HOW-TO Fix A Chainsaw With No Spark - Ignition Module Replacement

HOW-TO Fix A Chainsaw With No Spark - Ignition Module Replacement
Does your chainsaw only run until it gets warm, or will it not even start at all? It could be that you have weak or no spark at all at the spark plug.
Watch as I show you how to repair this problem.
Iginition module is Stihl part #1133 400 1350
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Easy to follow and thorough step by step tutorials, do it yourself (DIY) to help you with your broken lawn and garden equipment including snowblowers.
I do my best to teach you how to easily diagnose problems the fastest, quickest and most efficient way beyond just replacing a spark plug. These tips are for both the homeowner and shop owner.
Whether it be a handheld, two stroke, two cycle engine like chainsaws, weed eaters, string trimmers, grass trimmers, line trimmers, hedge trimmers, strimmers, weed wackers, brush cutters, leaf blowers, or four stroke, four cycle units like lawn mowers, lawn tractors, snowblowers, pressure washers, generators, ride on mowers that need parts installed or replaced, I’m your go-to guy.
My favorite brands of spark plugs are NGK and Champion.
I’ve been a small engine mechanic for many decades and also run my own repair shop so my videos are loaded with tips and tricks that I have learned and want to share with you. You will also find many tool and product reviews from top brands on my channel as well.
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[@donyboy73]

Does your chainsaw only run until it gets warm, or will it not even start at all? It could be that you have weak or no spark at all at the spark plug.

[@gasperajdnik5627]

I'm a mechanic 👨‍🔧👨‍🏭, I have 16 experereants. I have a chainsaw and I fix it some Times. I know how to repair small engines, cars, motorcycles. I love your videos 🤝8-)

[@jk30hussain]

My chainsaw stopped working since last week it has no spark,after disconnecting ignition wire it sparks a lil though. I would like to know what should be done next

[@zmanphx]

My Chinese chainsaw which is new has the same symptom. Run strong when cold then dies and won't start when warm. I replaced the carburetor. Same thing starts right up when cold. Why would coil fail when warm?

[@berylmohd]

@@zmanphx eB

[@zmanphx]

@@berylmohd what is eb?

[@PTSix-eg4zj]

I normally don't get into comments but I must thank you. I have a Stihl 012AV that most certainly had an issue with dying when it got hot. Your comment that the spark plug can contribute to this saved me! You cannot purchase an ignition module anymore for my saw...so I thought I would at least try the spark plug after your comment...it worked!!! Before the saw would fire up no problem, run great...then die once it was hot. I replaced with a brand new NGK, it fired up, it got hot, it got hotter, it screamed, it wailed...it did not die! Before getting a new module one must try a new plug first. Thank you for your help!

[@philipjean1086]

Love my ms261C but replaced both oil pump $120 and ignition module $170 in first 3 years. Have a 1984 sthil 028 wood boss only part ever had to replace was carb boot. I’m pretty handy fixing stuff but Donny your videos are the absolute best on you tube and are very helpful to me. Thank You

[@mikesmith1473]

Great video Dony, However, I would like to add one more tid-bit of advice. I have a Poulen 2250 that was driving me crazy. I had checked for spark and the spark plug was sparking fine but it would not start. Even with starter fluid it would not start. The carb was good, the gas lines were good, good compression, the spark plug was sparking but it would not run. Then I noticed an unusually large gap between the ignition coil and the flywheel. Why or how that happened I’ll never know. After I properly gapped the ignition coil the old 2250 runs like a new one. Thought I would share that with you so you can pass it on.

[@idkaybictd1]

Thanks for taking the time to upload. Managed to fix 'no spark' issue. It turned out not to be the ignition unit but a combination of bad earth and loose switch cable. You gave me the confidence to properly open up and investigate. Cheers from SCOTLAND!

[@WSmith2024]

KZbin is great; excellent videos like this allow us DIYs to save a lot of money. Thank you.

[@bedwards495]

Thank you so much for all your instructions! You've walked me thru three repairs so far and your step by step diagnosis and repair instructions are so easy to follow. So glad i didn't chuck my ms170 to the trash bin. I've probably cut about four or five cords of almond and fig wood since installing my ignition coil with your help. Again thank you.

[@frankdigiovanni4946]

I would like to add to my previous comment,what is really astounding about you is this you take the complex an make it simple!!!!👍

[@paintrock]

Thanks for all of these videos. Neither my MS180C nor my 026 Pro would start after sitting for a year. Using your diagnostic tips and some relatively inexpensive parts, I have them both up and running.

[@fredmartine674]

New subscriber here, I have a 044 Stihl chainsaw. Recently, it only ran when it was cold and shut down once it warmed up but now it won't even start no more. I strongly believe it's the ignition module, haven't replace that for many years. Thanks for the info video.

[@semco72057]

I liked the way you diagnosed the problem and fixed that chainsaw. I have a Stihl chainsaw which is hard to pull over and don't want to start for me. The saw have been in the shop several times and I still have problems with it. After the problems I have had my solution is to never buy another Stihl saw again.

[@marknye51.thefixitguy]

great video again Dony. I am working on a new MS261C m-tronic saw that has no spark. I also found that when the chain break is engaged you cannot pull the recoi. I pulled the break cover off and found one of the tension springs was broken. I wounder if that may have contributed to the no spark issue. I'll do some more troubleshooting and make sure it's the coil.

[@KerryBatdorf]

Excellent Help. Following your instructions to replace the MS 280 ignition module it now starts right up. However, at one point you mention starting problems could also be in some other part of the electrical system. Now, some time later after cutting a cord or two my saw will not TURN OFF when I move the switch to the OFF position. It sure would be nice to see more info about the other parts of the electrical system and what kinds of problems they might typically have.

[@tomkreye6674]

Another great and helpful video. I have this same saw and can’t figure out how to plug the hole for winter operation. Am I missing a part to cover the hole for summer?

[@360Prairie]

Excellent video Dony. Your production quality is right up there with DIY tv shows. It's obvious you spend a lot of time getting your shots just right, and editing the videos very well.

[@vytis3590]

I tested my spark plug using your method. It was just a bad wire connection to control module and that fixed my Husqvarna's saw starting problem. Thank you so much!

[@duracurvature]

Great troubleshooting video. Thanks for running the saw. Always nice to see the repair all the way through. For anyone passionate about IC engines, we always love to see them come alive.

[@stevestoyanac6993]

Thanks Dony! My saw won't start. No spark. The shop is two weeks out to repair it. But; thanks to you, I'll order a new coil kit and fix it myself and save a bunch of money by doing so.

[@richardboston2148]

this hus 240 has me stump no spark replaced coil/flywheel removed ground lead also check coil to ground new spark plug and still no spark turn flywheel with drill motor approx 1500 rpm and still no spark any suggestion

[@alort5358]

Doc I got a got a stihl fs80r trimer 4137 3401 and put a new ignition coil 4137 -400-1350 and switch is good but no spark? Thank you for the videos you doing a good job!

[@turn-n-burn1421]

Obviously I'm having these problems since I'm here. I have an MS271, but mine looks newer. I looked up both, ignition module, which I bought and searched coil. Photos online look like the same exact part. I anticipate mine is headed to a repair shop.

[@jasonpanozzo3317]

I passed silver school but your videos really help better than the modules on icademy

[@GregArnett-lo2ip]

I especially liked the tip about disconnecting the positive wire isolates it to the coil exclusively. That made me much more confident to order a new coil. Thanks!

[@PremierAccount-f5g]

thanks, is an ignition coil the same as a magneto? The retail shop said my ms250 magneto was bad.

[@martinjalbert7630]

You made my day after my Ms660 stopped working when hot. I thought I had flooded it, but no spark, I had a coil on hand, with your instructions it was back at work within 15 minutes. It started 1st pull the next morning. Thanks.

[@dansego3789]

Great video had no idea where the ignition module was and troubleshooting a grounded ignition,fixed myself on the farm saved me time and money thank you very very much Dan

[@clint4004]

I picked up a dolmar PS 420 that won't start only pops once..has spark. Immediately suspected the coil..checked flywheel key just to be sure...great video thanks

[@freddygill3425]

Great teaching! Very clear and no wasted time. Thank you!!!

[@mackjoe3978]

Thank you for the video. Great job, straight to the point with no rambling on how to replace the module.

[@speedygrasshopper9768]

Thanks, helped me quickly diagnose a Chinese 6200 62cc chainsaw where the on off switch was bad right new from the factory. Once I unplugged that black wire from the coil the spark plug was sparking while cranking. I'm sure that definitely means they don't do quality control or start each one up before packing them up. Anyway, ordered 5 new switches from ebay for half the price that one would cost shipped from a USA seller. While it's probably gonna take up to a month to arrive, I just turn it off with the choke, they turn off fine that way too.

[@dwoodog]

Thanks Don. The coil on my little MS211 seems to have gave up. This video was exactly what I needed.

[@paulhaines5755]

Awesome vid. Thanks! Think my 064's got a bad one. Runs good till hot, dies won't start. Now I'm at the point where it simply won't start and spark is present but seems kinda random or where you really got pull it to see it. I'll try the things you show here. Thanks!

[@BrucesShop]

These coils are expensive. I have been looking for an aftermarket. But no luck. Thanks Don. Great video. I recognised the part # in the your comments.

[@fred306801]

You make it look easy, sometimes things will fall into place and some times not so much.

[@danfriday1968]

Running saw & suddenly lots of smoke , now won’t start , no spark at plug . Do you reckon the module has overheated & needs a replacement? Is there anyway of testing it ?

[@tinyb69]

Is ignition module failure a known problem with the MS 270, MS 280 saws? I've had an MS 270 for at least a dozen years, and I just had to replace my 5th module. This last one cost $160 from the Stihl dealer. I use the saw, maybe, 6-8 times a year, so it's not like it's getting a ton of use. I'm just getting frustrated at having to keep replacing a module, when I could buy a brand new equivalent saw for 3 times the price of the module. I'm tempted to just buy cheap aftermarket modules, because, if nothing else, I'll feel like I got my money's worth if it fails in a year or 2. Any thoughts?

[@williamriedel1686]

Best no nonsense chainsaw tutorial channel.

[@roba9335]

Thanks, I did your test and unplugged the black wire and then checked and it had plenty of spark. I think the problem might be in the switch. Any videos on switch replacement/and further checking of the wires.

[@donhatcher9796]

After replacing the ignition module I tried testing for a spark by turning the flywheel rapidly using my hand. When I did not get a spark I assumed the problem hadn’t been fixed. Come to find out you can’t turn the flywheel quickly enough by hand to get a spark. Once I reinstalled the recoil starter I had a good spark.

[@garyreid9842]

Hi Don. I have a Stihl MS211/C chainsaw in Australia that I have to replace the flywheel on. I accidentally sheared the key on my old one when I was trying to remove the clutch by trying to remove it the wrong way. (I had a severe brain fade ) .. I now have a new flywheel and wonder if you need to remove the ignition coil first to provide clearance and the correct way to torque up the nut on the flywheel . I would follow your advice by using a business card to provide the correct flywheel magnet/coil clearance. If you know the correct torque specs it would be useful to confirm. I think 28 Newton Metres ?. I have been looking on your site for flywheel removal / installation but not having too much success. Any help would be much appreciated.

[@uncleputz2033]

On the Stihl 048 AV electronic chainsaw, what is the proper name for the circular part that is under the flywheel? and how do you test it to make sure it is good or bad. Thanks for your time

[@luksurias]

I was replace the seals on my stihl 025 and the piston like ur video u had on yt. I have no spark with credit card gab...about 1,10 mm. So on internet i figure out the gab must be for my saw 0,2-04 mm. Now I have spark but is poor. I try 0,20, 0,25, 0,30 mm gab but its the same. That means I have to change ignition kit? Ty

[@donyboy73]

possibly yes

[@rooster3019]

Donnie; my relatively new (maybe 3 gallons of fuel mix so far) Hussqvarna 572XP failed to restart after chain touch-up on hot day. Later, when cool, started fine. Thought it was vapor locked. Couple of days later, failed to start again when hot. No spark at spark plug, and no spark on inline spark tester when tester grounded to plug. BUT with tester grounded directly to saw's cylinder head it showed good flashes. The spark plug is good and strong spark in an other saw. I will try removing the + lead from coil, if I can find it; but I suspect bad module. What say you?

[@mrpoorboy64]

I have a Poulan P3314 chainsaw. I have a electrical problem with saw. Saw looks new, I'm going to have replace fuel lines and filter. What do I need to check or might need to replace with electrical problem?

[@overcomer8217]

Thank you so much for your time and knowledge. You have given me the confidence to this seventy year old timer to rebuild my Stihl MS180C. You do a great service. Denny, Caope Cod

[@martincastillo8357]

Hi Donnie. I have a sthil Ms 251. No spark after installing new coil, new coil and new spark plug. Can you help? Love your podcast. Thanks

[@amtpdb1]

Question, Several older family members cannot pull their lawn mowers due to compression.You earlier showed a compression release on a chain saw. Have ever heard of anyone installing a compression release in the head of a lawn mower? Due you have any suggestions? Thanks for the videos.

[@bt5526]

As you've done a video about a rev limiting issue with one in the past, I thought that I'd ask you about the OEM coil for a 2007 Stihl MS361. As you may recall, the coil in question is the Stihl 1135 400 1300. This is the third time we've had issues with this expensive ignition module (coil), so I was wondering if Stihl ever came up with a better coil for the MS361? If not, do you know of a coil that came in a different Stihl saw that's a suitable substitute for the 1135 400 1300? Thank you.

[@jplieurance]

Very good. You explain the process and reasoning very nicely.

[@darrenbergeson7037]

I have a question. I have a stihl 210c that had a melted clutch. So I ordered a After market gas tank/engine cover. The problem is that the holes that mount the ignition module are not the same. Any way of figuring out what updated module would fit in new saw body? Thanks for your help..

[@ramdanelimam7620]

Hello I have a chainsaw homelite 340, its coil ignition burns, I have not found on the market a replacement for the same model, can I use another model of a other brand? thanks for your vide

[@sokts5422]

I have the same problem with an echo kiuritz cs302! There should be a workaround on that...

[@johnmanning1006]

hay dony thanks for donate your time to help others, you make the world a better place.

[@jskaboo6400]

Excellent tutorial, I will try on my non-Stihl chainsaw as its not starting.

[@yogilours722]

Hello Donyboy73 thank you for your videos, I have an ms170 and the spark plug always carbonize and the air filter looks clean, I see bad combustion and the carburetor does not adjust, I wonder what is the problem with this saw.

[@donyboy73]

check spark arrester screen

[@yogilours722]

Thank you, it was completely plugged

[@reginaldharrison8650]

Dony thanks you so much I had a weak coil it would start some time had me question what was wrong. Your videos are easy to understand God bless you.

[@luksurias]

4:40 I dont know on witch side i have to put the paper to make space. Thank you for all video you share with us.

[@lostinmyspace4910]

My Stihl blower SH86c does not spark. The blue cutoff switch wire is also broken. Does that broken wire prevent spark at the plug? I personally do't think so because the cutoff switch hasn't worked for a long time and the machine still was able to start. I would flood the motor to get it to stop. Would the blue broken wire really prevent it from starting at this point? Thanks for responding back.

[@billhilt1226]

Great video. Does this apply to a MS 291?

[@100PercentOS2]

This video is one of the best I've seen in a while. I learned quite a bit watching.

[@allmountainsawrepair2241]

dony boy is a great technician.very helpful

[@coma3550]

Thanks Danny for making the universe make sense again. 😊

[@zchannela3962]

hi, followed all yr instructions, change the module, but still no spark. What should i look for then?

[@spudnickuk]

All good info. one bit you should mention , that is the Spark plug is a Resistive type and that if you use a none Resistive Spark plug or HT lead type then you will damage your control board.

[@carverindian]

Question I have a stihl 024 Av starts great runs great until you raise it above your shoulders then it dies out. Fresh gas it has . Dealer has it claims coil ignition but does it take 3 weeks or longer to get part?

[@allenletizia321]

I just got brand new Husqvarna 120 Mark II ran pretty good for half hour. Will not start now . I believe its coil. No spark . I disconnect the wire to the S/W no spark . You think it needs new coil?

[@siemonhg]

Great instructional video. Thank you!

[@JoshMcGrath98]

Thank you for the very descriptive video. I don't know small engines at all and all other vids say magnets at top, but don't say what they are. So thank you from a new home mechanic for the great video!

[@davidunderwood4341]

I have an MS 362 c ignition module replacement with only one spot to hook a wire. Unfortunately my saw has 2 wires. I see from this one in the video that one of the wires goes right to ground with the mounting screws. I guess I just don't know which wire is what, the red or the black. I understand which one represents positive and negative. Lost. I think the black wire hooks to the spade on the coil. But it confuses me because I thought that color represents negative. All the replacement modules with replacement wires shows the black with the spade and the red with the ring. input on this would be much appreciated.

[@doorguru168888]

I just rebuilt my MS271 replacing the cylinder and piston, the piston was badly scored and the cylinder questionable. I found an excellent OEM cylinder and piston on ebay. Once I got it back together, it had great compression, but it would not start.. I figured the cylinder had oil in it from when I assembled it.. I must of pulled it 100 times, removing the spark plug from time to time to find it was flooded.. Finally it fired and started up, running normal.. once I shut it off, it would not restart.. I noticed that when I grounded out the plug on the cylinder head and pulled the cord, I could not get a spark unless I pulled it real fast.. when I pulled it fairly fast, no spark. Could this be a weak ignition module?

[@treesplease4053]

Superb, clear advice, thanks very much, job done, my saw is back running so I am a happy boy again.

[@oldeagle1851]

Excellent presentation simple/short and clear.

[@ianparsons1257]

Do you not get a shock when holding the spark plug cap & pulling the cord ?

[@johnkosheluk1041]

I am a stihl tech i like how the inside of the saw was clean

[@vermbird8393]

my old homelite xl has no spark. new spark plug change ignition module, carb looks clean what do i do next?

[@cliffsteele979]

I have the same saw and exact problem. I installed a new ignition coil and still no spark? Weird. What else could cause no spark

[@McKlusky2012]

thank you for showing us how easy it could be to find the reason with ignition problems! Great job !

[@mercifulmama]

You are a excellent teacher - thank u 4 your help & God bless u :)

[@Jocabod]

Hi, Thanks for your great videos. I've been restoring a Craftsman 18" 42cc saw. It looks to have had very little use but the fuel lines were disintegrated when I acquired it. I replaced the lines and it started and ran rough for 30 seconds or so then it died and would not start again. I replaced the spark plug and nothing. Because it had started I didn't think it was electrical so rebuilt and cleaned the carb. Still nothing so finally checked for spark and nothing using both spark plugs. So I ordered a new coil which fits but the terminal was different as was the angle on the spark plug lead cap.which made it tight to put the cover on. Still wouldn't start and no spark even with the new coil. What should I check/do now?🤔

[@MissouriOldTimer]

I've had the spark plug close to the opening and pulled the rope, it does make a pretty good flash when the fuel ignites..lol

[@viperstrike3827]

I have lost arm hair from that!

[@thomasdingo5191]

Thanks, great video very well done. I can go and replace my coil with confidence now.

[@gregorysanford1610]

Donny I replaced the plug and coil it's getting fuel but no spark what do you suggest???

[@corbinhall8898]

Great video, I have an 036. I was having all the symptoms you described so I thought we were on the right track. However when I removed the positive from the coil I had spark. I checked the rest of the wiring and found frayed area and repaired it contacts with the switch also looked solid. Still no spark. I’m not sure where to go from here, any suggestions for me? Thanks

[@bobhorton1022]

Have you got your saw running? I got a sthil 031av with no spark and a diacontinued coil and no cross match coil.. i think im going to try n put a smaller coil on n drill new holes...

[@lmalino695]

On an older unit which has points which may be problematic, is there an easy way to determine whether the coil is the problem without having to to go all the way into the points?

[@jimmyduggan323]

Precise and explained simply . Top job :)

[@garymacario270]

Hi Don like your show and skill ,My problem is I have a Mantis 7222m and need a new coil.but was told that they discontinued that coil .Said check with an echo shop tofind the part ,still having a hard time where should I look ,Thanks and God Bless

[@donyboy73]

I have a hard time locating them as well. do you have a part number?

[@benjaminpaysse9704]

What if I have spark outside of hen test and add fuel to cylinder and it still won’t fire up ? Would that still be an ignition coil issue ? It’s brand new plug and clean ethanol free fuel I’m using.

[@curlykipper]

great video and super presentation skills. To the point, clear explanations and FREE. Thanks a lot.

[@johnclarke6647]

One of the first things I check is the position of the bayonet lug on the end of the spark plug wire. These can be undone by users pulling the spark plug wire, haphazardly. I usually take my carb adjustment screwdriver and insert it in the boot and feel for the bayonet lug in the bottom of the boot. A lot of times it has been pushed back down the end of the boot where it can no longer connect the spark plug If this happens, I pull it out of the boot , connect it back on the spark plug wire and inset it back into the boot and re-check it for spark. A lot of times this fixes the problem, sometimes not. I then troubleshoot the coil if I still do not have spark, but this is my first check. .

[@todddra]

Nice video. Informative, high def, good camera work, Good naration. Thanks!

[@peterlambert-gorwyn6065]

Really good, helpful and informative guide. Thank you

[@seahippies]

Thank you for the help mate - from Australia *use a playing card 'guage' by the verniers it was 0.9 I'm getting 2 years from $14 coils from eBay - Carbs for the lower end MS series under $20 as well compared to the Stihl 'Genuine' parts.That genuine coil in OzTralia is about $80 USD

[@VoteTeaParty]

Excellent job with the "zoom ins" you should contract out to Canadian and American industry.

[@Tony-Waldron]

Great video, easy to follow and understand.

[@timberwrightsvs480]

Hi Dony ~ I came here to watch you install a Stihl ignition module, but, while I'm here, I thought that I'd ask you about another problem that we're experiencing with our older (circa 2005) Stihl MS361. We bought the saw brand new and, after a few years of happy use, it began losing chain bar oil. The leak isn't apparent when running the saw -- it only seems to be an issue when it's stored. At this point, we empty the saw after every use and store it on top of a plastic tote lid with beveled edges. As you can imagine, this is a real inconvenience that we would love to correct. If you have any thoughts you would care to share about this issue, we would be most grateful to you. Thanks for taking the time to create these kind of videos.

[@donyboy73]

i start by replacing the cumbersome oil cap and if it still leaks i replace oil line

[@robertaguirre8054]

Thanks a lot brother have a blessed day 🙏

[@cliffperrino3015]

poulan pro 262 pro series, new coil[ just like the one on a Stihl] gapped to .015 no spark, any ideas? All new fuel hoses last year, fresh fuel,cleaned and gapped plug, saw looks like brand new!

[@angelas622]

check to see if the coil is dirty. When I took off the coil before ordering a new one, i found there was so much dirt built up on the coil 'foot' or whatever it's called that it wouldn't make a spark. After cleaning and reassembling, the plug sparked so loudly it surprised me.

[@bartdepauw1156]

Any idee why these ignitions typical stop working after about 5 min use ? I like to know/understand the physical problem occuring in the ignition coil when warm ...

[@daryld6046]

Dony; I acquired a Homelite CSP3314 chainsaw recently. No spark. In my attempts to resolve this, I replaced the plug, replaced the coil, gapped the coil with a bus. card and just a piece of paper, and disconnected the plus wire from the kill switch. each was an individual change/test and after each change I still had and currently have no spark at the plug. Ive tried grounding the plug to the cylinder and I've tried a plug tester. No spark and no light. All the research I've done indicates that changing the coil will solve the problem. But here it didn't. And it's a brand new coil. So what else might be the problem?

[@t8283287]

I'm having the same issue with my mcculloch. It's driving me mad, new ignition module and plug..no spark....all checks out..no short circuits...just no spark.....I nearly launched it across the road today....I am surenit is shorting out somewhere but cannot figure out why...should the ignition module be insulated from the barrel it is attached to???

[@meymoto4810]

I ordered a new coil and plug, still don't have spark. Bad coil from factory possible?