What was found
DURING A ROUTINE 50 OIL CHANGE/COMPRESSION CHECK, THE NR 3 CYLINDER WAS FOUND TO HAVE LEAKAGE PAST THE EXHAUST AND PISTON RINGS. THE REMOVED CYLINDER WAS FOUND TO HAVE A WORN OUT EXHAUST VALVE, EXHAUST VALVE GUIDE, AND CYLINDER BARREL (NO CHOKE). THE CYLINDER ASSEMBLY WAS REPLACED WITH A NEW UNIT. SUBMITTER SUGGESTED POSSIBLE CAUSE AS DEFECTIVE PARTS OR ASSEMBLY PROCESS FROM THE FACTORY.