Lawnmower Coil Pack Sparking System - Induction Coil, Transistor, Electrical System Works!

Craig Kirkman Visually Explains how the Ignition Coil Works on a Lawnmower Engine. Also, introducing his new channel that explains about physics, maths and general science / @kirkmansacademy
In this video I explain the very Basic Principles of how this type of Briggs and Stratton Ignition Coil Pack Works. It explains how electricity is generated from the Coil's Induction Coil, through the Darlington Transistor, and electrical resistor system, to the Spark plug. So next time you are changing spark plugs, you will know much more about this Electrical System than most others. This electrification from machine to electric power to create a Spark Plug Spark (or Coil Plug as some call it), is an incredibly interesting topic to learn. It's far from UPS Power or Edison Electric either, but it is fascinating.
Remember, this is the very basics ignition automation of the Gasoline Internal Combustion Engine, as the Diesel Engine does not use this system. There is far more to this complicated system than what I have been able to show here in this video, but I have covered enough to get a grasp of the very basics.
So, whether you are using a Riding lawn mower, Push mower, Petrol lawnmower or even an electric lawn mower, this principle is valid. Also true whether your mower has either a 4 Stroke Engine or a 2 Stroke Engine. The Robot Lawn mower doesn't escape this principle either!
If you are having problems starting your lawnmower then please do take look at my other video, where I help you get back you and running again if your Lawn mower Won't Start: • Lawn Mower Will Not St...
All images in this video are Copyrighted to Craig Kirkman of The Repair Specialist.
I love the way this guy ‪@TheRustyRooster‬explains about engines and related subjects in a down-to-earth fashion. Take a look for yourself: / @therustyrooster
Please take a look at some of my other 'How It Works' Videos (Explanations not seen anywhere else):
FOLLOW-ON VIDEO: How the Ignition Coils can fail
• Lawn mower Ignition Co...
* The Ultrasonic Cleaner - How it Works (Explained Like Never Before. Will Leave you Fascinated) - • Ultrasonic Cleaner - H...
* How a 2-Stroke Carburetor Works (Unique Animation and Explanation) - • HOW CHAINSAW CARBURETO...
* How a Two Stroke Engine and Carbureotor work together (Uniquely Explained) • Two-Stroke | How Engin...
* From Fuel Tank to Exhaust - Travel as a molecule of fuel from Fuel Tank, through the carburetor and Engine then out through the exhaust of the Two Stroke engine system.
(Explained Like Never Before. Very Unique and Fascinating View) • 2 Stroke Engine & Carb...
From magnetic fields to copper atoms to electric flow, here I clearly explain to you how a Lawn mower Sparking system Magneto Coil Pack Works (Briggs and Stratton Magnetron) This uniquely Explained video will fascinate you.
Here I want to acknowledge several sources of information that I used to put together this video:
* Transistor: whatis.techtar...
* Magnetron Ignition System: www.wisc-onlin...
* How Spark Plugs Work: auto.howstuffw...
* What happens to the charge when a spark jumpe between two wires?: scienceline.ucs....
#lawnmower​ #gardening​ #repairing​ #savingmoney​ #lawnmowerrepair #smallenginemachines #DIY
This video may apply to the following Lawn mowers and Engines
Lawnmower# Example
Mountfield GGP ITALY etc
'Model' Numbers: 24-3781-00
'Type' Numbers: ES 464
Product Type: MPR 10118
Engine#
Briggs and Stratton Classic, Sprint, Quattro, Series 400, Series 450 and Series 500 - and 10A900
For Possible 'Model' Numbers:
9D902, Q35, Q45, 283707, 098902, 098982, 09C902, 10A902, 10A982, 10D902, 495770, 795083, 95900, 96900, 98900, 9C900
Possible 'Type' Numbers: 2006 E1 and 2033 B1 - 0148 01- 0352 B1
Possible 'Code' Numbers: 00112955 - 05021552 - 9I1014II - 03031255 - 13101956
Carburetors# fitted
Briggs & Stratton Part Numbers: 795083 495770 272372 281028
Many thanks indeed
Craig Kirkman (Owner and creator of The Repair Specialist Channel)
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....
Images within this uniquely explained video are Copyright protected to Craig Kirkman of The Repair Specialist (TRS) Channel. No reproduction of this content is granted.

[@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

[@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!

[@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.

[@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.

[@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 🤣

[@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.

[@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.

[@usmcmario5032]

I have never heard the process explained better .

[@thatonelonelyeagle5398]

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!!

[@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.

[@darronsargent3956]

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

[@thats_my_comment]

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 👍👍👍👍👍👍👍👍👍👍

[@thats_my_comment]

@@TheRepairSpecialist gladly

[@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.

[@peterchambers1868]

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

[@azerorezae]

yeah he did it

[@whgrunow]

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

[@stevenmiller7731]

You have explain this very clearly and thoroughly. I will now troubleshoot my gas powered craftsman 120 V/240 V generator 26 to fix the engine to get spark so that it will fire. I am well-informed and confident now that I can get this thing running!

[@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.

[@ThunderDog]

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

[@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!

[@whgrunow]

Thanks, Fixed my no starting problem on my John Deere garden tractor. Inside the rubber boot that slides over the spark plug the metal plug wire right angle connector had broken. Only thru the Grace of God did I discover the problem. The spark plug wire pulled free from the boot.

[@JageeAgain]

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

[@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.

[@nickgeorge2176]

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

[@heyderaliyev8976]

Narrator is top 1 explainer I have ever seen / especially using the techniques of the language

[@karrZ-mi5km]

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

[@chrisbingham3289]

Your talent at explanation is unsurpassed.

[@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.

[@vileCR999]

I just used your video to settle a debate. This was a beautifully illustrated and explained video. Thumbs up!

[@TheRepairSpecialist]

Wow thank you i really appreciate it. Craig 👍

[@AlPeters-nk3uh]

GREAT explanation. I have spent a career working with induction heating equipment from 1kw to 1.5mw, capsealing to foundry melting system, servicing, training, and engineering and did not come up with a satisfying explanation for the "technical" layman, the people using that equipment. Retired now and wish I had seen this 50 years ago.

[@TheRepairSpecialist]

Thank you for letting know and for your kind words. Craig 👍

[@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!

[@birdpow4706]

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

[@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.

[@mfsperring]

I can't speak for anyone else but this filled in a number of gaps for me. Excellent job. Thanks.

[@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 👍👍👍

[@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.

[@TheDe1deonly]

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

[@Goodellsam]

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

[@dianataulbut2299]

One of the best explanatory videos I have ever seen on KZbin! Brilliant!! You should be teaching physic in schools...

[@TheRepairSpecialist]

Wow. That’s some of the best feedback I’ve had. Thank you. Craig 👍

[@Brad-lt6mr]

One of the best explanations I've ever witnessed.

[@split150]

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

[@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 👍

[@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.

[@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. *************

[@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 👍

[@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

[@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!

[@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.

[@stephenvarney3183]

Best explanation I have ever seen, so much better than all electial books that talk down instead of to you. Keep up the excellent work.

[@Moiz321]

I am an Aircraft Maintenance Engineer Canada or A&P in the US, I learned this theory in school ,any years ago but not like this. I also NEVER EVER Comment on anything and I thought this video is well worth the comment. So, I thought I'd show my appreciation and liked the video, commented, and now subscribed. Well done!

[@timmer9lives]

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

[@burtlade1705]

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

[@MakeSomething]

Holy cow, that was an amazing explanation! Thank you!

[@harchan448]

AMEN

[@vasilispapadellis8022]

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

[@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.

[@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.

[@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.

[@clearprop]

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

[@TheRepairSpecialist]

Thank so much. I really appreciate it. Craig 👍

[@MrBillmechanic]

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

[@xvillin]

Lawn mower coil pack tangent-tangent tangent-tangent tangent-tangent spark. I watched this last year and my other lawn mower is broken so I have to watch it again. Still an awesome description.

[@monarichardson1556]

Thank you so much for this easy to understand explanation of a complicated subject.

[@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!!!

[@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.

[@edwardbredfield1680]

EXCELLENT description of the process...well done.

[@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.

[@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.

[@the1spyderryder]

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

[@paulworkman5755]

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

[@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 👍😊

[@mikechiodetti4482]

I've never had this explained to the point that I understood it. One reason is you explained along the way from the flywheel magnet to the grounding of the cylinder head what takes place or "How It Works." Most teaching is a hodge podge of electrons and magnetism. Yours truely explains that relationship. Thankyou.

[@TheRepairSpecialist]

Thank you. I really appreciate your great feedback. It's comments like yours that motivate me to keep making vids. 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

[@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.

[@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.

[@manongjuan6657]

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

[@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 👍👍👍

[@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

[@stacylangford8015]

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

[@Syncop8rNZ]

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

[@Boscovius]

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

[@allencorey8714]

Phenomenal video, this just makes sense. This is better than any college lecture I've made it through and it takes much less time.

[@freddesjardins7399]

Best explanation of electron flow I have ever seen in my lifetime! Fantastic presentation ❤️

[@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

[@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 ...

[@samsonimport]

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

[@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.

[@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

[@markparee99]

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

[@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?

[@robertcantu3565]

You did a great job of explaining the operation of the coil assembly, in the generation of the spark. I didn't know about the small circuit in the coil assembly. Thanks Robert

[@derpiper25]

Oh man!!! I’ve just found my favourite site. Excellent information and terrific presentation. This is the best!!!

[@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.

[@caduceus33]

Craig, you do an amazing job of explaining how things work, and of making great visuals to go along with them!

[@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.

[@patrickwendling6759]

Very cool.. 😎 I'm 57 and also wondered how a coil worked.. now I know.. that coil reminds me of my 1st mini bike

[@sollykhan2385]

A 'shockingly' easy explanation of the Lawnmower Coil Pack, thank you for posting this great video, Bless 😇🙂👍

[@TheRepairSpecialist]

Thank you so much. I really appreciate it. Craig 👍

[@sollykhan2385]

@@TheRepairSpecialist Bless 😇,please continue to post more awesome video's, 🙂

[@clarkg9805]

It just doesn't get clearer than that, a very informative video, thank-you so much for sharing.