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My friend installed a Hyway popup piston in his 261C

Discussion in 'Chainsaws' started by GlocknStihl, Oct 29, 2018.

  1. drf256

    drf256 Dr. Richard Cranium (“RC” to Muh pals)

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    One other point.

    Meteors don’t have a lot of “rib” on the side either. Run them for a while and the valleys get some carbon while the peaks stay clean. The contrast that occurs makes it more apparent.

    Ever see a new oem piston look a bit rubbed after a build and then “clean up”? I certainly have. The valleys fill and the small rubs on the peaks lose their contrast. The small rubs become invisible, as they are solely on the peaks of the machine marks.

    There is a good chance that some machine marks become apparent on the Hyway slug after use.
     
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  2. CR888

    CR888 Pinnacle OPE Member

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    The bevel at the bottom of the piston is there to direct oil to the cylinder wall.
     
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  3. RI Chevy

    RI Chevy Stihl Runner

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    Just to add to thread. A Meteor piston for 261. 20181106_102321.jpg 20181106_102231.jpg 20181106_102333.jpg 20181106_102341.jpg 20181106_102353.jpg
     
  4. RI Chevy

    RI Chevy Stihl Runner

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    And the pin. 20181106_102407.jpg
     
  5. Stihlsmoking

    Stihlsmoking City Hillbilly

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    Here is new Oem 261. DEAFD35E-B4DC-4A9C-9669-2AA994AE2AB8.jpeg 17DA95B5-81B9-4D64-97D5-46E911EFA6E4.jpeg 18D7F614-24C3-428C-B65D-045EE79C1572.jpeg B0D4F3E2-3485-453E-9256-006BC7464563.jpeg EDC1EB0E-E3C6-4865-9689-920B1C296D5C.jpeg
     
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  6. RI Chevy

    RI Chevy Stihl Runner

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    New is nice!!!
     
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  7. Stihlsmoking

    Stihlsmoking City Hillbilly

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    Was looking at first pictures and seen a spot so went and looked again.
    What does everyone think of this tiny bad spot on OEM piston. 41A4D86C-694D-45A2-B36F-E8E3EE505CEA.jpeg
    D9D9B258-B17D-4EEF-AD4F-C8CE7C48EC17.jpeg
     
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  8. Finnrpm

    Finnrpm Well-Known OPE Member

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    Flaw on a OEM part, expensive or not, has always pissed me more than flaw on a AM part. That's what you pay for, flawless quality, right??
     
  9. smokey7

    smokey7 Pinnacle OPE Member

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    That tiney little casting imperfection is meaningless to me. I get why someone would expect perfection but i honestly dont think it would make any difference atall. If one was to look at every part under magnification of a oem saw im sure you would find several casting errors. Keep in mind guys its a saw not a spaceship lol. If we forced them to perfection that same saw would double in cost in a hurry.
     
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  10. blsnelling

    blsnelling Friend of the Riff Raff

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    That tiny pore is completely inconsequential.
     
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  11. Stihlsmoking

    Stihlsmoking City Hillbilly

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    Thanks guys I didn’t actually see it taking pictures but seen it posting the pictures. I didn’t figure it’d make any difference but wasn’t sure with heating and cooling of piston. Thanks
     
    Last edited: Nov 8, 2018
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  12. kfd518

    kfd518 Well-Known OPE Member

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    My stocker that was bought used is 160
     
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