What was found
DURING CRUISE FROM CHS TO LGA RT ENGINE VIBRATION ICON ILLUMINATED INDICATING VIBRATIONS >.2" UP TO 1.3" PER SECOND. FLIGHT CREW COMPLIED WITH QRH AND DIVERTED TO PHL. AN EMERGENCY WAS DECLARED WITH ATC AND A/C LANDED IN PHL WITHOUT FURTHER INCIDENT. MAINTENANCE PERSONNEL REMOVED AND REPLACED STARTER GENERATOR AND PERFORMED HIGH ENGINE RUNS, NO FURTHER DEFECTS NOTED AND ALL INDICATIONS WERE WITHIN LIMITS. AIRCRAFT WAS RELEASED FOR SERVICE.