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ID cylinder.

Discussion in 'Chainsaw' started by alleyyooper, Apr 7, 2019.

  1. alleyyooper

    alleyyooper Addicted to ArboristSite

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    A picture of a cylinder for a Husky 55 EPA.

    [​IMG]


    At the base it is marked Marle 44zn15. Does the 44 mean it is 44 MM?

    :D Al
     
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  2. alleyyooper

    alleyyooper Addicted to ArboristSite

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    More pictures.
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]

    :D Al
     
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  3. cus_deluxe

    cus_deluxe Thats what she said.

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    most times it gives you an idea, but not always the same. that one should be 45mm, its the pretty uncommon closed port 55 cylinder. make for really good runners ive heard.
     
  4. grizz55chev

    grizz55chev Tree Freak

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    If you have a piston to go with it.:)
     
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  5. cus_deluxe

    cus_deluxe Thats what she said.

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    when i built my white top 50 with partner 5000 top end, i used the original 44mm piston and just drilled a hole on either side of wrist pin boss on both sides of piston. id be tempted to do that with a 350 piston or something if i had one of these, rather than go lil red barn.
     
  6. Huskvarna hotellgäst

    Huskvarna hotellgäst ArboristSite Member

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    You too?
    I also once dabbled in 50s with P5000+ cylinders. I kept one but it was stolen after only a few hours of use.
    Happily, in those "ancient" times, I had the luxury of new cylinders and pistons, so no drilling required.
    I used a 444 carb, air filter & filter holder, and a blue choke lever off a clearing saw, I think.
    only real problem was that the inertia brake would self activate at about 13,500rpm due to the brake activating spring resonating at the frequency equated with that speed. Solved it by building the old-style pushrod inertia brake mechanism into the new-style cover & handle.
     
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  7. cus_deluxe

    cus_deluxe Thats what she said.

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    no issues with chain break on this one haha. 372 carb and boot
    C2796D6F-B19A-4DE3-8FA5-1F5C8DA4B879.jpeg
     
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  8. Huskvarna hotellgäst

    Huskvarna hotellgäst ArboristSite Member

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    Err...no :innocent:
     
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  9. alexcagle

    alexcagle Cutoff Saw Specialist

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    44mm is the Husqvarna "50", isn't it? 50cc version.
     
  10. huskihl

    huskihl Addicted to ArboristSite

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    I agree the 55 should have some z's, k's, or n's along with a 45 for a closed port or a 46 for open port.

    A 51 should be a 45mm open port
     
  11. Huskvarna hotellgäst

    Huskvarna hotellgäst ArboristSite Member

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    Model 50: 44x32 (49cc)
    Model 51: 45x32 (51cc)
    Model 55: 46x32 (53cc)

    If that Mahle cylinder is 44mm and I'd only seen a picture without the muffler attached, I would have guessed it to be from a Partner 5000+.
     
  12. alleyyooper

    alleyyooper Addicted to ArboristSite

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    Thanks for the replys, I'm still lost however?!>. is it a 44mm or doesn't the marks mean any thing.
    Would a husky OEM 44mm piston be impossiable to find?


    :D Al
     
  13. cus_deluxe

    cus_deluxe Thats what she said.

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    you could just measure it and see what diameter it is, and save us all the wondering haha.
     
  14. cus_deluxe

    cus_deluxe Thats what she said.

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    that could be from a partner, but its not the right muffler and i dont they came with decomps ever. also dont believe the 50 “special” cylinders had decomps either, which is what made me think is was the closed port 55
     
  15. cus_deluxe

    cus_deluxe Thats what she said.

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    this is for a 281, 52mm,but the base says 54, only to show that the number on the base is not ALWAYS the exact bore.
    E2435C92-6EF2-45EE-B6AC-E16BCF8716C4.jpeg
     
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  16. alleyyooper

    alleyyooper Addicted to ArboristSite

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    I was told the cylinder is off a 55EPA sold about 97 or 98.

    Will need to look up a metric to Sae measurement then get back to you.


    :D Al
     
  17. cus_deluxe

    cus_deluxe Thats what she said.

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    if thats true then its 45mm, closed port 55
     
  18. Huskvarna hotellgäst

    Huskvarna hotellgäst ArboristSite Member

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    Ah! Lack of millimetre rule. I was puzzled as to why you just hadn't just measured it.:D

    44mm = 1.732283464566929 inches
    45mm = 1.771653543307087
    46mm = 1.811023622047244
     
  19. Huskvarna hotellgäst

    Huskvarna hotellgäst ArboristSite Member

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    Asked as respectively as possible, have you measured the bore? :eek:
    It's just that I have a sneaking suspicion that your 281 cylinder might in fact be a 54mm 288 cylinder.
     
  20. Huskvarna hotellgäst

    Huskvarna hotellgäst ArboristSite Member

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    Then open port 55s are 53cc and closed port 55s are 51cc.
    Were the latter a US only version?
     
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