The bush K 43163 is a precision bearing and guiding component designed for the housing K 43161 of the starting device used on the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its primary function is to provide an accurately dimensioned bearing surface for the associated moving component, maintaining correct alignment while reducing friction and protecting the housing itself from direct mechanical wear. During repeated starting cycles, the bush can be subjected to sliding or rotational movement, cyclic loads, vibration, and localized contact pressures, making dimensional accuracy, suitable bearing properties, correct running clearance, and effective lubrication where applicable particularly important. As a replaceable wear component, the K 43163 also helps protect the more substantial K 43161 housing from premature deterioration and potentially more extensive repair requirements. During overhaul, the bush and its corresponding shaft or moving surface should be inspected for excessive clearance, scoring, wear, deformation, contamination, or other abnormalities. By providing accurate guidance and a controlled bearing interface within the starting-device housing, the K 43163 bush contributes to smooth mechanical movement, reduced friction and wear, correct component alignment, and dependable long-term operation of the ZV40/48 starting system.