Hey Jared, that's my old motor!
I set those valves myself (6 years ago) I didn't think to recheck them since I only put maybe 1/2hr on the engine. Were they tight or loose?
What was on the prechambers? Half burned fuel mixed with soot from me turning it over?
I really did clean it all with a toothbrush when it was apart. I"ll try and find the photos on my old hard drive.
My OM617 Build
Autozoo employees only care if you return a start with hammer marks. Their rebuilds are all kinda a gamble anyway. Any starter rebuild shops up there? The old timers will know what to swap in for more power.