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The Husqvarna 550XP

Discussion in 'Husqvarna AutoTune Saws' started by Mastermind, Jan 17, 2017.

  1. Sty57

    Sty57 Mastermind Approved!

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    @Tor R
    Can you install new seals without splitting the case? Or are they part of the bearing? [​IMG]
     
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  2. redoakneck

    redoakneck Pinnacle OPE Member

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    I forget what I put on mine, just remembered the stock one was too puny
     
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  3. Termitebuffet

    Termitebuffet Home of the corn can muffler .....

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    Yes wif a tiny bit of filing
     
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  4. Tor R

    Tor R Newbie GoldMember

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    Yup, you sure can Brian.
    The first years of 550 they used same bearing as 346 had, later v2 came and then v3, but I belive the seals are the same
     
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  5. A100HVA

    A100HVA Well-Known OPE Member

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    505 41 61-01

    29.3X2.1X3.5 550 CS SEAL.JPG
     
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  6. Tor R

    Tor R Newbie GoldMember

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    thanks William,

    Latest 550 bearings:
    _DSC3907.jpg

    PTO: 525 43 42 03
    FS: 505 13 35 03
    FS seal: 525 39 12 01 (no update there)
     
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  7. Sty57

    Sty57 Mastermind Approved!

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    Just put together a 2253........I'm guessing this was the same thing that killed this one.
    20170704_083220.jpg
     
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  8. Sty57

    Sty57 Mastermind Approved!

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    Any of you guys doing a timing advance on the 550 / 2253?
     
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  9. kingOFgEEEks

    kingOFgEEEks Pinnacle OPE Member

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    I did a hack-saw muff mod on my 550 (Cut 3 slots on the PTO side, then used a screwdriver to make them into 'gills'). I've been test running it to see if there are any issues. I plan on pulling the muffler soon and seeing how things look, but it woke the saw up for sure.

    Not sure about timing advance. I haven't messed with that yet.
     
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  10. Mastermind

    Mastermind Head Slacker Staff Member GoldMember

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    I don't advance timing on the 550.
     
  11. kingOFgEEEks

    kingOFgEEEks Pinnacle OPE Member

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    One other thing I noticed on that 550 - I used a golf piston, as it's really just a toy / test mule for me right now, so no need to spend $$ on OEM.

    Anyway, the little cutout in the intake side of the piston skirt just clears the intake port at TDC. The OEM piston that was scored in it did not do that - it left a little bit of piston skirt showing at TDC.

    Since I didn't run the saw without muff mod, or next to the other 550 I built with an OEM piston, I can't comment for sure. Is it possible the little bit earlier opening of the intake be part of what woke this one up?
     
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  12. Sty57

    Sty57 Mastermind Approved!

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    This is how I did the muffler on mine. Its is much louder now......I might of went a little to far.
    20170707_113454.jpg 20170707_120407.jpg 20170707_120430.jpg 20170707_180956.jpg
     
  13. Sty57

    Sty57 Mastermind Approved!

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    I did mod the top cover too, it seems to let a lot more air come through from the fan now.
    20170709_123508.jpg

    Stock 550 cover for comparison

    20170709_123607.jpg
     
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  14. David Young

    David Young Safety First !!!!!! Staff Member

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    I have a 550 that will not idle at all. what is the first thing to check?



    also
    the springs are out of the clutch, it is the 2 C spring style. how do I get them back in?
     
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  15. Sty57

    Sty57 Mastermind Approved!

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    David did you check all the normal stuff on it...... Plug, Air / Fuel filter, Spark screen?

    My dads 550 had the ring stuck in the land and was down on compression.
    The J-Red that I just did must of had an air leak from day one. I'm guessing it was over fueling trying to keep it's self alive. When I pulled the screen out of the muffler, it was almost completely plugged shut.
     

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  16. Scott555

    Scott555 OPE Member

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    brand new here, hi all.

    I bought a brand new 550xp in late 2017 - just realized by its serial number that it was made in 2013.
    It's a triobrake model, so maybe it was hard to move, or what not. Regardless, with only about ten hours or so on it, it's now in shop because it's lost nearly all compression and won't start.

    My question here is - should I be concerned about having gotten such an old saw? I'm trying to see what improvements I may have missed out on. I've come across a few, a venting improvement on fuel tank - anything really meaningful?
     
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  17. huskyboy

    huskyboy Sorta a husqvarna guy...

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    It is worth reflashing the autotune to the newest update firmware
     
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  18. Scott555

    Scott555 OPE Member

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    I've since learned that newer 550XP saws have revised crank, bearings, piston, cylinder, oil pump, and 4 different revisions to the carb. Will definitely be pushing for a new saw !
     
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  19. huskyboy

    huskyboy Sorta a husqvarna guy...

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    If your gonna throw it out send it my way
     
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  20. CR888

    CR888 Here For The Long Haul!

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    Lesson learned. Next time asking for a serial no and date of manufacture are wise questions. Some saws brands/models it don't matter so much but 5 series Hooskies...
     
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