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041 FB piston question

Discussion in 'Chainsaw' started by Bowtie, Mar 7, 2009.

  1. Bowtie

    Bowtie Gearhead

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    The 041 FB I got today is of course 44mm and has a single piston ring. I am looking at pistons and some 44mm pistons I am finding have 2 rings. Whats the deal? Are they interchangeable? Do I have to find a single ring piston to replace it with?
     
    Last edited: Mar 7, 2009
  2. super3

    super3 Addicted to ArboristSite

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    I don't know if there are any gains to be had with the single ring or not but I have a nos oem that's 2 ring. Same part number in ipl for all models.
     
  3. Bowtie

    Bowtie Gearhead

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    So has anyone used a 2 ring piston kit in the same cylinder a 1 ring piston was used in? Just want to make sure I am getting the right piston.
     
  4. Rockfarmer

    Rockfarmer ArboristSite Operative

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    I'm just guessing here but I'd say 2 rings are better than one. I think most newer designs use 2 ring. More sealing area, better support for piston, less scuff :cheers:
     
  5. Bowtie

    Bowtie Gearhead

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    I understand the merits of a 2 ring setup, I just need to make sure the dimensions and locations of the wrist pin bore, and that the 2 ring setup will work. Im no expert on these old saws, and I have searched this site a bunch trying to find info about this.
     
  6. Rockfarmer

    Rockfarmer ArboristSite Operative

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    I hear ya! It would be nice if they would lay out the drawings for the piston, pin height, pin diam, length ect meteor lays each piston out but it doesnt help with the specs from the stihl side. They're so secretive :cry:
     
  7. Bowtie

    Bowtie Gearhead

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    Right!
     
  8. super3

    super3 Addicted to ArboristSite

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    041

    Here an oem
    [​IMG]
     
  9. Bowtie

    Bowtie Gearhead

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    Hell Yeah! Thats what I was looking for! (Maybe I shoulda asked) Now as long as the ring config will work in my cylinder, Im set. It about has to when the cylinder should be the same for all 44mm versions.

    Does anyone have an IPL for the 041?
     
  10. super3

    super3 Addicted to ArboristSite

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    I have a hard copy and one that Haywire sent me in here somewhere.I'll see if I can find it. Then....it's a matter of gettin my dumbass to figure out how to send it.
     
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  11. Bowtie

    Bowtie Gearhead

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    Thats ok, I have one at work. What do you get for overall length from bottom of skirt to bottom of piston dome? Mine shows 1.923"
     
  12. super3

    super3 Addicted to ArboristSite

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    Yep same,found the ipl,pm me your email and ill send it.
     
  13. Bowtie

    Bowtie Gearhead

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    pm sent. Last question, what is your wrist pin diameter Mine is .391" or 9.95mm. Thanks again!
     
  14. Bowtie

    Bowtie Gearhead

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  15. super3

    super3 Addicted to ArboristSite

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    I get 3.93" and 9.99mm. but thats with real light presure. If I use a little more thumb yours are spot on.
     
  16. super3

    super3 Addicted to ArboristSite

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  17. sawinredneck

    sawinredneck Addicted to ArboristSite

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    Frickin kids:monkey:
     
  18. Bowtie

    Bowtie Gearhead

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    Mine is a B, and the one I got off ebay is supposed to be a B as well.
     
  19. Bowtie

    Bowtie Gearhead

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    Who you callin kid? :givebeer: :cheers:
     
  20. super3

    super3 Addicted to ArboristSite

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    Some of us are dumbass kids too:dizzy:
     

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