I posted a couple of weeks ago about a 562 XP. I had replaced fuel lines and, to do that, had removed and reinstalled carb. It started and ran fine, when warmed up it began to run lean and race. I shut it down. Ensured that I had put things back together correctly, started and ran fine, once warm began to race, so I shut it down. I took it to a local shop who told me that I had a torn boot which was causing it to run lean and that it was packed with dirt/crud. I was told that the cylinder or piston was toast They told me that it was cost prohibitive for them to fix (neighborhood of $300 for parts and another 2-300 for labor). So I should buy a new saw. I intend to fix it myself at this point. I am capable but do not have the knowledge or experience with chainsaws, so I posted on here for advice on what to do next. I was advised to get my saw back and take pictures of the piston and post here. The saw did come back in pieces (which at least tells me they tore it down to look). I have posted a picture off the torn boot (or what I assume he meant by boot). It appears to be torn on the exterior but each channel of it seems to be air tight. Either way, I am going to replace it, at roughly $15 it isn't worth not doing so. The piston appears to not have any major lines or craters from what I can see. The extreme right and left of the top third of it are dark in color as compared to the rest. There also appears to be a distinct color change about halfway down from a duller silver to a brighter silver. I have posted the pictures of what I could see through where the muffler was. Lastly, I posted a picture of the heat deflector...which appears to be damaged... Thoughts and advice? Next step - compression test?