs engines built from 1965 and on. I also watched a video where a fellow got a 1953 to work on the modern coil. So they can be. Certain engines like Tecumseh can't because the old magneto was behind the flywheel the modern one on the outside, however a Nova II can give one of those electronic ignition as well.

[@marteck319]

Briggs Stratton called this pointless system “Magnetron”. I had no idea how the magnetron was triggered until now, thank you.

[@JustinRK81]

I've been a mechanic of electrical engineering and HVAC field for many years now going on almost 24 years to be exact and I have learned so much over the years and I have learned it in so many different ways but I must honestly say from the bottom of my heart I truly mean it when I say this your video and your explanation of how the magneto coil works is by far the best I have ever seen I've never watched anything so clear as this you waste no time in explaining unnecessary details you go right to the point but you pick up the important details that are often left off and you discard details that aren't critical to know so it makes it less confusing and much easier to learn and understand the perfection in your animated video also helps tremendously I just wanted to say that I really enjoyed you sharing this video I learned a lot from it and I will pass it on to others and recommend it for many years to come THANKS again for sharing your video...!! 😉 Yours Truly , Justin the HVAC Tech.

[@TheRepairSpecialist]

Wow. Absolutely wow. I have never had such amazing feedback and from a professional as well. Thank you so much for your detailed response comment. You’ve mad my day. Craig 👍👍👍👍👍👍👍👍👍👍

[@JustinRK81]

@@TheRepairSpecialist gladly

[@skyespye6053]

I repaired and maintained lawnmowers for five decades, and this is the first time I understood the process of the coil! Thank you very very much

[@paulniggel]

at 73 years it proves one can never stop learning I am currently servicing my hayter Harrier had for 20 yrs changing coilpack etc, found this vid, totally inspiring & educational Brilliant thank you

[@TheRepairSpecialist]

Thank you for your awesome comment. I really do appreciate it. Craig 👍

[@peterchambers1868]

This is the best explaintion I have ever seen...best graphics too!

[@azerorezae]

yeah he did it

[@chrisbingham3289]

Your talent at explanation is unsurpassed.

[@burtlade1705]

That was the best explanation of how a pointless system works I have ever seen. Thank you!

[@doninmichigan]

I wish I had this video 50 years ago when I was working on my mini-bike, then some years later when I was starting my career in the electrical trade. Great presentation!

[@Goodellsam]

You are a brilliant teacher. Knowing it and being able to effectively teach it, is a gift.

[@Steelplayer59]

I have 50 years of electronics theory and actual day to day practice. Yet, there were sections in your presentation that brought to life areas that only were vaguely understood by me, specifically the electron flow from the outer valence ring. Excellent voiceover work and graphics. No second thoughts about subscribing to your channel, and I’ll be sharing this with the many folks who come to me with questions. Your explanations far outpace my abilities to do so. Excellent work!

[@DougBittinger]

An excellent and clearly illustrated explanation. If things are mechanical: go up and down, back and forth or round and round, I can look at them, figure out what's not working and fix them. But electric things just sit there and grin at me. This showed me how the electricity moves and what happening in a mechanical sense. Truly enlightening. Thank you.

[@split150]

Wow, I was 100% not prepared for this high of quality. Great information!

[@LeeGretton-xj1jj]

You’re presentation technique is spot on which makes the subject easy to understand, the level of detail you have included here is just right, thank you. EE Eng.

[@JageeAgain]

This is a detailed and accurate description of the process. Your graphics are spot on and easy to follow.

[@amandayensu7835]

I teach Motor Mechanics to 16-19 year olds and use video and animation to help explain processes such as these. We are currently on ignition systems. I must say your video is absolutely superb ! I especially loved the electron movement part which was so well explained, anyone who watches this video will easily understand exactly how electric current is made, you know, the outer electrons flying about.

[@nickgeorge2176]

This is the best and clearest explanation I have ever seen, thank you.

[@turbo50hh]

Dude, i am a car guy. My existance has evolved around the automotive industry since i was born. The ignition of an unternal combustion engine has been that element of magic that occurs that has always been just beyond my understanding until now. The simple and direct explanation you just provided has given me the knowlodge of how the discharge across the air gap works. I have always knowledge the whinding and magnets that mive the toroidial field expands and contracts by proximity but now i see how the electrons are shoved forward for the eventual jump and discharge of compressed explosive gas. This is a game changer for me. And you gave a stranger a clear image of fast as light movement of electrons. Thank you very much!

[@LyleHenderson-vm3rx]

Outstanding! Clearly explained many of the "WHY" questions that others have never been able to explain in enough detail for it to make sense.

[@ThunderDog]

The time spent to illustrate this and maintaining a logical progression was fantastic. Thank you.

[@Petermomo5050]

Great explanation of the system thank you for sharing!!! Somehow, I heard anti-gravity in your explanation somewhere. 🛸🛸

[@TheRepairSpecialist]

Thank you so much. 👍👍👍

[@karrZ-mi5km]

If only this man was my personal teacher... Wonderful explanation as always

[@rickzelaya1960]

This is the best explanation I have come across. Most people call the ground negative and the wiring positive, when in fact is the other way around. This explanation makes perfect sense.

[@My6stringer]

The best explanation on this subject so far, 99.9% of all mankind doesn't know this, including most mechanics !!! Thanks !!!

[@donfitger9567]

6:12 A fantastic explanation, I am an electrician who has had a very detailed and exhaustive week of my instructor trying to put that in my head, it didn't stick. Now however I have a true understanding! Thank you, it's nice that you've made my life make sense!

[@TheRepairSpecialist]

Excellent. Thank you. You are very welcome. Craig 👍

[@markparee99]

Came for the lawnmower lesson, stayed for the physics lecture. Nice job, Craig!

[@usmcmario5032]

I have never heard the process explained better .

[@jacobreinen5392]

In my 48 years of life and search for knowledge I do not believe I have EVER heard/watched any instruction of complex technical material so beautifully articulated in such a clear, concise, succinct, and relevant manner! Thank you! I am excited to view more of your content! Please keep ‘em coming!!

[@TheRepairSpecialist]

Wow, thank you! I really appreciate it. Craig 👍👍👍

[@Waldvogel45]

From Iron to Ions, brilliantly linking physics and mechanics. Great clarity and graphics. At last we can see the invisible world energising the visible world .My friend ( Phd, on Ions) gets nowhere near this , after 40 yrs of chat.I saw through a glass darkly, but now .......I see the light

[@joelinpa185]

For years I wondered what changed in small engines that the points and condenser are no longer needed. Now I know it's the trigger coil and its associated components. Thanks!

[@davidmg1925]

me too!!

[@nickybritain4900]

And I thought it was all done by magic!👍😂

[@brennandc]

Yes...my gosh, I was to the point of tears trying to understand that, now I get it!

[@teksight9714]

Thank you for confirming exactly what I was thinking. It was a mystery to me until this video. And the guy at the farm supply I go to had it all wrong. He was trying to sell me a replacement coil that only worked with points and condenser that had been on his shelf for years in a crumpled box and was telling me that was the upgraded coil when I asked why they looked different. LOL.

[@nickybritain4900]

Don't be fooloed by scams.

[@bicyclerepairman-rd400]

Thank you for this clear and concise presentation. I now feel enlightened and much less mystified about electromagnetism. A life changing gift.

[@johnwade5747]

I've tried over and over to get guys to realize that its the OPENING of the points that times the spark and I always get an argument. Set points wider to advance,Across the board. Good video,for sure!

[@sibalogh]

Then least you always had the points to OPEN discussions on the topic, eh? 😁😉

[@GoingtoHecq]

So the opening of the points times the collapse of the magnetic field in the primary coil by disrupting the current! Unintuitive but it makes sense given the electrical theory behind it. I didn't get points ignition at all. Great comment!

[@vasilispapadellis8022]

EXCELENT....PERFECT...never seen such simple and detailed at the same time explanation of spark creation before in my entire career. Well done.

[@ianwood7241]

Thank you very much for your video. Perfectly done .you make understanding the subject easy

[@petemoss9831]

Something that had intrigued me for yonks was how contactor-less ignitions worked, but all clicked into place after watching the vid. Love this style of teaching/learning i.e., why and how. For my practical’s classes, I attend a Canadian guy who likes a beer, also, a couple of others others too. Great work by all, many thanks.

[@the1spyderryder]

As an electrical engineer that loves electronics your explanation is spot on. I have never heard the process explained better .

[@williamhowells1615]

Great explanation. Your step by step approach leaves nothing out and is presented in a logical way that makes so much sense. You make no assumptions of your audience's knowledge which is helpful for novice or expert alike. I am keen to watch more of your videos.

[@TheRepairSpecialist]

Wow. Thank you. I really appreciate it. Craig

[@stuart1030]

This whole series of videos are not basic. They are, bar none: the most educational and well produced tutorials on KZbin. Thank you thank you for all the time and effort you have given freely to us. *************

[@ronparker6489]

Awesme video guy. I'm an old retired E.E. who works on small engines and needed a refresher course. Thanks so much. It's the best technical video I've ever seen, and I've seen a bunch. Congratulations.

[@TheRepairSpecialist]

I really appreciate your feedback. Thank you. Craig 👍👍👍

[@terencemeehan8237]

That was fantastic! Always knew how coils and magnetos worked,but never at a molecular level, I enjoyed that immensely and it just goes to show your never too old to learn something fascinating. Thank you for your time.

[@yothu2431]

Amazing, the ability to explain an extremely complex process in terms that can be processed and understood by I would think most people. At school so many interesting things were taught, but the disconnect was the ability to provided context and real world applications of where and why it can be used. Well done Craig, you are a very talented person.

[@EzRay11]

You Sir are a genius! I thought I understood the basics of a magneto. It seems I didn’t know nearly enough. KZbin should give you a raise. Cheers Craig

[@kevinmurphy8450]

Great video and great explanation of how the coil works. Straight to the point, no lengthy introduction talking about the cat, dog, length of the grass or some other unrelated stuff. Thanks

[@MagmaSloth64]

my goodness this is the BEST VIDEO EVER I've been pouring through resources to repair my mower, and suprisingly in this video learned more about electrical engineering and atomic physics then I ever would've expected! You clearly have such a clear understanding of these concepts. "If you can't explain it to a six year old, you don't understand it yourself" Einstein said, well thankfully you've grasped these concepts and articulated them in a way that you make the complicated seem exceedingly simple. You've gone above and beyond, thank you!

[@MrBillmechanic]

ABSOLUTELY BRILLIANT. I AM AN ELECTRICAL ENGINEER. THISIS THE BEST EXPLANATION I HAVE EVER HEARD. YOU ARE AMAZING!! KEEP UP YOUR AMAZING WORK!!!

[@jimmybryan6760]

Great explanation! All I knew before was it was a magnet moving past a coil, and that ignition occurs as the field collapses. The rest was a revelation, Thanks!

[@davidjones8942]

Which leads me to the obvious question, why add the schmitt trigger and second and third coils (trigger and primary coils) when you could generate a spark from the magnet passing a large secondary coil (which then would just be called the coil) and the result would be more reliable due to having less parts to go bad? Is it worth a more finely tuned spark to reduce overall reliability? (Assuming the answer to the first question)

[@davidjones8942]

@@jonka1 ok, thx!!!

[@clearprop]

Just awesome. Educational videos as clear as this are incredibly rare. Thank you! 👍

[@TheRepairSpecialist]

Thank so much. I really appreciate it. Craig 👍

[@rudyv5325]

What was of interest to me in this very comprehensive explanation was the use of the transistors . I recall many decades ago small engines had a set of " points" similar to (much) older car ignition systems. All that mechanical switching changed in the early 1970s with the introduction of solid state electronics, AKA transistors. The circuit diagram drawn in the video is a clear explanation of just that transistorized switching circuit... where the " points" used to function Great lesson

[@mrcryptozoic817]

So that's why we don't see points anymore! The function is necessary, the device isn't.

[@danp3796]

You Sir are about the BEST teacher I have ever seen . I have been an automotive technician for over 40 years and this is the best explanation of how a coil works right down to the atom! I also wish my teachers had your ability to explain electron flow back when I was apprentice. Thank you!!!

[@TheRepairSpecialist]

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

[@edwardjardines9623]

Hi. This is probably the best electronic video I’ve ever seen. I came here because the igniter on my gas engine weed whacker stopped producing spark. With the help of other videos I correctly came to the conclusion that the igniter had failed. Still under guarantee I wrote to the seller explaining the problem. They wanted me to return the entire tool’ but I explained I could send them the igniter but their next email stated that they could only give me a refund because the tool is out of stock. In the meantime I purchased another igniter from china, installed it and it creates spark. But trying to start it the engine bucked a little so I decided to check the installation AND THAT’S WHEN I SAW THAT THE POSITION OF THE MINI COIL IS ABOUT A CENTIMETER EARLY. Which to me means that the timing is off. But I wasn’t sure until I watched your video. It’s truly a work of art! Thanx so much for creating it.

[@vne200]

A heartfelt 'thank you' for such a crystal-clear explanation. You are an exceptional teacher and your illustrations in this video helped me to understand old concepts in a completely new way. Well-done, sir, and once again 'thank you' for the role you are playing to educate those with a thirst for knowledge!

[@timmer9lives]

Ditto T C… The absolute clearest explanation I’ve ever seen. Well done sir !!

[@arthouston7361]

I think you could add two things: 1) the opposite end of the secondary coil being tied to the the frame of the laminated fixture to complete the HT circuit, and 2) an explanation of the previous version of this magneto ignition, which used a set of breaker contacts driven off the camshaft or an eccentric on the crank. Unlike the Kettering auto ignition, which collapses the Primary field when the contacts open, the magneto version initiates the spark when the contacts close. All in all, a good video!

[@davismize]

Spectacular!

[@chrisstreet7384]

That's why he said "basic explanation" pay attention.😉

[@arthouston7361]

@@chrisstreet7384 Attention is why he got those recommendations. There is a big difference between "basic" and "incomplete." 😇

[@chrisstreet7384]

@@arthouston7361 most of the people that he is aiming this towards don't have any idea that it's incomplete. I'm assuming he said basic he had a time frame for this video. The fact that it's incomplete is beside the point. I am assuming that he said basic just to get people to watch and learn and get interested.All same time making a 15-minute video as opposed to a 30 or 45 minute video where people could lose interest.

[@arthouston7361]

@@chrisstreet7384 Interesting. I have to guess that you had nothing better to do today than to make a critique about expanding the knowledge of people who watched the video, assuming both the target audience and the intent of the content creator. A fascinating study on human motivations.

[@martinlintzgy1361]

I came here because I always wondered how one of these mag coils worked without a contact breaker. What a superb explanation from a repair man!

[@gunner49er]

You’ve given the best explanation of how a magneto works that I have ever seen explain in 60 years

[@manongjuan6657]

Being an electrical technician myself this is very informative. It refreshes us. Tnx keep it up

[@dlake8198]

Craig, That was the clear, logical, step-by-step explanation I have always wanted to see. Bravo! The animations and actual cut-in-half transformer coil, showing the real life locations (initiator, primary, secondary coils) brought these electronics and physics concepts into full sunlight. Thank you.

[@TheDe1deonly]

Great job! I've known most all of this, separately, for years; but you put it all together clearly and concisely...

[@bobdrake7118]

Best explanation of generating a spark in an internal engine. I never understood all the physics that was happening until now and I am 73 years old and worked on a great many motors. Thank You.

[@glennnypiuk4156]

As an Electro-Mechanical Engineer teachers in schools should use the explanation video to there first year students in basic electrical understanding ,it's the most simplistic explanation and so informative of how spark is explained with the video seeing is believing....Great Job keep them coming.....and thanks Glenn

[@TheRepairSpecialist]

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

[@paulworkman5755]

Speaking as a technical writer myself, this "lesson" was (IMO) very well done!

[@ronniesciortino7587]

Wow, simple, straight forward and so easy to understand. What a really great video Craig! I'm 69 years old and thoroughly enjoyed watching and learning from your video. One doesn't need to have a PHD in common sense to understand this. Great!!!

[@Syncop8rNZ]

You tricked me into an electromagnetism lesson! Good job, I enjoyed your explanation.

[@bradw3036]

The best example of how this electrical system works. Where were you 30 years ago when the atom's in my brain were splitting trying to figure this out. Bravo!

[@benkanobe7500]

Fantastic! If only my science teachers were as good at explaining things as you are.... Thank you!

[@Boscovius]

Well done Sir! You have taken my understanding of basic electrical theory to the next level.

[@letrainavapeur]

I have fitted these coils to older B&S and although I knew the basic idea it was great to have an in depth explanation rather than having the meaty bits glossed over, well done.

[@track1219]

Does this type of coil work in an older B&S that originally had points? Using the original flywheel?

[@stacylangford8015]

Never studied this before. Replaced some coils, but I didn't know about the trigger coil. Very good, technical explanation. Thank you!

[@randys9711]

I understand electronics. I can attest to the fact that your presentation, was accurate, complete, and beautifully done. You did a superb job. I've never seen better. RS

[@TheRepairSpecialist]

Thank you so much for taking the time to write your kind comment. Craig 👍👍👍

[@johnfarrell3171]

Greetings Craig with a thousand thank you's! Just working on a lawn tractor and was asked by one of the "youngbloods" to explain how I knew what the problem was and how the system works . . . EXACTLY . . . where do I start LOL!. Poked around for a visual assist and found you here. Twenty minutes of "solid gold" intel! Of course, I had to pause you a few times to interject something that sounded impressive to them like I knew this all along 😄😄😁😁😀😀

[@TheRepairSpecialist]

Awesome. You have some teaching to do now 😂. Thank you for your kind feedback. Craig 👍👍👍

[@arthurfricchione8119]

Craig this was definitely a very educational video. Thank you for putting it together and sharing it with us. I’ve looked at magnetos and flywheels my whole life and I’ve never seen it so well explained. In fact I have one in my shop right now and I’m going to compare it to your video. All of your videos that I have watched and I think I’ve watched just about everyone of them have taught me something. You know what components do but I myself like to know how they perform. Thank you Craig 👍😊

[@QuaabQueb]

WOW! Now that is an explanation beyond 'Fascinating'. I can't wait for the video that shows how the system of points and condenser works. It's something I never understood.

[@edwardbredfield1680]

EXCELLENT description of the process...well done.

[@nickush7512]

Mate, if they taught chemistry and physics in schools like you have done within the first 8 minutes, we would have a nation of geniouses. Fantastic presentation. Good on you. Thanks.

[@TheRepairSpecialist]

Wow, thanks. I really appreciate it. Craig 👍

[@nickush7512]

@@TheRepairSpecialist Hey Craig, you are most welcome... well deserved mate :)

[@samsonimport]

Your way of teaching very good. Pics help to understand clear than theory. Voice , animation , silent background . No music . All good. ✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️✌️

[@matterantimatter1]

if there were teachers that could explain principals of science in this manner there would be a lot more smarter people, to run this planet and beyond

[@daos3300]

there are, and they do. and so, there are.

[@vinopan5374]

Absolutely excellent explanation of ignition module workings! I thought I understood until you clearly explained it! Thank you so much. Keep these kinds of educational videos coming!

[@davidm.4670]

@@davidwillard7334 Dave - instead of the repetitious comment w/o info how about a link to your B&S manual of the 80s ? = more helpful ...

[@greghaub1571]

As a graduate engineer I find this discription excelent. I am trouble shooting a faulty small engine, no spark. I realize the coil is bad but have never looked at the design of a small engine ingnition system. Your description was GREAT. I understood the basics but was not sure of the final engineering involved and you cleared it up perfectly.

[@Africa1000]

Singularly the most clearly explained tutorial on how a coil works. You sir, have no idea how valuable your work is.

[@TheRepairSpecialist]

Wow, thanks. That is one of the best comments I've ever received and I'm truly grateful to you. Craig

[@concinnity9676]

Good job. I also did not know about trigger coil and Darlington pair. As an EE, I suspected that the current induced in the primary would be alternating. I think I now see that the transistors impede the reverse flow. That requires a high reverse breakdown voltage spec on the Darlington, but really shortens the mag. field collapse. As we know, E = -L (dI/dt), so that short dt gives the high V.

[@stevenolsen6360]

just one small thing, the RETURN PATH, to the secondary coil, Is the secondary earthed to the iron core, or a screw to the body of the motor, or at the mounting bolt

[@Hopeless_and_Forlorn]

Not to the core, but definitely to the engine, or at least to the cylinder. Usually the engine is electrically bonded to the frame of the mower, but that is not necessary. Spark current flows in a complete circuit, so any starting point is arbitrary. You could say, though, that the starting point is the engine where one end of the secondary coil is connected, through the coil and plug lead, through the plug center conductor to the tip of the plug, through the air gap which is ionized by the high voltage from the coil, through the body and threads of the spark plug and back to the engine and its connection to the "starting" point.

[@richardgalli7262]

I did not know about the smaller pickup coil. From this it is important the orientation of the smaller pickup coil to the rotation of the magnet.

[@robertheinkel6225]

I watched a Mustie1 video, where the engine would rip the rope out of your hand while starting. The owner had replaced the coil, but installed it backwards. The timing was now off, firing the plug at the wrong time, causing the engine to turn backward. Now I understand what was actually happening.

[@111000100101001]

Yes and the spark will be much weaker since the order at which the flywheel magnet energizes the coil and the trigger.

[@lisagreen3872]

Wish I had ,had you as a teacher,40 years ago.. Now we know The teachers Need to apply this explanation of ions and electric current to a lawnmower to make sense ! This guy's a genius ! Thank you! I Have ADHD and have tried to read books and learn this but only had to back up a couple of places and Actually got it ! Thank you for your wisdom ! I have rotors and pieces of motors to try to learn how it works putting together but you did it in a snap!

[@TheRepairSpecialist]

Well. This feedback if is one my favourites ever. Thank you for taking the time to let me know all of this. I really appreciate people like you seeing my videos. Thank again. Craig 👍👍👍

[@framcisboudreaux537]

Sweet! Very well spoken. Kinda hypnotic and confident while taking. Hit on all the right words and none of the wrong ones. Moved through the lesson with a purpose. I feel like learning some more. Thanks again. Paul