026 carb question

[Mad Professor]

Hi folks. Joined up here last fall and have not posted much. See some framliar faces from the AS website.

Question concerns a 026 I will be working on. It's an early one I got for free along with a 056M I purchased. Looks to have been straight gassed or abused in some other manner but overall a complete and pretty clean saw.

It has a carb without a Hi adjustment and I want to change that. I know the best replacement would be a new WT-194, but money is a little scarce right now. I have a 024S parts saw that has both Hi/Lo and I'm wondering if that would feed things O.K. after I freshen it up. I think it might be a Wt-110? I guess there is a chance it could be a WT-194? The parts saw is at my other place so I can't pull it right now to get some numbers off it.

I did a search and found the thread in the tech section with the Walbro carbs but no listings for the WT-110. I need to download those files. Lots of good stuff in that tech section.

Anyway , does anybody know which adjustable carbs they put on the 024S? And if the jets/venturi are enough to feed a 026? I don't plan to mod it much, clean up the ports, set squish, and open up the muffler a bit. I have a NOS 44mm P/C for it.

 

[jmester]

Stihl ran a wt-22 on the 024. It has both adjustment screws. I ran one on a 026 with no complaints.

 

[Mad Professor]

Stihl ran a wt-22 on the 024. It has both adjustment screws. I ran one on a 026 with no complaints.

I just checked the tech reference area. One of the charts show the WT-22 on both the 024 and 026. So should work.

I checked venturi size and it shows WT-22 12.7mm, a little smaller than the WT-194 13.49mm.

I need to pull the carb and get some numbers off it, but won't be able to do that for a few days.

 

[jmester]

Someone here may have an wt 194 they are willing to part with. Maybe post a wanted ad.

 

[stihl_head1982]

I just checked the tech reference area. One of the charts show the WT-22 on both the 024 and 026. So should work.

I checked venturi size and it shows WT-22 12.7mm, a little smaller than the WT-194 13.49mm.

I need to pull the carb and get some numbers off it, but won't be able to do that for a few days.

If the WT-22 is in working order it should work fine. Some of the Chinese clones off Ebay are decent. Sometimes the quality can be touch and go.
If it doesn't work you can always send it back. At times you can get one for $15. shipped. I'd rather have the Walbro though. Much more reliable.

 

[drf256]

The WT-22 will run fine, but you need the bigger 194 carb for the best performance. The China clones are OK and the bores are all most the same size as the 194-they differ a bit.

I’m not sure why Stihl put them fixed carbs in saws, especially the PRO models.

I just swapped one out on this beauty.

 

[Basher]

Every 026 I own gets the WT194 due to its adjust-ability, they need the bigger venturi after port work.

 

[Basher]

The WT-22 will run fine, but you need the bigger 194 carb for the best performance. The China clones are OK and the bores are all most the same size as the 194-they differ a bit.

I’m not sure why Stihl put them fixed carbs in saws, especially the PRO models.

I just swapped one out on this beauty.

View attachment 285280 View attachment 285281 View attachment 285282 View attachment 285283 View attachment 285284

I have had a lot of these saws pass through here but this one is in nicer shape than any I have handled, sweet saw, looks brand new. Someone took great care of it.

 

[merc_man]

This may be little off topic but are some of these 026 saw kind of finicky. Wondering if its do to carb maybe? So out of the four 026 we have ( mine my sons and my BIL) mine seems to be the only one that runs flawless. Only difference is mine is the pro modle and i replaced carb with aftermarket one so I could muff mod it. The other three seem to run great one day and finicky the next. I just put a carb kit in my sons so have to try it yet to see if it helped it.
All saws have been pressure vac tested and passed. New fuel line , impulse and BIL 2 saw have new crank seals as well.

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[drf256]

This area seems to be a common issue for pooling. The worst I’ve seen are the plastic badge 026 standard Mahle jugs (decomp boss area case but undrilled). It will cause fuel puddling at idle followed by eventual stalling or a bog upon goosing the saw. It needs to be smoothed and matched to the saw.

 

[drf256]

I have had a lot of these saws pass through here but this one is in nicer shape than any I have handled, sweet saw, looks brand new. Someone took great care of it.

This is a saw I bought off the original owner. The man is 74 years old and wanted it ported, which I did. He couldn’t start the saw, mind you he is 6’4” and 285 lbs. He called me and came to me with the saw at least 10 times, he just couldn’t get it and when he could he couldn’t tune it. So I swapped him out a ported 261CM. I just couldn’t take it anymore and actually lost money to just make him go away.


He called and came when he couldn’t start that one either, I told him he needs to go buy an electric saw. Both saws started and ran flawlessly for me. He was pulling the saw over like a wimp because he was afraid that he was so big he would break it if he pulled too hard.

 

[Backtroller]

That’s awful. I’m sure that a battery saw will serve him better and keep him out of your “hair”

 

[redline4]

He was pulling the saw over like a wimp because he was afraid that he was so big he would break it if he pulled too hard.

Can't be scared to give it a good pull..

 

[RI Chevy]

Maybe one of those Dolly EZ start saws would do him good?
026/260s are very finicky to adjust and idle well.

 

[merc_man]

Can't be scared to give it a good pull..

View attachment 285664

My son is good at doin that.

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[Basher]

This is a saw I bought off the original owner. The man is 74 years old and wanted it ported, which I did. He couldn’t start the saw, mind you he is 6’4” and 285 lbs. He called me and came to me with the saw at least 10 times, he just couldn’t get it and when he could he couldn’t tune it. So I swapped him out a ported 261CM. I just couldn’t take it anymore and actually lost money to just make him go away.


He called and came when he couldn’t start that one either, I told him he needs to go buy an electric saw. Both saws started and ran flawlessly for me. He was pulling the saw over like a wimp because he was afraid that he was so big he would break it if he pulled too hard.

Al, I had a very similar interaction with a local fellow , older gent but not frail, former heavy truck mechanic. He had me go all over his 026, new fuel line, tank filter and rebuild the WT194, sharpened the very dull chain ,saw ran mint so I dropped it off at his place. A couple weeks later he stopped and asked me what would make the 026 start so difficult so I told him the general things to check and away he went. Couple weeks later he was back to tell me nothing I told him made it any better so I told him drop it off and I would take a looksee again. Couple weeks later he did drop off the saw, I smelled the fuel and it was old and stale smelling, dumped it and filled with fresh, several pulls over and the saw started up, ran rough for a min and then picked up the new fuel, smoothed right out and after a couple of blips it was running very well, didn`t have to even change the tune. Dropped it off to him, showed him how to start it and he said thanks and took the saw inside. Next day he called me and he could not start it again. I was busy that day but he called 5 times and was adamant I broke his saw. The next day I drove over to his place and said, let me see you start the saw. He didn`t want to show me but I insisted until he then placed the saw on the ground, put his foot onto the airfilter cover and bent down and gripped the cord with both hands . He then would slowly stand up and the engine was turned over so slow it was sort of like puck, puck, puck until all the pull cord was out, bend back down and repeat. After watching him do that 3 times I stopped him, took the saw and gave it two drop start pulls and it roared to life.He couldn`t pull it over fast enough to start it so I ended up with it, I gave him a new corded electric chainsaw and he has had no issues since. I actually never made anything off all this deal , the 026 is well used but at least he can cut a stick or branch around his place and not leave the saw sit with old rancid fuel in it.

 

[Basher]

This may be little off topic but are some of these 026 saw kind of finicky. Wondering if its do to carb maybe? So out of the four 026 we have ( mine my sons and my BIL) mine seems to be the only one that runs flawless. Only difference is mine is the pro modle and i replaced carb with aftermarket one so I could muff mod it. The other three seem to run great one day and finicky the next. I just put a carb kit in my sons so have to try it yet to see if it helped it.
All saws have been pressure vac tested and passed. New fuel line , impulse and BIL 2 saw have new crank seals as well.

Sent from my SM-G950W using Tapatalk

Does your saws have the fully adjustable carbs on them. I find the only carb worthwhile on the 026 and MS260 to be the WT 194. Most of the early 026 saws came with 194`s on them around here and each one that comes my way gets a new OEM 194 put on it.

 

[merc_man]

They do all have fully adjustable carbs. My pro 026 never when I got it but has a aftermarket fully adjustable carb now.
Not sure what carb modle is on my sons

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[merc_man]

This area seems to be a common issue for pooling. The worst I’ve seen are the plastic badge 026 standard Mahle jugs (decomp boss area case but undrilled). It will cause fuel puddling at idle followed by eventual stalling or a bog upon goosing the saw. It needs to be smoothed and matched to the saw.

View attachment 285657

I am gonna pull the jug on my boys and see if it has that lip. Had it out today and his dont like to idle very long and if you tio forward it stalls pretty quick.

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[Basher]

Let us know what carb and what cylinder is on your son`s saw? I may just get interested enough to check out all the spare cylinders I have sitting. All the cylinders I have on running saws are ported with ground intakes, I can check the carb boot to cylinder mating surfaces, will cut off a rubber intake boot close to the cylinder mating flange to see if there is a gap there. It just seems strange there is so many cases of this out there.