I've got an O-235-L2C(M) that has recently come back from inactivity. This chatter type wear pattern was present before running it for 25 hours and getting pretty high aluminum, chromium, and iron (and nickel) in the oil analysis. Compression was 73/80. I guess it's probably safe to say it's going to need a new cylinder, but I'm wondering if anyone has seen this before and what the cause could be? I am away from the logs at the moment but I believe it's a Superior cylinder with under 100 hours on it. Will be scoping it and checking compression again, but looking for experienced input in the mean time.
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