Nice score on the chainsaw. That thing has a wicked score mark on the piston but you said the walls were good? That's odd. What size echo is it? I've determined my $30 husqy needs a little more work. I replaced the coil with a new one, still no spark. Messaged the seller that it had no spark and they emailed back in broken English asking if I didn't get the spark plug. Emailed again saying the coil was bad and they finally sent another coil. Second coil was good but still wouldn't fire. Compression test showed 85psi MAX but I couldn't keep the de-comp valve shut but still.... Haven't messed with it since the comp test. I will have to pull the muffler and get a peak inside. I assume it will need a new jug and ring, maybe a piston but these parts are oddly really cheap online. whenever I get my tax money I will sink some new parts in it and hopefully have a good backup saw. More like a second saw since I never have issues with my stihl chainsaw. I think I have a chainsaw for every day of the week and then some.