Thanks to new technology, which allow increasing engine motor resource, high-speed diesel engines are becoming more popular in the marine industry. This is due to their small size and relatively high power capacity. These machines mostly are used as the vessels auxiliary engines and as emergency energy supplier. Last decade we can see a trend of high-speed diesel use as main engines, particularly foe vessels with diesel – electric power propulsion. Last accidents revealed that number of the engines damages appear without any symptom. Available information show that significant number of accidents is caused by malfunction and defects in cylinder pack (liner, piston, cylinder head). To prevent drastic consequences, detection of abnormalities in the early stage is extremely important [3-5]. Our research during four years was focused on AE method implementation for the engine condition monitoring.