Chainsaw repair - damaged cylinder

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scrap48

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My Dad had this Stihl 034 laying around collecting dust because someone told him a few years ago it was not worth fixing. I figured I had nothing to lose and would at least I would have a look.

Here is what I found so far. I took apart the cylinder and image 1 shows some scoring at the top of the cylinder near the spark plug.

Image 2 shows some scoring up the cylinder wall near exhaust. The piston looks to be in Ok shape although I will probably replace it.

Any suggestions on how to repair the cylinder or if it is worth it to even attempt?

Would a lean gas/oil mixture cause this?

Can anyone recommend a good site to purchase a cylinder kit from?
 
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