The Husqvarna 550XP

[Sty57]

@Tor R
Can you install new seals without splitting the case? Or are they part of the bearing?

 

[redoakneck]

Will the 562 spikes fit?

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

 

[Termitebuffet]

Will the 562 spikes fit?

Yes wif a tiny bit of filing

 

[Tor R]

@Tor R
Can you install new seals without splitting the case? Or are they part of the bearing?

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

 

[A100HVA]

505 41 61-01

29.3X2.1X3.5

 

[Tor R]

505 41 61-01

29.3X2.1X3.5View attachment 69837

thanks William,

Latest 550 bearings:


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

 

[Sty57]

View attachment 68738 Well, what are the odds I've found the killer of this 550?

Just put together a 2253........I'm guessing this was the same thing that killed this one.

 

[Sty57]

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

 

[kingOFgEEEks]

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

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.

 

[Mastermind]

I don't advance timing on the 550.

 

[kingOFgEEEks]

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?

 

[Sty57]

This is how I did the muffler on mine. Its is much louder now......I might of went a little to far.

 

[Sty57]

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


Stock 550 cover for comparison

 

[David Young]

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?

 

[Sty57]

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?

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.

 

[Scott555]

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?

 

[huskyboy]

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?

It is worth reflashing the autotune to the newest update firmware

 

[Scott555]

It is worth reflashing the autotune to the newest update firmware

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 !

 

[huskyboy]

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 !

If your gonna throw it out send it my way

 

[CR888]

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 !

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...