As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A ROUTINE 100-HOUR COMPRESSION TEST, EXCESSIVE LEAKAGE WAS NOTED GOING PAST THE EXHAUST VALVE. THE EXHAUST VALVE, EXHAUST VALVE GUIDE FOUND TO BE WORN OUT. THERE WAS NO CHOKE LEFT IN THE CYLINDER BORE. THIS IS A FACTORY RE-MANUFACTURED ENGINE.