Would you re-use this cylinder?

[Marty Lawrence]

Although I can see scratches above the intake & exhaust ports, I cannot feel with finger or nail, However I can feel below the ports. And there is some chipping below the intake

Would you re-use?

 

[209CrownKing]

Although I can see scratches above the intake & exhaust ports, I cannot feel with finger or nail, However I can feel below the ports. And there is some chipping below the intake

Would you re-use?

Is this a joke? If not I wouldn't personally. From the pics it looks like your cylinder is scored. If you can feel grooves in the cylinder that are indented then it's junk. Alot of time the cylinders will get what's called transfer. You can sand transfer out with aluminum oxide sandpaper or use muriatic acid (I don't recommend acid). Really only works on nikasil , chrome cylinders like what's found on most echos are too soft and the chrome will come off with the transfer. Hope this helps, good luck!

 

[NSEric]

There's too much damage under the intake port to make that cylinder savable, it's toast.
The transfer above the exhaust port would likely come off with some sand paper honing tho.

 

[pioneerguy600]

In the right hands that cylinder could be reworked to run and last a good long time but for the uninitiated /inexperienced cylinder porter it likely would not get the attention needed and then eat up a new piston.

 

[buzz sawyer]

Depends on how you want to run it. If only occasionally for light work, I'd clean it up. If you're planning to cut a lot of wood or doing this for a client, I would replace it. I've cleaned up much worse for a friend who only light cutting and couldn't afford a new P&C.
Whichever way you go, make sure there are no air leaks and the carb is set correctly, even a little rich. Probably use 32:1 fuel mix.

 

[ChillyB]

It would cost you only a piston and ring to find out. But as stated above if doing this for a living, and if this is a saw for which you don't have a backup, it could cost a lot more in time and reputation

 

[lone wolf]

Although I can see scratches above the intake & exhaust ports, I cannot feel with finger or nail, However I can feel below the ports. And there is some chipping below the intake

Would you re-use?

I wouldn't that looks like too much damage

 

[MacAttack]

Me personally, if that was my saw, I'd look for a new cylinder.

Good luck!

 

[209CrownKing]

In the right hands that cylinder could be reworked to run and last a good long time but for the uninitiated /inexperienced cylinder porter it likely would not get the attention needed and then eat up a new piston.

How? The damage goes far below the intake port and there's a pretty deep groove in the middle of the exhaust it looks like as well. No matter how good you are at porting you can't make the plating magically reappear. Once the nikasil is damaged then the saw will never run optimally.

 

[Marty Lawrence]

Is this a joke? If not I wouldn't personally. From the pics it looks like your cylinder is scored. If you can feel grooves in the cylinder that are indented then it's junk. Alot of time the cylinders will get what's called transfer. You can sand transfer out with aluminum oxide sandpaper or use muriatic acid (I don't recommend acid). Really only works on nikasil , chrome cylinders like what's found on most echos are too soft and the chrome will come off with the transfer. Hope this helps, good luck!

No Joke. I'm just trying to learn more. I personally thought it was no good. But then after hunting around this site I came across some threads that said some cylinders are re-usable even with some damage, hence my question. Everyones replys confirmed my suspicion. Thanks

 

[pioneerguy600]

How? The damage goes far below the intake port and there's a pretty deep groove in the middle of the exhaust it looks like as well. No matter how good you are at porting you can't make the plating magically reappear. Once the nikasil is damaged then the saw will never run optimally.

I can make it run,never said optimally.,Most saws are just used for utilitarian purposes not racing, I have kept dozens if not more old saws running for just firewood duty, many make it for several years of duty. If you want new then buy new but cleaning up old saws and keeping them producing a bit of wood cutting is something I have done most of my life,not my first rodeo.

 

[stihltech]

The answer is no.

 

[ZeroJunk]

No, until you do some work on it. I suspect it would clean up just fine.
Not wanting to hear a bunch of **** about my process for doing it, but every saw I run was that bad or worse.
There are you tube videos.
I would much rather have a reworked OEM cylinder than an aftermarket.
Meteor pistons are fine.

You HAVE to get ALL the aluminum transfer out or it will seize your rings like, right now.
Damage below the port does not amount to much as long as it is slick enough not to catch a ring.

 

[Gord404]

sometimes if it take a hit from a piece of --piston chunk or ring it will bulge thethe casting and will leave scars on your piston no matter what you do- had a 390xp last night tha had to be tossed out after cleaning and couldnt raize the exhust any more because it would effect my timing too much

 

[Mad Professor]

Cylinder that this was in cleaned up

 

[ZeroJunk]

sometimes if it take a hit from a piece of --piston chunk or ring it will bulge thethe casting and will leave scars on your piston no matter what you do- had a 390xp last night tha had to be tossed out after cleaning and couldnt raize the exhust any more because it would effect my timing too much

Yeah, you can't get them all. Did two MS661 cylinders last week . One good, the other not so much.