How scored is too scored?

[Fat Tony]

I've had a Husqvarna 575xp for about ten years now, and it's been an excellent firewood saw. Got it super cheap off a fella who thought it was one with the bad crank seals. $5 fuel line and it ran great. For the last year or so tough, it hasn't idled worth a darn. WOT it would still rip, but no idle. Bought a carb for it on eBay, and took the cylinder and carb holder body all off in one go for ease of install, and was surprised to see the following, as evidence by the pics: Pretty bad scoring on exhaust side of piston and cylinder, as well as a large scratch on both. Is it remotely likely this thing will idle if I pop it back on with the new carb, or is it time for an aftermarket kit to salvage the thing?

 

[cuinrearview]

Horrible pic of the jug. The piston pic makes me think you'd have some work to do but my advice on saw cylinders with transfer is always the same. Clean it up and see what you have. Don't assume you can't save an OEM jug and buy a Meteor piston to resurrect it. Of course you'll also have to ascertain why it ran lean in the first place. Doing otherwise will assure another melt down.

 

[Fat Tony]

Horrible pic of the jug. The piston pic makes me think you'd have some work to do but my advice on saw cylinders with transfer is always the same. Clean it up and see what you have. Don't assume you can't save an OEM jug and buy a Meteor piston to resurrect it. Of course you'll also have to ascertain why it ran lean in the first place. Doing otherwise will assure another melt down.

Sorry, meant to throw that other pic in of the cylinder. Thanks for the reply.

 

[Mad Professor]

I've seen cylinders with way worse pistons clean up.

Can't tell from pictures what damage there is to jug.

 

[MACHINE]

Clean it

Sent from my SM-G955U using Tapatalk

 

[Fat Tony]

I'll try to get some better pics of the cylinder. What would you guys recommend it gets cleaned up with? Carb cleaner and rags, or does it need be something fairly abrasive?

 

[Ronie]

I'll try to get some better pics of the cylinder. What would you guys recommend it gets cleaned up with? Carb cleaner and rags, or does it need be something fairly abrasive?

Here's a good video on cleaning up a cylinder.

 

[John Lyngdal]

The deep grooves on the piston indicate a foreign object was the case.
That doesn't bode well for the jug bore.

 

[grizz55chev]

Sorry, meant to throw that other pic in of the cylinder. Thanks for the reply.

new Meteor piston, lightly sand the cylinder, pressure vac test, fix the original problem, get back to cutting for another 10 yrs.

 

[Mad Professor]

The deep grooves on the piston indicate a foreign object was the case.
That doesn't bode well for the jug bore.

I see scoring but not metal inside damage

 

[Fat Tony]

The jug itself has no appreciable groove/scratch that I can detect with a fingernail, for whatever that is worth. You can just see it in there.

 

[Fat Tony]

Also, it never occurred to me but were the ignition on these saws limited? It seemed to me when I tried to tune it earlier in the year it would only rev so high, and I think I may have boneheadedly turned it down to lean in an effort to get it to idle/pick up better.

 

[grizz55chev]

Also, it never occurred to me but were the ignition on these saws limited? It seemed to me when I tried to tune it earlier in the year it would only rev so high, and I think I may have boneheadedly turned it down to lean in an effort to get it to idle/pick up better.

black coil is not limited, blue one is.

 

[rupedoggy]

For the last year or so tough, it hasn't idled worth a darn. WOT it would still rip, but no idle.

Is it remotely likely this thing will idle if I pop it back on with the new carb,

No you will have to fix it. Very few saws will fix themselves.

 

[OM617YOTA]

Can I get a list of the saws which will? Seems like that info could come in handy.