I watched your vid, you need to take the slotted screw that you can see when looking in through the grille of the muffler, remove it and then loosen up and remove the spark screen. its likely plugged up solid with carbon.
More Stihl 026 woes
- Thread starter norry
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Roll Tide
Trolltide
I doubt its running lean I can see smoke and sounds like its loading up.
Roll Tide
Trolltide
Stihlofadeal64
Addicted to ArboristSite
Testing Data from Stihl states:
Tuning RPM at full load (H screw): 14,000
- chain saws with bar and chain
- FS units without cutting attachment
I did not see a "no load RPM" Did you get the information from somewhere else?
I must admit that that the solution to your problem may be to find another mechanic to work on it, starting from square one. Walk away from it.
norry
ArboristSite Lurker
Aw, man! I'm embarrassed to admit this was the right answer! Since I was testing it with the chain off, I didn't think about the position of my chain brake, which was indeed very much ON.
Fired it up and it did rev a lot better with the chain brake disengaged. I don't think it's revving to 14k but since I don't have a tacho, I'm first going to put it back together w/ a bar and chain and see how it cuts.
Thanks for your patience, guys!
P.S. Air filter and muffler were both things I suspected, too. The air filter does work properly when not on the saw, and the mesh in the muffler is clean.
norry
ArboristSite Lurker
So, things I learned:
- Use fresh mix
- Check your work when you rebuild the saw
- Alcohol does not belong in gas mix
- Use fresh mix
- Check your work when you rebuild the saw
- Alcohol does not belong in gas mix
Working on these things is a good way to learn, I had not seen where you posted that the muffler screen was checked out and was determined to be clean. I have bought a few saws for cheap that all that was needed was the screen pulled.
bikemike
loud pipes save lives
Jackssmallengine has a stihl data sheet most all saws are listed with a stihl spec sheet bore stroke rpm plug gap all that good stuff
13K is usually enough at WOT. Hey, we all make mistakes. You should see what an 084 can do to a chain brake mechanism and the clutch at WOT.
Stihlofadeal64
Addicted to ArboristSite
Hey hey hey! 
are we rolling now!
bikemike
loud pipes save lives
Well then tune the top end for the best cut. 026 and 260 make the power with rpm.
Stihlofadeal64
Addicted to ArboristSite
Did we get the carb adjusted after the chain brake was released? 
bikemike
loud pipes save lives
Ok now that i looked back it does say 14.000rpm stock. Mine is not stock and it holds about 16.800 a bit rich. Thats what the tach said with the dodgegeeks taching the saw the went a smidgen leaner till my saw cut strong with no overheating issues. I dont know what the load rpm was but when i come across a tach il post it
norry
ArboristSite Lurker
Did we get the carb adjusted after the chain brake was released?
Started to, not there yet though. Wish I had a tach.
Stihlofadeal64
Addicted to ArboristSite
That saw is smoking at 16.800. What fuel mix ratio are you using. Just curious. I am assuming the saw is ported, (I may have missed that)...
bikemike
loud pipes save lives
Its got some porting no squish work i am running 40.1 mix syn blend 93 octane
bikemike
loud pipes save lives
A tree monkey saw the dodge geeks have will turn 18.000
Stihlofadeal64
Addicted to ArboristSite
Would love to see the video of the saw running. Sounds like tree monkey has built quite a saw. I believe he is a reputable builder here on AS, perhaps the others can chime in.
bikemike
loud pipes save lives
It is on the Brainard Wadena gtg in a vid
