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MS261cm bar question

Discussion in 'Chainsaw' started by Fisherpilot, Nov 27, 2019.

  1. Fisherpilot

    Fisherpilot ArboristSite Lurker

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    Good afternoon

    I recently bought a used 261cm that came with a stock 20” bar. I’d like to put a 18” bar on it and am leaning towards a Tsumura 18” light weight bar and maybe a 3/8 chain. Prob is that I’ve run a saw a fair amount but never made any changes to a saw. Always kept “as is”. Currently a 20” stihl bar (.325 and .063). I think 81 links.

    I’ve done some searching online but am a little confused. Found a 18” bar but don’t know if my sprocket would work with it. Tried the search function on the site but am still new to it so I’m sure I’m doing it wrong. I’m guessing I would need to replace the sprocket.
    Any recommendations or links so I can read up and educate myself would be much appreciated

    thanks
     
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  2. vortec325

    vortec325 ArboristSite Operative

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    If you want to run 3/8 chain you will need to replace the sprocket . I have a 261 with the 18” 3/8 combo . I like the setup a lot


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  3. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    If you want to switch you’ll have to replace the sprocket yes. I run a 3/8 050 18” guide bar. It’s 66dl. Lots of guys stay with the 325 but do what you like. Like I said, I run the 3/8 and it runs great so I’m all for it
     
  4. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    Beat me to it. I second this
     
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  5. vortec325

    vortec325 ArboristSite Operative

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    I’ll have to agree with your also haha I actually wasn’t very impressed with the
    .325 pitch on this saw . Even after I filled the gullet of the chain out and took the rakers down a little more than the gauge recommended you would have to “force” it to cut good . Now it bites itself in and goes to work . Gotta be a little careful in the hardwood . It’s easy to stall the chain in the good hard beech


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  6. Fisherpilot

    Fisherpilot ArboristSite Lurker

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  7. vortec325

    vortec325 ArboristSite Operative

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  8. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    That’s the exact bar I’m running. I run Stihl chain on everything unless i got it with a saw. Think I have a couple Oregon. Actually have square ground on it currently but round ground waiting at the dwaler
     
  9. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    [​IMG]

    Not the best angle but it cut that log without issue
     
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  10. Fisherpilot

    Fisherpilot ArboristSite Lurker

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    Awesome. Do you run a full chisel chain with it?
     
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  11. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    Yes sir I enjoy full chisel unless it’s just bad dirty old wood. I carry extra chains so I can swap them out frequently if it’s dirtier. And practice hand filing
     
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  12. vortec325

    vortec325 ArboristSite Operative

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    Big difference between square and round ground ?


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  13. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    Supposed to be about 15% faster I believe and of course that varies but it also dulls even faster in dirty wood. And it’s a lot harder to file. I got it mainly to learn and practice filing. I’ll be running mainly round. But I do really like running the square
     
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  14. vortec325

    vortec325 ArboristSite Operative

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    I gotta look it up sometime . Same idea as sharpening round or is it a totally different process ?


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  15. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    I’m still very new to it so mainly just reading knowledge on my part. It takes a serious understanding of how the cutter works and takes more exact angles and corners. Supposed to be way more difficult but if you can get good at it it’s supposed to be very rewarding. So I see it as my new challenge. Want to eventually get a grinder for it as well but that’s a bit expensive too. Probably look for a good used simington grinder.
     
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  16. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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  17. Fisherpilot

    Fisherpilot ArboristSite Lurker

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    I’m in north central TX and have a ton of post oak that I’ll be cutting. A lot of fallen tops and some standing live trees that be thinning out. Hoping to get a good all around chain and have several on hand
     
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  18. vortec325

    vortec325 ArboristSite Operative

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    It was pretty rewarding when I finally got the hang of round filing but was also rather frustrating at first . I’m not sure I got the patience to go threw trying to learn a new sharpening process


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  19. LonestarStihl

    LonestarStihl Addicted to ArboristSite

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    I’m in southeast TX in the piney woods. Lots of pine, oak, elm... I’d go with round full chisel and enjoy. If it’s been down for a while you can go to seminchisel but I run full chisel for pretty much everything
     
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  20. vortec325

    vortec325 ArboristSite Operative

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    I’m not sure about oak in your kneck of the woods but up here in Maine the stihl RSK chain chews right threw it . It’s softer than some of the other hardwood


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