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Stihl 261 muffler mod question

Discussion in 'Modded Hot Saws' started by Highdesignfool, Jan 1, 2018.

  1. Highdesignfool

    Highdesignfool Well-Known OPE Member

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    So I'm finally getting around to doing the muffler mod on my NON mtronic 261. I cut the gills in the left side of the muffler, took out the screen also. Is there any more that should be done?
    What's the consensus?[​IMG][​IMG]
     
  2. Redfin

    Redfin Meh...

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    Open up under the screen holder.
     
  3. Highdesignfool

    Highdesignfool Well-Known OPE Member

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    Within the deflector or below? How much?
     
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  4. Redfin

    Redfin Meh...

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    As much as you can under the deflector.
     
  5. Redfin

    Redfin Meh...

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    Get rid of those limiters. 261 likes abit more fuel to run at its peak.
     
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  6. Highdesignfool

    Highdesignfool Well-Known OPE Member

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    Thumbs down
     
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  7. Highdesignfool

    Highdesignfool Well-Known OPE Member

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    I drilled out the pin that limits the travel on the H screw. That went great, just need to buy a tach
     
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  8. Chainsaw Jim

    Chainsaw Jim Cylinder Assembly

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    Under the deflector, not below. Some might even say "within the deflector".
     
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  9. Highdesignfool

    Highdesignfool Well-Known OPE Member

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    [​IMG]
    Does that look like enough?
     
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  10. Chainsaw Jim

    Chainsaw Jim Cylinder Assembly

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    Not if the channel feeding the screen wasn't cut open, removed or partially removed. A ball burr is about the best tool to use for this. You grind a hole through the channel where I have it marked. I don't like to grind it open too far forward because the deflector won't be able to direct the flow. 20180101_153658.jpg
     
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  11. Highdesignfool

    Highdesignfool Well-Known OPE Member

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    Are you saying the channel that the screen sits in needs to be removed?
     
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  12. Redfin

    Redfin Meh...

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    This is the way I have done a few 261s. I prefer to keep a screen in all my builds but it is replaced with one more open. IMG_3536.JPG IMG_3537.JPG IMG_3538.JPG IMG_3539.JPG
     
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  13. Redfin

    Redfin Meh...

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    Starter side outlet will get nutserts with 8/32 and a screen.
     
    Last edited: Jan 6, 2018
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  14. Redfin

    Redfin Meh...

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