I'm going to do some checking over on it tomorrow. I only had enough time to pull the cylinder off of it. I'm sure its ate it's fair share of saw dust and hard telling how many hours is on it. Really makes a person wander how these saws hold up like they do. 10,000 to 13,000 rpm when they are running not to mention the heat and dirt they are in.
The cylinder actually looks good considering the front of the piston.
That's possible. I just got the new top end put together and ran it. It doesn't show any signs of running lean. Has a nice 4-stroke wide open
I'm not sure what else would cause the ringland or ring, to come apart like that. Could have been running it hard in the winter, got the saw hot, and then caused detonation at high RPM. Generally winter calls for a more rich mixture with the increase in air density.
No doubt the saw gets run hard all year long. I know he is good about adjusting and tuning his saws. He has been cutting for 30+ years. That does make since having to richen it up in the winter.
I used OEM husqvarna. It's not a whole lot more than a good aftermarket set. Husqvarna uses Mahle piston and cylinders. At least on the 372xp anyways. This is actually a redmax gz7100. The 372xp, cs2172 and gz7100 made by husqvarna. Only thing different is color, plastic, and handle bars.
I was always a stihl guy myself. My father in law uses dolmar and jonsered. That's how I got acquainted with them. He's had several 2166's as well. Same saw just a little less power. I like the anti vibe on the jonsered better than the stihl. I also like the jonsered straight handle bar vs the husqvarna angled. That's the only thing I dont like about my 550xp.
Thanks for the info. I am still learning on these things. Spacebus said the same thing.
My buddy and I both bought new 2172 when the local hardware store decided to close out Jonsered. Mines still great but my buddy managed to burn his up, scored piston on the exhaust side. Same store we bought from said it wasn't worth fixing so he sold it to me for parts. I told him he could fix it himself but he's not inclined to do such things. Cleaned up the cylinder (this one was worse than yours) and installed a new meteor piston. Also installed new crank seals since that's probably what caused the lean scoring on the piston. Got a 2nd good running 2172 now and learned a little about the internals of these saws.
Are you sure about that? I run full chisel on my Husqvarna 460 and my 395xp came with full chisel. Most folks running 372's and getting paid for it are running full chisel as well.
