Bought this very nice Jonsered a few months ago. It had a lot of compression and ran very strong. I found out after I bought it that it had a big bore kit. I'd rather have OEM, but whatever, it ran good and I was happy with it. I've only ran it a few times.
So, I took it out the other day and fired it up, made a couple cuts, and it died. Yesterday, I put the compression tester on it, 135 psi.
I knew something was up, because the rope was much easier to pull than before, but my research said 135-140 was okay on a 372/2171.
Well, I decided to pull the jug and the first thing I find is the damn cylinder bolts are loose. I mean way loose! Like falling out, all 4 of them.
This is what I found...
I guess from now on I'll be checking the cylinder bolts whenever I get a new saw!