ArboristSite.com Sponsors
 
 


261 c-m running LEAN?

Discussion in 'Chainsaw' started by MountainHigh, Oct 28, 2019.

  1. MountainHigh

    MountainHigh Selective Tree whacker

    Joined:
    May 2, 2013
    Messages:
    1,642
    Likes Received:
    2,956
    Location:
    BC Mountains
    My new 261 c-m, with only a few tanks through it, was run dry on idle and drained after last use. Pulled it out to do some yard cleanup yesterday and filled about 1/4 tank of 3 month old non-ethanol 40/1 mix - Same non-ethanol mix that is running fine in my 562xp. 261 c-m started after 12 pulls, ran rough, then quit in the cut.

    After many pulls and no restart, I dumped the gas and put in 50/1 Premix. Pulled plug and it was a little wet but not bad. (Pulling the plug entails first removing annoying rubber dam held by 2 screws - WTF). Only way it would start was with toe depressing throttle and pulled a few dozen times (grrrrrr!). Sputtered, coughed and then ran lean, lean lean - REAL LEAN! NO burble out of the cut, just a HOWLING, screaming banshee! A little worried this thing is going to burn up. Is the carb so slow to adjust on this saw or is there a fault here?

    I wrote the reset procedure down somewhere but lost it. Any feedback on this little piggy?

    Any way around not having a purge bulb to get fuel to the carb faster on previously drained cold starts?

    My arm does not like having to pull 15 times to get this thing running.

    Yes, I know the saw start routine as per the manual, says to place lever in start position (only possible after first holding trigger open simultaneously) and then pull it over until it starts (or in my case, until arm gets sore and the swearing begins) :nofunny:
     
    chipper1 and farmer steve like this.
  2. farmer steve

    farmer steve outstanding in my field, 5150

    Joined:
    Feb 8, 2013
    Messages:
    15,990
    Likes Received:
    118,723
    Location:
    Stihl, PA
    I'll look when I get back to the shop at my manual. Not sure if reset procedure is in it. Real men don't read saw manuals. LOL. I just got mine and ran it for the first time Saturday . Less than a tank. I went to pull the plug for a look see this morning .I thought I grabbed the wrong scrench. I was able to push it through the hole and got the plug out. PITA. Guess I'll read the manual on plug removal
     
    chipper1, svk and MountainHigh like this.
  3. MountainHigh

    MountainHigh Selective Tree whacker

    Joined:
    May 2, 2013
    Messages:
    1,642
    Likes Received:
    2,956
    Location:
    BC Mountains
    I remember seeing someone post the reset procedure on a thread here somewhere, but I'll have another look at the manual as well. How is yours starting so far?
     
    chipper1, svk and farmer steve like this.
  4. farmer steve

    farmer steve outstanding in my field, 5150

    Joined:
    Feb 8, 2013
    Messages:
    15,990
    Likes Received:
    118,723
    Location:
    Stihl, PA
    I remember reading that too. Just checked. Nothing in the manual. Gonna be stopping by my dealer tomorrow and I'll chat with the tech. He's top notch. The manual says to just push the scrench thru tho rubber seal to remove plug. Don't even have a tank thru mine yet. It did get run a bit Saturday here at the GTG. Everyone liked it.
     
    chipper1 likes this.
  5. farmer steve

    farmer steve outstanding in my field, 5150

    Joined:
    Feb 8, 2013
    Messages:
    15,990
    Likes Received:
    118,723
    Location:
    Stihl, PA
    Just took it out and it started on 4-5 pulls.
     
    chipper1 and MountainHigh like this.
  6. cedarhollow

    cedarhollow ArboristSite Guru

    Joined:
    Jan 24, 2017
    Messages:
    663
    Likes Received:
    545
    Location:
    NE TN
    i was at dealer last week asking about doing reset, seems people vary on procedure
    but it sounded to me like you warm up saw shut it off, restart ,let idle 90 seconds, then shut it down
    and i think thats supposed to reset it
    but im a hobbiest not a professional
     
    MountainHigh and farmer steve like this.
  7. farmer steve

    farmer steve outstanding in my field, 5150

    Joined:
    Feb 8, 2013
    Messages:
    15,990
    Likes Received:
    118,723
    Location:
    Stihl, PA
    That sounds familiar. Thanks
     
    chipper1 likes this.
  8. MountainHigh

    MountainHigh Selective Tree whacker

    Joined:
    May 2, 2013
    Messages:
    1,642
    Likes Received:
    2,956
    Location:
    BC Mountains
    does your saw 4 stroke/burble a bit when lifting in cut? Mine seems to be running scary lean! Have to step away for a bit but will test it out some more tomorrow. I may pull the muffler soon to see if anything is scoring.

    I didnt get a new scrench with the saw, but my old ones sure won`t fit easily. Anything unusual about the scrench that came with your saw (question mark broken on my laptop).

    Thanks for kicking this around with me.
     
    chipper1 and farmer steve like this.
  9. farmer steve

    farmer steve outstanding in my field, 5150

    Joined:
    Feb 8, 2013
    Messages:
    15,990
    Likes Received:
    118,723
    Location:
    Stihl, PA
    I haven't run mine enough yet. My 462cm has some type of rev limiter in it and it kinda sounds like 4 stroking . I get you a pic of the new scrench in the morning .
     
    chipper1 and MountainHigh like this.
  10. super3

    super3 Addicted to ArboristSite

    Joined:
    Dec 30, 2007
    Messages:
    2,754
    Likes Received:
    1,355
    Location:
    indiana

    Start with cold saw.
    90 sec on choke, move switch to off without touching throttle.
    Move switch to run, start and idle for 90 sec, cut wood.
     
  11. cedarhollow

    cedarhollow ArboristSite Guru

    Joined:
    Jan 24, 2017
    Messages:
    663
    Likes Received:
    545
    Location:
    NE TN
    that reset procedure should be in a sticky
     
    MountainHigh likes this.
  12. Ketchup

    Ketchup Smells like 2-stroke.

    Joined:
    Nov 7, 2017
    Messages:
    447
    Likes Received:
    392
    Location:
    Boulder, CO
    What you describe is abnormal. Seems like you have a leak. Pull your muffler before doing anything else. Make sure to look past the top of the piston at the intake side of the bore.

    If it’s not scored, check your fuel line for a kink or hole. Test your filter as well. I know you said it’s a new saw, but check anyway. Look over all the mechanical carb functions as well.

    If all checks out, try a reset. If that doesn’t help, do a pressure and vacuum test. With a pass, I might suspect the M-Tronic system.

    Don’t assume it’s the M-Tronic components, but it certainly could be. A faulty solenoid could cause the problem you describe. Bad carb internals could cause the same behavior (metering lever, needle or diaphragm).

    I assume the saw is out of warranty. If not take it back to the Stihler and look angry.

    Hope it’s an easy fix!
     
    smokey7, catbuster and MountainHigh like this.
  13. blsnelling

    blsnelling Site Contributor

    Joined:
    Nov 8, 2006
    Messages:
    53,656
    Likes Received:
    32,584
    Location:
    Franklin, OH
    New saw you say? Take it back to the dealer!
     
    chipper1, Cope1024, catbuster and 6 others like this.
  14. full chizel

    full chizel ArboristSite Guru

    Joined:
    Feb 12, 2019
    Messages:
    635
    Likes Received:
    1,138
    Location:
    USofA
    Exactly!!
     
    chipper1, Cope1024, catbuster and 3 others like this.
  15. CR888

    CR888 Addicted to ArboristSite

    Joined:
    Feb 17, 2013
    Messages:
    3,573
    Likes Received:
    6,094
    Location:
    Australia
    This! You seize the saw & the conversation with your dealer won't be so pleasant, take it back ASAP before the problem esculates.
     
    chipper1, Cope1024, Whinbush and 6 others like this.
  16. farmer steve

    farmer steve outstanding in my field, 5150

    Joined:
    Feb 8, 2013
    Messages:
    15,990
    Likes Received:
    118,723
    Location:
    Stihl, PA
    Just talked to my still mechanic and that is the procedure for resetting.
     
    chipper1 and MountainHigh like this.
  17. svk

    svk A little bit of everything

    Joined:
    Oct 19, 2009
    Messages:
    21,658
    Likes Received:
    55,595
    Location:
    MN
    Right
     
  18. MountainHigh

    MountainHigh Selective Tree whacker

    Joined:
    May 2, 2013
    Messages:
    1,642
    Likes Received:
    2,956
    Location:
    BC Mountains
    Good advice - thanks for all the replies ... I'm taking it back today. Will let you know.
     
  19. Be Stihl

    Be Stihl ArboristSite Operative

    Joined:
    May 8, 2018
    Messages:
    142
    Likes Received:
    769
    Location:
    Pikeville, KY
    I have a 261C that is 1 year old and it also screams if I back off of it when noodling. Doesn’t really seem to do it during bucking though. I just assumed it was due to the M-tronic adjustments during long hard noodle cuts. But it does sound kinda scary, is it normal??
    Also mine won’t start cold with less than 5 pulls, always hits on 5th pull but nothing before that. Warm it’s not a problem, 1 pull.
    Other than those concerns I absolutely love the way it cuts, it pulls an 18” bar in hardwood with ease. Hope my observation helps someone.


    Sent from my iPhone using Tapatalk
     
  20. MountainHigh

    MountainHigh Selective Tree whacker

    Joined:
    May 2, 2013
    Messages:
    1,642
    Likes Received:
    2,956
    Location:
    BC Mountains
    Interesting to hear your experience with this saw .... I dropped my saw off yesterday and they are usually backed up so may take a while before I see it. Cold start on my saw has been disappointing from the get go (minimum 8 pulls) and it only got way worse.

    My habit has been to drain saws that are not used for a while but without a purge bulb, no purge seems to add to the number of pulls it takes to get this c-m saw going. My saw seems to have more issues than just a lack of purge bulb, but am all ears if there is any technique to cut down on the number of pulls it takes to get gas into the carb of previously drained 261 c-m?

    Wondering if putting saw in start position and letting sit for a minute or 2 before starting to pull might help on a healthy 261 c-m, or is it just pulling of the start rope that primes the gas?
     
    chipper1 and farmer steve like this.

Share This Page