Stihl 200t

[paragonbuilder]

Doing a couple saws for a tree service guy. Got the 201t running good. Time to move on this 200t.
Tore it down. It's pretty dirty like the other one. I'm going to have to give him s lesson in maintenance...
Any way the piston is toast

Looks like the cylinder will clean up nicely though

This saw passed the leak down test. Fuel in it at the moment is mix gas.
Any ideas what may have caused this. By the looks of the piston top above and the plug

It wasn't running lean.



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[TJ the Chainsaw Mechanic]

I see alot of carbon. Looks like carbon scoring to me. Running to rich or to high a mix ratio maybe.

 

[paragonbuilder]

I see alot of carbon. Looks like carbon scoring to me. Running to rich or to high a mix ratio maybe.

Hmm. I hadn't thought of that. It's possible. Take a look at the air filter I pulled off his 201t.

This saw had a brand new one. Maybe he thought that would fix it???
I'm waiting for a response on the story behind it if there is one...


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[TJ the Chainsaw Mechanic]

Hmm. I hadn't thought of that. It's possible. Take a look at the air filter I pulled off his 201t.

This saw had a brand new one. Maybe he thought that would fix it???
I'm waiting for a response on the story behind it if there is one...


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That sure doesn't help the situation either. That would cause the saw to starve for air and fun hotter than normal. I'm surprised it ran! lol

 

[paragonbuilder]

Yeah I need to teach him how to sharpen a chain too. They were really bad. I'm sure that didn't help the heat situation either. I was thinking that was the culprit... Maybe a combination of things?


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[angelo c]

Dan, those little saws are sum tough somofabeaches....they all look like that when I see them....then ...they die...a painful, slow agonizing death...willimgly flogged to death by a feelingless operator who has never ever seen the working end of a maintenance tool before.

 

[SixGun]

Fuel line cracked ?

 

[bikemike]

Hmm. I hadn't thought of that. It's possible. Take a look at the air filter I pulled off his 201t.

This saw had a brand new one. Maybe he thought that would fix it???
I'm waiting for a response on the story behind it if there is one...


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That is a pre filter

 

[paragonbuilder]

Fuel line cracked ?

Maybe. I haven't looked yet. But I'm ordering all new rubbers for it.


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[paragonbuilder]

That is a pre filter

Lol!


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[paragonbuilder]

I'm waiting for a response on the story behind it if there is one...


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He said he bought it used and it never ran right so he put it aside. Oh well.


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[bikemike]

I'd say that's old stihl oil and too rich with fuel. I have ram a few saws at 32.1 all day long and haven't had that much carbon. I bet is was dumping fuel into it to cause most of that carbon and plugged exhaust. Air filter looked good like it was doing its job

 

[Al Smith]

That carbon is from unburned fuel not nessesarily from oil .If it were not for the "intellicarb device it probably wouldn't have ran it all .By the looks of that plugged air filter it was about like running with the choke on .
For those who don't know the intellicarb thing works to allow the saw to run at a reduced performance more or less alerting the operator to clean the air filter .If not the damned saw could choke out while the trimmer is in the top of a tree right in the middle of a cut .That would suck with a half life .

 

[Lone Wolf]

Doing a couple saws for a tree service guy. Got the 201t running good. Time to move on this 200t.
Tore it down. It's pretty dirty like the other one. I'm going to have to give him s lesson in maintenance...
Any way the piston is toast

Looks like the cylinder will clean up nicely though

This saw passed the leak down test. Fuel in it at the moment is mix gas.
Any ideas what may have caused this. By the looks of the piston top above and the plug

It wasn't running lean.



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Looks like heat, I bet the chain is dull and the fools were leaning real hard on the saw through bigger wood. Maybe cheap fuel added to the heat, does he run fresh Super or old reg crap?

 

[paragonbuilder]

Hey Steve. It's good to see you here!
He said he bought it used, and realized something was wrong with it right away and put it aside. But that chain was more than dull....probably would have cut better on backwards.


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[Lone Wolf]

Hey Steve. It's good to see you here!
He said he bought it used, and realized something was wrong with it right away and put it aside. But that chain was more than dull....probably would have cut better on backwards.

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Any damage to the piston guide pin and or piston where it goes due to no oil? Is there oil in the mix? Can you test the gas for high Ethanol content?

 

[paragonbuilder]

Any damage to the piston guide pin and or piston where it goes due to no oil? Is there oil in the mix? Can you test the gas for high Ethanol content?

No damage. Everything is coated in a good layer of oil. It definitely had mix but I don't have anything to test it with.


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[Lone Wolf]

No damage. Everything is coated in a good layer of oil. It definitely had mix but I don't have anything to test it with.


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Heat and or poor fuel!

 

[Lone Wolf]

Hey is anyone aware the screws on the Zama Carbs used on the Stihls MS 200t's are not Philips heads as you may think ? They are JIS screws and use a Japaneses screwdriver to work properly.

http://www.vesseltools.com/hand-too...se-industrial-standard/view-all-products.html

 

[paragonbuilder]

Hey is anyone aware the screws on the Zama Carbs used on the Stihls MS 200t's are not Philips heads as you may think ? They are JIS screws and use a Japaneses screwdriver to work properly.

http://www.vesseltools.com/hand-too...se-industrial-standard/view-all-products.html

Wow! That is some cool info right there Steve! I never knew that. I always felt like my screwdriver was shot or the wrong size on them. Now I know why!!!


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