Technical & maintenance
What are running hours?
Running hours are the operating hours recorded on machinery such as main engines, generators and watermakers, used to schedule maintenance that depends on use rather than time.
Many service intervals are set in running hours, for example an oil change every few hundred hours. The engineer reads the hour counters regularly, often daily, and the maintenance system works out which jobs fall due.
If readings are not updated, hour-based maintenance is missed or done too early, so logging running hours is one of the simplest habits that keeps a PMS accurate.
Related terms
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