What was found
DURING ROUTINE ANNUAL INSP FOUND 1 EACH RHB32S CHAMPION SPARK PLUG TO BE MISSING HALF OF THE CERAMIC INSERT THAT SURROUNDS THE CENTER ELECTRODE. FURTHER CLEANING AND INVESTIGATION REVEALED 3 OTHER SPARK PLUGS WITH CRACKS IN THE CERAMIC. IT ALSO APPEARED THAT THE POOR CYLINDER DIFFERENTIAL COMPRESSION RESULTS ON THE CYLINDER THAT HAD THE SPARK PLUG MISSING HALF OF THE CERAMIC COULD HAVE BEEN THE RESULT OF THE LOOSE CERAMIC GETTING CAUGHT BETWEEN THE VALVE AND THE VALVE SEAT. WE HAVE SEEN A LARGE AMOUNT OF LIKE DEFECTS ON SAME TYPE OF SPARK PLUGS IN SAME TYPE OF ENGINE.