Let the fun begin...

[Woodwackr]

I’ll say it again. Put it all in a box and send it back to me

goes out Monday

 

[Bill G]

Well, looks like Nate just plum wore this thing out
Current theory is clutch side bearing failure cascading to blow a seal and…won’t know what else till I get it all apart.
Compared pics from Kevin from the original build with what’s there now. Uh, a bunch of bearing *s-word isn’t kind to the inside of a nice cylinder. What’s there now ain’t what left Kevin’s shop . I think Nate got his money’s worth after 4yrs of hard, commercial use. Id also blame Husqvarna for a poor design but they probably didn’t factor this saw wearing a 32” bar for 4 yrs.

That is a hell of a lot of bar on medium saw.

 

[huskihl]

That is a hell of a lot of bar on medium saw.

It is, but they can be made to do it and still be reliable. @Cat 525 runs a half dozen of mine with a 28 dropping walnut every winter.

 

[Woodwackr]

So, since this thing has become a complete mystery and is way beyond my guessing "skills" I'm sending it to Kevin, who will figure it out. I'll let him continue this thread when he has more info, and time.
My initial guess as to bearing failure was wrong. With all the reports of crappy, even OE, bearings out there, I assumed...oops. bearings seem fine, crank spins freely with no indication of any bearing issues at all. I have not split the case since I don't have the needed tool for that. With the case stuffers I can't use my usual splitter.
What appeared as metal debris in the bottom of the case with a scope was just a reflection created by the scope cam's light. once I got the jug off to look...zip, nada. nothing metallic at all, case was clean.
There is clear detonation pitting on the ex side top of the piston so, a bad gas issue?

the mystery continues...stay tuned...

 

[Ketchup]

Kinda looks like dirt got in the muffler/exhaust.

 

[Woodwackr]

Kinda looks like dirt got in the muffler/exhaust.

A definite possibility. There is no shortage of dirt on this thing

 

[huskihl]

Little update on this thing. Chris did a great job packing everything up and bagging items separately that went together. Thank you for that.

No idea of the hours on it, but it’s got a couple

 

[huskihl]

Only damage I could find is chipped plating from the bottom of the exhaust. Chris found the piece of plating laying inside the upper transfers

 

[huskihl]

Cleaned up the cylinder and re-beveled the exhaust port

 

[huskihl]

Bearings were tight and well lubed. This is as I received it

 

[Woodwackr]

So, it will live to cut again! Awesome!

 

[Woodwackr]

Cleaned up the cylinder and re-beveled the exhaust port

View attachment 452021View attachment 452022View attachment 452023View attachment 452024

The master at work…

 

[huskihl]

So, it will live to cut again! Awesome!

It lives

 

[dangerousatom]

As caked on hardcore filthy as that case looks was the jug caked too? Id think it just ran hot, maybe a little lean on oil in the mix 1-2x and that may have pitted the piston Did the previous owner like to use race gas, that could have led to some piston degradation if the oil was not upped a littler too. Only other hypothesis is, was it use for short burst on a few super negative cold days and maybe the jug thermally expanded unevenly form hot on one side negative degree air on the other?....its a small engine I dont see temps playing much of an effect but

 

[Mastermind]

Only damage I could find is chipped plating from the bottom of the exhaust.

Cleaned up the cylinder and re-beveled the exhaust port

As caked on hardcore filthy as that case looks was the jug caked too? Id think it just ran hot, maybe a little lean on oil in the mix 1-2x and that may have pitted the piston Did the previous owner like to use race gas, that could have led to some piston degradation if the oil was not upped a littler too. Only other hypothesis is, was it use for short burst on a few super negative cold days and maybe the jug thermally expanded unevenly form hot on one side negative degree air on the other?....its a small engine I dont see temps playing much of an effect but

No mysteries here.

The 562 is a pain in the ass to get the bevels on the port edges to lay down and create a nice clean bevel on. A serious pain in the ass. I've done a great many of them. What was found: A small sliver of plating had flaked off below the exhaust port. That piece living in there scuffed up the piston a little. I say a little because this saw has been used.....and used hard. A little touch up to that port.....and it's good to go for a another hard round of tree killing.

There are only a few guys that I have the confidence in to send work too.....and Kevin is one of them. He doesn't need that these days of course....but there was a time a few years back when I sent a hell of a lot of people his way. And not one was disappointed by the level of quality of his work.

To lay this to rest: This saw.....a 59cc Husqvarna has been running a 32" bar for years. And at worst it might could use a new piston? That's fughin impressive.

 

[huskihl]

No mysteries here.

The 562 is a pain in the ass to get the bevels on the port edges to lay down and create a nice clean bevel on. A serious pain in the ass. I've done a great many of them. What was found: A small sliver of plating had flaked off below the exhaust port. That piece living in there scuffed up the piston a little. I say a little because this saw has been used.....and used hard. A little touch up to that port.....and it's good to go for a another hard round of tree killing.

There are only a few guys that I have the confidence in to send work too.....and Kevin is one of them. He doesn't need that these days of course....but there was a time a few years back when I sent a hell of a lot of people his way. And not one was disappointed by the level of quality of his work.

To lay this to rest: This saw.....a 59cc Husqvarna has been running a 32" bar for years. And at worst it might could use a new piston? That's fughin impressive.

Yeah probably could’ve used a piston. I ran some scotchbrite over the whole thing and slipped it into the bore. Under .003” clearance still using feeler gauges. Ring was at .015” end gap

 

[huskihl]

As caked on hardcore filthy as that case looks was the jug caked too? Id think it just ran hot, maybe a little lean on oil in the mix 1-2x and that may have pitted the piston Did the previous owner like to use race gas, that could have led to some piston degradation if the oil was not upped a littler too. Only other hypothesis is, was it use for short burst on a few super negative cold days and maybe the jug thermally expanded unevenly form hot on one side negative degree air on the other?....its a small engine I dont see temps playing much of an effect but

Cylinder was caked pretty good inside the fins. Might have led to it. Race gas probably would’ve caused it to run cooler. Octane resists pre-ignition. No benefit to it in a saw as these only run about 8:1 compression ratio. Oxygenated fuel would be a no-no without making certain the auto tune could deliver enough extra fuel for the added oxygen

 

[dangerousatom]

Rite-on.....was asking about race gas cuz ive ripped apart subaru motors that were run on it and some stock piston tops have been slightly eroded towards the exhaust valve in "V" patterns. Its odd, other tuner guys and I have theorized that its a reaction of heat/combustion with the race gas additives and the evap system burning off

 

[Mastermind]

Yeah probably could’ve used a piston. I ran some scotchbrite over the whole thing and slipped it into the bore. Under .003” clearance still using feeler gauges. Ring was at .015” end gap

Notice that I said "Might at most". You were the guy who needed to make that determination.

 

[jacob j.]

No mysteries here.

The 562 is a pain in the ass to get the bevels on the port edges to lay down and create a nice clean bevel on. A serious pain in the ass. I've done a great many of them. What was found: A small sliver of plating had flaked off below the exhaust port. That piece living in there scuffed up the piston a little. I say a little because this saw has been used.....and used hard. A little touch up to that port.....and it's good to go for a another hard round of tree killing.

There are only a few guys that I have the confidence in to send work too.....and Kevin is one of them. He doesn't need that these days of course....but there was a time a few years back when I sent a hell of a lot of people his way. And not one was disappointed by the level of quality of his work.

To lay this to rest: This saw.....a 59cc Husqvarna has been running a 32" bar for years. And at worst it might could use a new piston? That's fughin impressive.

Longest bar I ran on my 562s was a 28" and I was cutting primarily Lodgepole/Pondersoa Pine and Mountain Hemlock. They would strain at times with a 28" (semi-skip 33RSLK). Running a 32" daily on a 562 and making it work is impressive. It looks like to me someone more than got their money's worth out of that machine.