Stihl 026 Chainsaw! Piston Is Scored! WHY? Let’s Dig In And Find Out!
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- čas přidán 20. 03. 2024
- This Stihl 026 chainsaw is in the shop for diagnosis today! Let’s find out what went wrong! Come along with Erica as she tries to find out why this chainsaw burnt up! She will test the tank vent and carburetor and also do a full engine vacuum and pressure test.
Stihl 026 260 261 - Auta a dopravní prostředky
Some shops try to steal your saws so watch out for them folks
She is a very smart mechanic and knows her saws she will never be slow and always busy 😊❤
Good job with your diagnosis of non running 026. This gives me incentive to attempt to repair my old 026
Thank you very much! Sometimes I watch other CZcamsrs, such as Mustie1, Diesel Creek, or Chickanic, and it gives me the kick I need to go get something started! :)
Really enjoy watching you start from scratch and work through all the possible / probable causes of the problem. I appreciate the way you tell us what and why you are doing things without relying on click bait along the way. 😊😊
I appreciate that!
Thanks for sharing Erica. I am very impressed with your thorough, calm, and methodically efficient diagnosis. Best of good health, prosperity, and long life to you and yours.👍
Thank you!
Thanks for the inspection. I have been keeping the air filter as clean as possible on my 026 but I didn't realize that it could be split for further cleaning. Good to know!
I bought mine new 32 years ago and it still runs like a champ and I use it 3 or 4 times a week on my property and carry it on my ATV to clear trails. Replaced the carb once and of course the chain over the years plus good maintenance goes a long way too It is a great saw to me and served me well.
Same here. My 32 year old 036 has been well used. Normal maintenance only in all those years. Recently put on a new 25 inch ES Light bar and wow what a nice match up.
My favorite Sthil the 026 is easier to maintain than the new saws
Another great video. Very detailed very professional
I appreciate you being here!
I would have checked the compression. I had a ms260 come in the other day that had a scored piston and cylinder similar to your 026. I checked the compression it showed 140 psi. Ran it for about 10 minutes and rechecked the compression with it warm, the compression dropped 10 Psi. I pressure vacuum tested it and it passed. The owner is going to keep running it until it won't run anymore. Only time will tell.😅 Awesome video hope you keep making chainsaw videos.
Thank you for watching!
Could that be stuck rings? As it warms up the bore expands. Normally rings keep it sealed but if stuck they may allow a gap to form. Just a theory.
Awesome video, thank you ,the screw on the carb might have come loose from vibration
Excellent job, looks like it had been straight gassed and the customer wanted you to confirm that! She probably loaned it to somebody and it come back in that shape!
Thank you for watching and subscribing! 😊
If you care anything about a saw, NEVER loan it out. You will get back junk.
@@joehead1294truth.
nice science experiment on an old 'junk' saw when it came in the door. What you found is an example of why shops say they will work on this type of saw but they really don't want to spend any time on it because they know the parts to replace it will often be more parts/labor cost than to buy new saw. Last shop probably had their summer intern Mechanical Engineer work on the saw
We don't mind taking a bit of time to do these diagnostics for people. Some folks want to know what went wrong and I will try to find out. I don't like the " BUY A NEW SAW" mentality - even though I sell new saws.
I much enjoy your videos and methodical way of working through problems. I was surprised an 026 still had good seals!
Thank you!
I lovely 026's. I got one of the last 260's. It ran like a dog. New 250's out ran it until I opened up the muffler like 3+ times the original size.
I also run it with the air cover off and adjust carb accordingly.
I run it hard!
Its fun!
Id love to get my hands on that saw and rebuild it
Yeah cylinders clean up easily and we can use a meteor piston. I just did that ti my 026 and it runs like new again! I got the piston kit and base gasket for 30 bucks. Cheap to have a great running saw again!
That's what I am going to do! Thanks for being here!
I bough a cheap sized MS260. Removed the stuck rings and cleaned the cylinder and piston. Put in a new ring, yes, one, only top ring. No base gasket. Saw has 150psi static compression and runs great.
i only have my laptop speakers , so your whole lesson was whisperjng cheers , again
Good job keep up the good work 👍
Thank you! I'll be back in the shop tonight working on another one! :)
Very informative, thanks for sharing. Barrie, Ontario.
Glad you enjoyed it
Can you explain the purpose of the impulse hose and how it works in one of your videos sometime?
Mystery solved. A leak in the carburator due to screw not being on tight. Nice analysis.
A top end rebuild with OEM parts is expensive. Especially when u have to pay a saw shop to do the work. Aftermarket top end kits are available and inexpensive if the saw owner has the ability to rebuild it themselves. It’s surprisingly not that difficult. I’m currently rebuilding an MS 361 that’s 18yrs old that belonged to my dad.
Excellent video, getting ready to put a new top end on my 024 as old stihls are better
Thank you very much much! I like working in the older saws.
I've got a 241(same as 024) lovely little professional saw
Yeah have one of those, it is a great little saw!
i had exact same issue with my 026, tough lil saw though...thumbs up !!
Thank you for watching! :)
Awesome video I too have two of those workhorses and starting a project on the third one
My name is Ian grant first time watching your channel.Just want to say I repair chainsaw and I just want to say that they are very good.Aftermath to chainsaw Parts out there not all of them.Is good.
I use Some of them and I never have no problem. I alias, tell my customers do use little more to strokes. Oil when mixing the fuel Why I'm saying this is because I use chainsaw.I Cut down trees also on the same thing I do. Makes my fuel a little bit Richer and I never had a problem
Great video, you're good with saws. It's nice to see! I have 2 026s, I love those saws. Maybe I should go do what you just did so I can keep them alive! 👍
Hi! Thanks for watching and subscribing to the channel! Today I have a Stihl 038 on the bench, stay tuned for more chainsaw vids!
great job
Thank you! 😊
Great video!
Thank you! :)
Scored piston could easily been from a lean mix or no mix at all for even a minute of run time!
Great job of diagnostic work would have liked to see a little more close up of the throttle disassembly but you were very good with explanation Thanks and God bless
Thanks 👍
New subscriber from here is SW France. nice in-depth video - thanks for uploading
Thank you so much for being here! See you soon!
Hello, great video. I just discovered your channel. I have the same exact saw which was given to by a friend. He got it at an auction for $2. It was completely torn apart, cylinder off rings stuck with bad scoring. Didn’t give it much hope but went through it, did a quick hone and got the piston cleaned up and I’ve been using it for the last 15 years, crazy.” Your results may vary” haha. I have two other 40 year old Stihls and use them often. Keep up the good work.
Thanks for the sub!
How did you hone it they have the chrome/nicasil plating
Enjoyed your video😊
Glad you enjoyed
Great video and knowledge you have. I use one of those magnetic metal dishes for screws, etc as I always used to end up looking for bits on the floor. Best wishes from across the pond 😊
Thank you! I'm glad to have you here!
Very cool 😎
Thank you!!
In the UK they were called Wood Boss, mine is 1886 that we bought in 1992. It does not get a lot of use, 5 years ago it needed some new plastic pipes for either the fuel or chain lube ?I can't remember which but other than one new chain it has been 100% reliable and enough power to take on heavy work Oak trees - genuine parts were still available a few years ago and may be today. Its starts reliably every 3 years and never needs the carburetor adjusting. It has an 18" bar and cuts anything I need it to with ease. Compared to a modern saw it probably uses a lot more fuel but I'm not a daily user. The plastic is all intact and faded but the saw will outlast me
You are so good
Interesting my dear
I'm behind in my video watching!
Like her much better than chickanic
Hi Bill, I appreciate you watching the video. You will see a mix of my husband and myself on this channel. I hope you enjoy! I'm working a Stihl 038 today. Stay tuned! :)
Ez rebuild on the 260.
"Not worth fixing but we'll keep it" We will do____________________________with it" Insert your guess in the comments lol!
"fix it and sell it!"
I'm surprised the engine held vacuum with a scored piston and one stuck ring.
I really wanted you to put fuel in and try to start it after solving the carb leak and the cylinder holding. Not expecting a miracle but I wonder if it would it run?
Hi! Thank you for watching!
A saw can get scored without a vacuum leak ie. tank vent issue, cracked fuel line , bad carb settings etc. Yes , I could have tried to start it but I’m not optimistic it would start AND I don’t want to damage it any further as I’m going to rebuild it and try to save the OEM cylinder. Stay tuned for that 026 to hit my work bench again! 😊
This is why i dont loan out none of my small engine equipment
Good idea! :)
I use the MS660 on the.Ms250
Put an aftermarket top end. Not as good as stihl but way cheaper.
I may do that, OR I may clean the OEM cylinder as good as possible and install a quality aftermarket piston. If I can save the OEM cylinder, I will. Thank you for watching!
Like your approach, I'll have a 251C and run it on 40/1 for better lubrication, unlike 50/1 Sthil recommends! What's your opinion on that and also should i adjust the carburettor for that since it runs a little more rich???
Worth mentioning, I only ru the saw for firewood when I go camping for cooking and stay warm at night 😊!
We run 50:1 mix, but we have lots of customers who do run 40:1 without any issues.
The old expression is, " Better mean than lean."
I would fix it. Put new cylinder, piston and both seals and boot.
If the customer approved the repair, I sure will! :)
Don't forget new chain, bar and sprocket! There's you dinner!
That is really good diagnostics! I was thinking the same thing when I saw the bubbles out of the carburetor, but also thought I didn’t see vacuum building when the engine was tested and thought crank seals. Had to look again when you said it was holding vacuum. Where did you find the plates to adapt and seal off engine ports? I could use some of those as well!
Hi! I really appreciate your comments! It's nice to hear something positive! The tools I used to seal off the engine all come from Stihl, and are very affordable! I can get you part numbers if you want :)
@@marriedwithsmallengines That would be great! I work on small engines all the time, but not for a living. It is a hobby of mine that borders on a profession. When I saw those adapters, my jaw dropped as they looked so professional, but I had never seen them before. Since I have a bit of education in machining and tool and die, I thought maybe I could make some if I had access to a lathe and a mill. But if they are Stihl parts, I’ll hop down to my local shop and order some! That is a handy thing to have with these types of engines! :-)
Here ya go! Thank you watching and Subscribing!
Intake Flange 5910 850 4207
Rubber 0000 855 8106
Ex. Plate 5910 855 4201
@@marriedwithsmallenginesThank you so much! I appreciate it! Will be hitting the local dealer here on Monday to get some ordered up. Hope you have a wonderful day!
I hope you do too! :)
Where can I find those tools you used to repair the chainsaw?
Do you have a bore scope for looking into not only cylinder thru plug hole but thru intake and exhaust then capture the vid and or pics?
New borescope is on the way!
please update and say what customer decided to do.......
😇😘merci et a bientot
I read a story about a fellow that ran a chainsaw shop in Washington state and his Dad before him. They said that before the 1970's a scored piston or cylinder was almost unheard of, only if someone mix the fuel wrong or not mixed at all. THEN all of a sudden they started getting countless saws only a few years old all scored and no compression. Do you know what happened in the late 60's?? They went from 16:1 or 24:1 mixture to 50:1. I restore outboards and restore 1940 and 50's motors with NO scoring either....16:1. Until the late 60's there was NO such thing as mixing oil or 2 stroke oil ....you used 30 weight regular motor oil. THAT is what the manuals called for. Also modern saws revv TWICE as high as old saws yet they say to use 1/3 the oil...WHY? To make sure your saw lasts a few years ONLY. Mix your saws 32:1 or NO LESS THAN 40:1 and your scoring problem will fix itself.
That all makes perfect sense!
varied reviews on this saw, mostly trending to a good saw..what do Tyler and you think of this saw? btw..great job with saw,,must have taught Tyler everything he knows..:)
The Stihl 026 was an excellent saw, sold in the 80' and 90's. The 026 was replaced by the MS260, then eventually the MS261 (todays current model), In our opinion, the Stihl 026 was one of the best production runs Stihl had. Thanks for watching!
Well worth mending meteor (Italian) make a decent top end (barrel/piston)
When testing the vent would it be wise to pinch off the vent tube to insure the tank and cap are not contributing to a leak down?
Depends on the model of saw. They all have different types of take vents.
Not worth fixing but we'll keep it ,yeah right 😮
Many scored saws run
Ah , neat disection... Taking a chainsaw Stihl says isn't worth fixing, but still wanting to know what specifically went wrong.
Does not look like the original carb?
Somebody forgot to put the oil in the mix and seized it 😢
My money is on she lent it out and they straight gassed it. Good detective work!
I’m going to rebuild this saw in an upcoming video! 😊
Looking forward to it! Me personally I hate Clamshell saws, good thing this one is not! I'd rather have a real removable and easily ported cylinder!
Now I’m just curious and I wanna ask: What would happen if the saw was run with pure gas? (That has to be a very common mistake, right? Forgetting to use mixed fuel…) I would think the lack of oil in the gas would make the engine overheat…and score the cylinder real bad due to the piston expanding…then possibly someone tried to fix it and loosened that carburetor and just put it back together real quick when realized the damage…so the leaking carb would not be the primary cause but just the result of troubleshooting…because in my opinion, a carb leak on the pump side would piss gas everywhere (as opposed to leaking on the other side would suck air, therefore running lean and burning it up (scoring cylinder and piston) Am I right?
Saya pernah punya stihl 056 mesin itu sangat kuat. Sayangnya parts nya susah sekali di sini.
Anybody know how I can find out what she's saying? Does she get it fixed?
Hi! The 026 needs a top end rebuild - which I will do in an upcoming video ! Thanks for watching!
a microphone would be handy , cheers
Must have been TDs shop
I meant air filter not fuel filter on how do you clean the air filter show in video please
where is the engine/serial number located ?
I would have just got a good aftermarket top end kit for it and rebuilt it.
That may still happen. It’s up to the customer. I have given her the option. Stay tuned , I hope to rebuild it for her!
@@marriedwithsmallengines I hope to see it get rebuilt. I’m the type of person to never give up on one unless I absolutely have to. Lol
Block is scored
I would throw a Chineesium motor in it and carry on.
How much would that saw be new....700.00? You can buy a GOOD QUALITY cylinder kit for 100.00 or a cheap one for 50.00 and a couple of hours will put it in. I don't think a new one is in HER interest.
Hi there. So, the customer wanted a newer, smaller saw and she got one. She wanted this one looked at to know 1. What happened to it 2. How much to fix it. It's up to HER as to where we go from here.
Probably ran lean because of the air leak or got some straight gas, piston and cylinder shouldn't be too pricey, as long as the crank and rod bearings are okay. Just started watching you but you seem to be a better mechanic than that other chick.
I don’t know if I would go that far! There are others which much more experience then me.
If the big end bearing is shot along with the barrel that's when it becomes a parts saw unfortunately
That was a boat anchor disguised as a saw. Not even the plastics are worth saving. Buy a new saw.
She bought a new one!
I don't agree mate 026 is a very good saw and well worth mending unless the crankshaft is stuffed also, as for not saving the plastics what are you saying is wrong with them
@johngibson3837 my 026 is from 88' and runs better than new saws
@@jakeowens1770 hey up mate thinking my first one is ten years younger but always thought it such a good saw, modern but built to last