OK I need your help, and by proxy so does the saw.
Background: ebay buy, got it running, idles, about 120lb compression, NO guts. I've got two 10-10 with more grunt and those are ~120 too. I assumed it was exhaust scoring based on what I saw looking down the intake. Took it apart to better evaluate, doesn't look nearly as bad as I expected...
piston/rings/cylinder:
Still not sure why it was so weak, unless it's that ugly mark on the exhaust side, but I've seen a lot worse do a lot better. I did check the compression release valve, it's working as expected. Exhaust is new, so no carbon blockage.
tag is: 600052D
Thanks all!!
Background: ebay buy, got it running, idles, about 120lb compression, NO guts. I've got two 10-10 with more grunt and those are ~120 too. I assumed it was exhaust scoring based on what I saw looking down the intake. Took it apart to better evaluate, doesn't look nearly as bad as I expected...
piston/rings/cylinder:
- Rings look OK but will replace anyway since I'm here
- Piston isn't terrible, one not-so-great spot on the top.
- Most markings on the cylinder don't feel bad, except for the obvious bad spot at the exhaust port, and even that doesn't feel that bad, except for right down the middle of it. I'm thinking some gunk got sucked in, scraped the top, and then scraped up the exhaust side on the way out.
- Bearings feel good, no slop
- Going to replace seals since I'm here
- Any "gotchas" on the seal replacement?
Still not sure why it was so weak, unless it's that ugly mark on the exhaust side, but I've seen a lot worse do a lot better. I did check the compression release valve, it's working as expected. Exhaust is new, so no carbon blockage.
tag is: 600052D
Thanks all!!