Can anyone help me narrow down what the issue is please

[patto5687]

Hay guys/girls I am hoping someone on here can help me with a issue I am having ok so I own a autotune husqvarna 560xp 2013 model has been an amazing saw but it has now started being hard to start will not idle and once It's warmed up and I do a cut it stays up and peek revs I have stripped it down cleaned everything up and it's still doing it any help or advice will be really appreciated thanks in advance everyone 

[spudulike]

Not sure what "warmed up and I do a cut it stays up and peek revs" means but it sounds like the saw, when warm, isn't snapping back down to idle revs when the throttle is released??? If this is the case, it is quite possible that the saw has a big air leak.

 

If the saw is just lacking, not starting well, especially when hot, it is probably wear in the piston or rings.

 

If you get the machine on the Husqvarna CST system, the carb setting details will show up being very rich if you have a bad air leak.

 

It is strange as I have seen 540XPTs run pretty well even with the impulse line off so a relatively big air leak and the idle was just dying - one of the positives of autotune.

 

Being an older 560, it is possible the cylinder gasket may have failed around the transfer ports on the front of the cylinder.

 

[adw]

As Spud said air leak, it’s quite an old saw so I would say drive side crank seal, it may well have failed because the bearing cage has broken up, if still fitted take a look at the spark arrester, if there are signs of melted plastic the cage has broken up.

[patto5687]

Ok thanks guys ill have a look at the couple this you guys mentioned and I'll try and upload a video of the issue so you can see exactly what the issue is thanks again 

[Muddy42]

Yup sounds like an air leak - pressure test it.