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My Pioneer wants 24:1, the Jonsered 40:1, Stihl 50:1 etc.

Discussion in 'Chainsaw' started by hamlet_jones, Feb 2, 2017.

  1. hamlet_jones

    hamlet_jones ArboristSite Lurker

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    I'm using a Stihl branded oil, and mix it at 50:1 for my 026. My other saws have to drink what my Stihl is drinkin'...

    Will my 50:1 mix cut it for my Pioneer & Jonsered? My understanding is that the newer oils goes further than the two-mix
    oils used when these saws were first manufactured...
     
  2. ferris076

    ferris076 ArboristSite Operative

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    Use 40:1 in all your saws and ur fine
     
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  3. hamlet_jones

    hamlet_jones ArboristSite Lurker

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  4. Ryan'smilling

    Ryan'smilling Addicted to ArboristSite

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    Another vote for 40:1 across the board. Preferably a good synthetic.
     
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  5. SteveSr

    SteveSr Addicted to ArboristSite

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    Just make sure t hat you re-tune all of your saws for the 40:1 mix ratio. The carb sets the (oil + gas)/air ratio. More oil = less gas i.e. leaner mixture.
     
  6. hamlet_jones

    hamlet_jones ArboristSite Lurker

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    Yeah, I noticed my 026 idled faster on 40:1. Unfortunately, only the idle mix screw, so either go back to 50mix, or get a carb with 2 screws.
     
  7. SteveSr

    SteveSr Addicted to ArboristSite

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    Sounds about right. 40:1 has less gas than 50:1 so it is leaner which will increase idle speed as the idle mixture is usually on the rich side. This should be fixable with the "L" screw. However, you need to check the top end to make sure it still 4-strokes at WOT in the coldest (leanest=more dense air) temperatures that you expect to be operating in. You can also check the WOT RPMs with a tach if you have one.

    026's are pretty old and most are pre-EPA so I would think they should be able to handle 40:1. I would say to go look in the owners manual but the manual may be considerably older than your particular saw. Is your 026 a "Pro" version with adjustable oiler and decompression valve? Does it have a silver "Engine Family" EPA sticker on the rear handle shelf? Do you know the model of the carb that is in it?
     
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  8. hamlet_jones

    hamlet_jones ArboristSite Lurker

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    No, if it were a pro, I'd say so. Wish it were, for the adj. oiler alone. One owner saw.
    It'll 4stroke with 50:1, but not so much with 40:1. The "L" screw gave all it could
    when I did a partial muffler mod. If I get a two screw carb, then maybe 40:1 and
    I could finally open up the muffler all the way.
     
  9. SteveSr

    SteveSr Addicted to ArboristSite

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    Muffler mod should have included a carb upgrade. Put a WT-426 or a WT-194 on it and it will be much happier!
     
  10. hamlet_jones

    hamlet_jones ArboristSite Lurker

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  11. SteveSr

    SteveSr Addicted to ArboristSite

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    Your saw, Your money... The general consensus of Chinese AM carbs is that the quality is all over the map. A few have reported good results. Others have reported everything from DOA to running issues that make whatever hair you might have left fall out. And then what do you do when you need a kit for it? Call 1-800-China?
     
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  12. ChoppyChoppy

    ChoppyChoppy Addicted to ArboristSite

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    Have put China carbs in over 2 dozen saws in the last year, only had one come back, and it ended up being water in the fuel. Some ran perfect without any tuning, some needed minor adjusting.

    I'd think that's enough "consensus" for me to say they are worth the $20-30.

    A kit? It's the same kit the zama, walbro, etc carb would use. I don't bother with kits anymore. $10-15 for a kit, plus labor to rebuild.. makes it much cheaper to put a new carb, plus less headache.

    Edit... we do kits on $$ or NLA carbs.
     
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  13. hamlet_jones

    hamlet_jones ArboristSite Lurker

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    I just used the kit I bought the same day I bought the saw, 18 years ago. The damn needle was wrong, but the fuel diaphram was spot on, and that's all it needed to run top shelf again.
    But seriously, a carb rebuild kit for $8, or the whole thing new for $14 - 20 bucks? I'm trying to stay alive without going broke, and it just gets toughener every year.
     
  14. CTYank

    CTYank Peripatetic Sawyer

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    I've found it simplest with mix ratios to feed all my 2-strokes 89 octane e-10 with one of the best full-syn mix oils at 50:1. That's blower, polesaw, brushcutters and saws from 30 to 74 ccs. Not a problem- they're all happy, and the air quality is noticeably better than with more oil. Some of the engines drool mungy oil out the exhaust if fed a little extra oil.

    Some of them when new had mix ratio of 20:1 spec'd. That was for the crappier mix oils from back in the day. Sometimes less is more.
     
  15. grack

    grack Addicted to ArboristSite

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    40/1 red armor 4+ years since i bought it new echo 590. 20170204_174250.jpg
     
  16. grack

    grack Addicted to ArboristSite

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    Cylinder. 20170204_174226.jpg
     
  17. hamlet_jones

    hamlet_jones ArboristSite Lurker

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    Okay, let me open a can of worms: which is the best value syn 2cycle oil? How about Bailey's house blend?
     
  18. Michigan Escapee

    Michigan Escapee ArboristSite Operative

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    Amsoil 100:1 , oh, what's that burning metal smell?
     
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