The Husqvarna 550XP

Thanks for the thread Randy
Later, I'll post up all the information I can get out of my JRed/Husky dealers

 

Im here

 

subbed

 

Lets start slow I dont know if they updated the software or changed H-L valve, but I've crossed those parts who is new on AT 12 vs AT 7A



New trottle valve
New oval plug
New level
New gasket kit

 

Hello everyone. I have a question for the 550xps little brother 545.. Does anyone know what the needle height should be set too on the carb? Walbro AT-1 here specifically, but I assume it would be the same for the 550xp carb?

 

Here's a little reading for you, some you may find helpful, some not.
Brett

 

Sorry chipper, was there a link somewhere? I don't see it.

 

I just read through Workshop manual, I belive the needle height is flush with the carb body.
You can download manuals here:
http://opeforum.com/threads/husqvarna-workshop-manuals.997/

 

Thanks @Tor R ! I did not know that thread existed It looks like my needle is low from the factory.. unless someone has been in it before. Based on the stiffness of the diaphragm and the condition of the pump side, I think it's original.

BTW, I hope your feeling stronger every day!

 

I have a few AT-1 carbs, one of them come from an 545 year 2013, I'll try to rememeber to find it tomorrow and check where the needle is set
Has not been the best week for me, my body doesnt like one of the medecine they put me on

 

Sorry to hear that.

 

http://opeforum.com/threads/husqvarna-550xp-carb-fix.1524/

 

Hi @Tor R Hope you are feeling better! Have you had a chance to check one of the other AT-1s for needle height?

 

sorry, I had forgot it
Went and found one AT-1 and AT-7 carb (550 year 12 and 14), both of them look to have the same needle height, and none of them has height flush with the body.
My eyes tell me that they are at least 0.5mm lower, maybe even a whole 1mm

 

What bearings are used in the 550?
Are they proprietary ones or just standard bearings with seals?

 

proprietary bearings.

The last updated bearing # number is:
505 13 35 03
525 43 42 03

Flywheel seal is:
525 39 12 01

 

@Tor R
Looks like I'm going to be working on my first 550 at some point.
Dad brought his over yesterday and said he can't get the muffler to stay tight. So I put it up on the bench and looked at it.
Looks like he kept hitting the muffler as he used it. It finely cracked the lower ears on the muffler then loosened up at the cylinder and striped the holes out.

I'm guessing he will just end up getting a new one as this one has a ton of hours on it.

So my question is.... What are the must have updates for these saws if I end up rebuilding it down the road?
It's a 2013

 

Before or later we will all end up to work with one of those 5xx saws Brian.
He isnt the first one to knock off the muffler
To bad you dont live in Norway Brian, next time I ship over to US I gone trow in some 550 parts for your dad.

Preasure test is must do on them since AT hide small leaks, I had a 550 with blown PTO bearing amd the top end had survived!
The only update I would do is AT firmware upgrade, I read on a sweedish forum that Husky just updated their program.