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You'll Be Shocked This Stihl Chainsaw Runs! You won't Believe It! 

donyboy73
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You'll Be Shocked This Chainsaw Runs! You won't Believe It!
Recently a STIHL MS441 chainsaw arrived at the shop with symptoms such as "running lean", poor idling and difficult to adjust the carburetor.
Watch as I run this saw and show you the final diagnosis of what was wrong and you will find it difficult to believe that it even started!
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13 сен 2024

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Комментарии : 335   
@donyboy73
@donyboy73 3 года назад
Find out here why most Stihl chainsaws leak bar oil; ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rl-9PnXMDK4.html Watch my video on how to replace an oil line on a Stihl ms170/180 here; ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QiyXMXMXjZE.html
@yvescote9893
@yvescote9893 Год назад
That's just amazing that it was still pulling almost 150 lbs of compression. Speaks volumes of the quality and craftsmanship of Sthil
@cpcoark
@cpcoark 3 года назад
We learn from our mistakes. It is refreshing when people admit to mistakes so others can learn.
@HimBoys
@HimBoys 3 года назад
Hello sir, I also work as a mechanic, I have learned by looking at you, but I do not have the tools as much as you, I do the great work of someone else.Thank you sir, I am from India, Himachal Pradesh, I am from Kullu Manali, I have seen every video of you, love you sir, keep making such videos thank you
@donyboy73
@donyboy73 3 года назад
greetings from Canada!
@HimBoys
@HimBoys 3 года назад
@@donyboy73 Thanks you sir ji ❤️❤️🙏🙏🙏 lot of love
@micanopykracker902
@micanopykracker902 2 года назад
This guy is the shit huh??? He knows his business👍🏻👍🏻👍🏻 cheers from florida
@garrettstevensen2467
@garrettstevensen2467 3 года назад
I wish I could see this saw being rebuilt! Gosh, I would donate $5 at least to watch a 1 hour video on you doing a rebuild!
@donyboy73
@donyboy73 3 года назад
really?
@andrewford80
@andrewford80 3 года назад
Me too. Sign me up for the rebuild
@Paradise_Arms
@Paradise_Arms 3 года назад
Likewise
@billbkr32ify
@billbkr32ify 3 года назад
Seen that alot in weed eaters. The cylinder expands when it gets hot and there goes your compression. Did you check the compression when it was hot? Bet it would of dropped half of what it was cold. Great video
@SuperJamster1
@SuperJamster1 3 года назад
@@Paradise_Arms Me Three!
@robertforster9736
@robertforster9736 3 года назад
Great tip Donyboy. Removing the muffler tells the story. Previously my shop has wasted alot of time trying to find the problem. Now it's our policy on 2 stroke equipment to remove the muffler before doing anything. Amazing how much compression that saw in your video had. I used to go by that before, but not after watching this video. Thanks for the advice. Great following your videos 👍
@donyboy73
@donyboy73 3 года назад
good idea Robert!
@em4703
@em4703 Год назад
That wear is still not normal, even with thousands of hours of run time, the wear should be slow and a "smoothing" and thinning out of the piston skirts. Scoring should not happen if piston and cylinder is properly lubricated. It got that way either from the airleak making it run lean on fuel, or the gas-oil mixture didn't have enough oil. I would never put 50:1 in 2 strokes, only 40-32:1. I care more about longevity than what the environmentalists say.
@christophercolt1361
@christophercolt1361 9 месяцев назад
AND THE HITS KEEP ROLLIN'!
@noelhenderson8095
@noelhenderson8095 2 года назад
I have the ms 460 magnum ive had it 15 years i only had 1 time it didnt start i changed the plug it never misses a beat
@BrucesShop
@BrucesShop 3 года назад
OK The hole in the piston surprised me. Great demo. I can't believe it even ran. I have made the same mistake.
@donyboy73
@donyboy73 3 года назад
same here!
@Lone-Wolf87
@Lone-Wolf87 3 года назад
Oh boy I hope we get to see a rebuild in this chainsaw. Looking forward for it. 👍👍👍👍
@ski6712
@ski6712 Год назад
diagnosing my old 441 magnum /arctic firewood saw and this video really showed what to look for first . on my teardown the crank seals are exposed and are worn out next i am no going to taking off the muffler to see if there is a problem in the cylinder and then deciding if a reseal /repair /rebuild is needed as it is around 20 years of seasonal use with only clutch system parts ,bars ,chains ,filters, plugs. not sure the new ones are actually the way to go vs the cost of rebuilding what has been a basically trouble free saw 🤔
@green-zone36
@green-zone36 3 года назад
Great advise, Pull the muffler and check the piston and rings. I think the high compression came from the tremendous power in your pulling arm. Somehow you are converting pure brut strength into high compression. Keep the videos coming, still learning.
@darrellpickering8535
@darrellpickering8535 3 года назад
In 50+ years of working on saws of all kinds, I've never seen 1 with a hole in the piston but I have seen more than 1 with the piston dimpled/cracked from using an impact with a metal piston stop before. 1 other thing not related directly to the saw is the wear & tear on your shoulders from 50+ years of yanking on 'em especially the stout ones.
@100vg
@100vg 2 года назад
I had no idea that a chainsaw, and I guess pretty much any small engine, needs this kind of in depth checking and maintenance! I bought a Poulan Pro PR5020 that I still haven't used, but I'm going to have to remember this! Check for air leaks, cracked intake boot, loose cylinder bolts, etc. I'll have to learn how to do all of that. Do you have a video on this; the whole procedural annual check? Thanks for being you!
@ENDERTON2000
@ENDERTON2000 Год назад
amen! first thing I do to EVERY saw I service. also, if the saw is 20+ years old, automatically gets a pressure vac test. you can throw new carbs, filters etc at them all day and if they're sucking air, you're wasting your time
@carlmiller1034
@carlmiller1034 3 года назад
Awesome Don! Thanks for making and posting this video. Another great example of why to remove the muffler. I can't believe the saw actually ran, with the piston and rings in that shape!!!
@donyboy73
@donyboy73 3 года назад
I need to listen to my own advice lol!
@barrylee.freedman2203
@barrylee.freedman2203 Год назад
Yes, lots of videos covering ongoing saw maintenance but you quickly listed several things to check (air leaks, etc)I don’t normally see included. Maybe warrants another video. But then again I’m now rethinking saving myself time, money and frustration by not spending lots of money on pressure gauges and the rest. Can’t believe I’m saving this, but the writings on the wall, time to get a battery powered model. Money saved not buying tools would easily cover getting into a new battery and charger system.
@JeffinTD
@JeffinTD 3 года назад
Great video. Big diesels can also seem healthy and not show excessive blow by... until they get up to operating temperature.
@bobmcl2406
@bobmcl2406 3 года назад
This was great information, and a practical lesson on diagnosis. Seeing that piston reminds me that internal combustion is a frickin' miracle at times! Best wishes from Ottawa.
@donyboy73
@donyboy73 3 года назад
unreal eh?
@salvadornunez9609
@salvadornunez9609 Год назад
That was an awesome explanation, thank you Donny boy.
@Bungi81
@Bungi81 3 года назад
Hey Don, thanks for this advice! I´ve never seen a defective like this hole in the piston jet... Incredible that this saw was running. Greetings, Stefan
@DavesSmallEngines
@DavesSmallEngines 3 года назад
I knew this would be a hit! What a crazy sight to see!!!
@steveartese9014
@steveartese9014 3 года назад
The fuel ignited in the crankcase and blew a hole in the piston, Stihl is known for this issue, but I'm amazed it still runs 😂
@drslick1198
@drslick1198 2 года назад
I really liked the way you showed how to troubleshoot that problem. You videos are such a pleasure to watch because you kearn so much. Good stuff.
@AnotherUser1000
@AnotherUser1000 2 года назад
Same occasion with my Homelite CSP4518! Apart from the hole thingy... Awesome compression, new spark plug, new carb membranes, but when I removed the muffler... The absolute chaos in there!!!
@ClintsHobbiesDIY
@ClintsHobbiesDIY 2 года назад
The best advice vid ever about buying used chainsaws.
@tonym6920
@tonym6920 3 года назад
That is amazing. I guess that advice would be beneficial for really any piece of lawn equipment. Most people don’t run used equipment long enough for any symptoms to show up. Thanks Dony! 👍👍
@donyboy73
@donyboy73 3 года назад
absolutely, have a great weekend!
@OtisDavies-cv6ze
@OtisDavies-cv6ze Год назад
Very interesting and good advice. After everything the guy replaced, my experience would have gone straight to worn crank seals, of course a leaking jug gasket would have presented itself when diagnosing the situation. I would never have considered pulling the muffler and inspecting the piston, especially when you have good compression. I learned something new today and I am not afraid to admit that I can add that to my 30 odd years of learning and knowledge. Thank you for sharing that information with us.
@rpavlik1
@rpavlik1 3 года назад
Wow that is a massive beast of a saw. Looks a bit like the huge (German?) one my father in law has (has also done the firewood business, as well as doing IT for a small engine shop, saw was a gift from the owner's family after the owner passed, was apparently set aside to give to him for years). Interesting to see another cause of "runs badly when warm". Just fixed my leaf blower in the fall, had stripped crankcase screws. (And finally replaced the disintegrating asbestos exhaust gasket with one that won't give me cancer - amazingly that piston looked ok) Great video!
@turogkane5826
@turogkane5826 2 года назад
You can get even stronger Saws form Stihl :D but you dont want work withe that the full day :D the mostly used withe long swords for cut down trees than a smaler one to remove the branches
@michaelcook184
@michaelcook184 3 года назад
Good advice I allways take muffler off first thing to check 2 stroke
@johnclarke6647
@johnclarke6647 2 года назад
I spray all the areas that normally leak with break cleaner while the saw is running. If you have a leak the saw will stop dead when you spray it around an area that is leaking. I spray the carb and boot area, the base gasket flange and the oil pump and flywheel sides. The last two will check the crankcase seals. If anything is leaking, the saw will stop, immediately, so you will know what is leaking. This saves a lot of time pressure testing the saw with a Mighty Vac.
@johnclarke6647
@johnclarke6647 3 года назад
You are right - annual checks on well used saws are a must. That is why I have a Mighty Vac. I just finished building a 372 and it did not run for the first time without passing a leak down test. I have found one of the worst places for leaks on Stihl saws is the connection between the boot and the carb. I usually crank up my saws and spray break cleaner in this area to make sure it is still sealed. I like the system used on the 372 better than the loose coupling on the Stihl which is dependent to much on nut tension. And the condition of the boot.
@donyboy73
@donyboy73 3 года назад
absolutely!
@65csx83
@65csx83 2 года назад
Another top notch video. Never a wasted second; always informative.
@Michel-Artois
@Michel-Artois 2 года назад
Hi Dony, that confirms that compression test, manual by hanging (or with manometer), is not reliable, except when the saw falls easily, so rings are dead or oval cylinder or both. It often happens that piston and rings are scratched even with a good test . So you are right : we must take muffler off!
@tomriblett2979
@tomriblett2979 3 года назад
Always learn when watching a pro...thank you.
@JimFixIt74
@JimFixIt74 3 года назад
Great video Don! I was betting on the crankshaft seals or the cylinder bolts being loose. Just goes to show how you can’t be too careful when buying a saw. Wow I can’t believe that piston was in that shape with that compression reading. Crazy. 👍
@donyboy73
@donyboy73 3 года назад
I couldn't believe it either so it really threw me off and I wasted so much time on it!
@mscir
@mscir 3 года назад
Great advice that I would never have thought of.
@RG-wy1ol
@RG-wy1ol 2 года назад
Thanks for making this video very helpful and educational.
@martyleary4131
@martyleary4131 Год назад
Excellent advice!!!
@thinkingimpaired5663
@thinkingimpaired5663 3 года назад
Thank you for the good advice.
@donyboy73
@donyboy73 3 года назад
thanks, have a good weekend!
@stephengalante2973
@stephengalante2973 3 года назад
after seeing all the scoring and the hole in the piston its amazing it still even runs
@JDoupe
@JDoupe 3 года назад
Great video. Thanks for all the knowledge!!!!
@donyboy73
@donyboy73 3 года назад
thanks, have a great friday!
@nuffinpersonal
@nuffinpersonal 9 месяцев назад
Sometimes scoring on the exhaust side can be from overheating due to either the spark arrestor being clogged, or running the saw with a dull chain.
@zeke1eod
@zeke1eod 3 года назад
Came from Buckin's channel, awesome advice! Thanks for sharing, God bless
@Tsiikki
@Tsiikki 3 года назад
WOW! Amazing it worked that good.. Also in glorious 4K :)
@rutheniumguy5686
@rutheniumguy5686 3 года назад
It's happening to me with my 2 stroke snowmobile this winter. Nice video thank's for the advice.
@mr1pearl
@mr1pearl 3 года назад
Awesome information thanks for the tip ! Wow a hole crazy !
@donyboy73
@donyboy73 3 года назад
insane isn't it, this saw has paid itself many times!
@philipbreau1246
@philipbreau1246 2 года назад
Hi Dony, I have a Solo chainsaw that runs great when it's cold then runs badly when it's warmed up. I'm pulling the muffler. Thanks for this video.
@hondavtrvic
@hondavtrvic 3 года назад
Great advice about taking off the muffler.
@donyboy73
@donyboy73 3 года назад
I should have done it right from the start!
@marklubecke4854
@marklubecke4854 2 года назад
You really should listen to that Don fella, he has a lot of valuable experience.
@jimmurphy5739
@jimmurphy5739 Год назад
Good vid. Got an MS441 and really like it.
@xl130homelite3
@xl130homelite3 3 года назад
I have fallen for the “hang” test myself only to pop the muffler once home to find exactly the same thing. Great video!
@paullemay3218
@paullemay3218 3 года назад
This is awesome advice. Thank you for sharing. 👍🇨🇦
@buellrod
@buellrod 3 года назад
Wow I didn't see that one coming good job brother thank you once again
@austinebinger2194
@austinebinger2194 2 года назад
Our shop had a 441 come in with a larger piece of the skirt missing and it ran as well. It wouldn’t idle, but it will run at full throttle.
@ENDERTON2000
@ENDERTON2000 2 года назад
amazing, I'd have guessed pulse line
@tc3603
@tc3603 3 года назад
A most valuable vid for the consumer. Will save viewers from buying junk.👍
@cgrscott
@cgrscott 2 года назад
My chain saw is corded electric since I only use it about once every 10 years. Stihl is a good brand gas chain saw.
@DragonflyAcres2022
@DragonflyAcres2022 3 года назад
Thank you for the great information.
@paulmorrey733
@paulmorrey733 3 года назад
Thanks Don
@thebradleysoncatbirdhill6849
@thebradleysoncatbirdhill6849 3 года назад
Absolutely fascinating! Thank you for the continuing education, Don! 👍
@donyboy73
@donyboy73 3 года назад
Glad you enjoyed it!
@ciphercode2298
@ciphercode2298 2 года назад
I've got a 441c thats 10 years old and alot of firewood and chainsaw milling behind it. It's still running ok,but when I tuned it up this spring I checked the compression and it's down to 130psi. It's still got some life left in it but I'd love to see a rebuild video on it for when the time comes. I'd be torn between a $399 oem top end or a meteor kit for $150.
@michaelspencer301
@michaelspencer301 3 года назад
Unbelievable !! Amazing that it ran. I have had carbon scored saws act that way. But never had one that ran looking like that. Awesome video !! 👍
@donyboy73
@donyboy73 3 года назад
thanks Michael!
@danielleroberts8964
@danielleroberts8964 Месяц назад
I have this same saw. It feels like a cadillac of chainsaws. I hope the piston looks alot better than the one in this guy's saw!
@pierremichel6460
@pierremichel6460 2 года назад
Thank you for excellent advice! Once again I have learned potentially money saving tips from your videos.
@mikedee8876
@mikedee8876 2 года назад
wow.....that compression check would have led me down the wrong path.....thanks
@rverro8478
@rverro8478 2 года назад
Wow ! Excellent advice Don....Merci beaucoup !
@micanopykracker902
@micanopykracker902 2 года назад
That there is a good marketing tool for stihl. My goodness that thing should have even started let alone cut...i actually bought a used Husky...exact same thing happened to me . I knew my mix was right I cut maybe 2 hours with it and then I checked your video and Steve pull that muffler and it was and it was scarred up . I didn't have a dime-sized hole in the Piston but it still ran kind of..but still have good compression I couldn't understand it..would you rebuild that saw??? Seems like it would be worth it.... great video Donnie
@mishellgagnon5771
@mishellgagnon5771 2 года назад
What a video! Now that's my man; super super tip when buying a used chainsaw. So, I consider myself lucky 'cause I bought 2 and they're running just fine.
@barryiwashita6352
@barryiwashita6352 2 года назад
Good tip dony 👍🏼
@richardcranium5839
@richardcranium5839 3 года назад
never ever seen that. but it makes sense. my initial thought and it could be as well on an older saw is a case pressure leak. with the hole in the piston until the piston drops below the exhaust port it would vent case to exhaust. thus lower pulse pressure and reduced fuel. one thing to note on the compression guage- husqvarna in their manuals want you to use their guages. the hoses are shorter (like really short and smaller volume). first they only want 3 pulses to get the reading and second it eliminates a lot of pulling. any guage if you pull long enough will give you a maximum compression but with fewer pulls it makes compression loss from worn rings and cylinders into consideration.
@donyboy73
@donyboy73 3 года назад
good info, thanks!
@r3dpuma
@r3dpuma 3 года назад
You don't really need to take the muffler off. You cand just use a small flashlight and look through the sparkplug hole. Usually the scoring happens in the exhaust side and if the piston is scored most likely you will see scoring on the exhaust side of the cylinder too .
@RJLM330
@RJLM330 3 года назад
What about a bore scope
@eldonfoster2576
@eldonfoster2576 2 года назад
Thank you for the insight! I have a weed wackier that may have the same issue! I will look.
@happyday8422
@happyday8422 2 года назад
Well done.
@sergioszczuczko6958
@sergioszczuczko6958 3 года назад
Good diagnóstic stihl
@Leftatalbuquerque
@Leftatalbuquerque 3 года назад
My grandfather bought a Stihl based because the local hydro crew was equipped with them. It would never start for him. I took it twice to a repair shop in Sundridge. To this day, it Stihl won't start. It would make a good boat anchor.
@darrenpickens7147
@darrenpickens7147 3 года назад
If the seller doesn't want you to take off the muffler, they may let you take out the spark plug. You can usually see if the cylinder is scored with a bright pen light.
@adnacraigo6590
@adnacraigo6590 3 года назад
Excellent work. Thank you.
@donyboy73
@donyboy73 3 года назад
Many thanks!
@KensSmallEngineRepair
@KensSmallEngineRepair 3 года назад
I went to buy a couple saws and asked ahead of time if I could pull the mufflers. No problem in fact one saw was scored and I got it for next to nothing. But I have had sellers refuse so ask before you take a long trip to see a saw because not all sellers will let you take it off. The honest ones will. Great video. Simple things first!
@donyboy73
@donyboy73 3 года назад
good tips Ken!
@wingerrrrrrrrr
@wingerrrrrrrrr 2 года назад
Is it recommended to change the gaskets when removing and reinstalling the muffler?
@KensSmallEngineRepair
@KensSmallEngineRepair 2 года назад
@@wingerrrrrrrrr only of they are leaking
@arnenelson4495
@arnenelson4495 3 года назад
West Coast Muscle Saws has a video on this very issue. Excellent stuff.
@stevanperic9080
@stevanperic9080 3 года назад
I had a similar problem with Jonsered 2156 piston was bad burned, but chainsaw run exelent. Great video. Pozdrav
@oby-1607
@oby-1607 3 года назад
I've heard of a hole in one, but a hole in a piston. Holy.
@donyboy73
@donyboy73 3 года назад
lol
@ralphbadgley6617
@ralphbadgley6617 Год назад
I have a 034 stihl it works good I find it hard to get parts for it in Canada, and when I order from Amazon it's always wrong fit and where I take it to a mechanic they tell me cant get parts for it anymore is this a new sales pitch
@2035jim
@2035jim 26 дней назад
Wow that’s shocking I’d never guess it needs a top end it’s gotta wear and tear
@DesertDigger1
@DesertDigger1 3 года назад
Great advice, thanks Don!
@watermanone7567
@watermanone7567 3 года назад
Nice video. Did you end up putting a cylinder kit in it? Thanks
@donyboy73
@donyboy73 3 года назад
Not yet
@germancarfan
@germancarfan 2 года назад
That is the worst I have seen, crazy that it had so good compression. Good tip rather than wasting time, initially I was thinking crank seal
@joserivas4132
@joserivas4132 3 года назад
Thanks for the video don!! You help me a lot with your knowledge!!
@donyboy73
@donyboy73 3 года назад
Glad to hear!
@motoman5023
@motoman5023 3 года назад
Wow that will affect the scavaging never seen that
@joshadams6083
@joshadams6083 3 года назад
I'm glad you made this video cause I naught a husky 262 last fall and iv been having a lot of trouble getting it to run it's got compression but I looked at the exhaust side a few weeks ago and it's scored pretty bad. It was suppoaably just rulebuilt with new piston and rings and carb may be new aswell but cylinder is one. I believe I don't know how it got so scored the gas i put in was super rich
@jimmypopp2695
@jimmypopp2695 3 года назад
Awesome video!!!
@tadeuszmichaelwlodarczyk3120
Excellent video 👍✔️✔️
@terrythoffman9375
@terrythoffman9375 3 года назад
Awesome tip!! Thanks Don!!
@beingsneaky
@beingsneaky 3 года назад
So replace piston and cylinder. Get the 52mm bigbore kit.
@rayburnett3066
@rayburnett3066 2 года назад
We have a Bolins weedeater with a broken bolt on them intake side . How much damage would it cause on the piston ,amd cinlder if we continue to run it that way? It was made in 2020. The bolt is broken off into the block
@deanb3033
@deanb3033 10 месяцев назад
Even premium pump fuel in Canada now has ethanol in it. Alcohol burns hotter than gas, and will melt 2 cycle pistons. I only use synthetic premix fuels now like Aspen, or Stihls motomix. Fine for me as a consumer, but industrial users that can get pricey.
@kygtx
@kygtx 3 года назад
Awesome video just flat wonderful!!
@willf5768
@willf5768 2 года назад
Isn't it possible to look down the spark plug hole or even though the carburetor ?
@richardstrada212
@richardstrada212 3 года назад
Great advice. Thanks!
@donyboy73
@donyboy73 3 года назад
thanks Richard, have a great weekend!
@SW-lu9cu
@SW-lu9cu 3 года назад
Nice lesson learned donnyboy!
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