How often should the oil be changed on a boat's engine?

The oil in a boat's engine should typically be changed every 50 to 100 hours of operation, or at least once a year, depending on usage and manufacturer recommendations. If the boat is used in harsh conditions or for high-performance activities, more frequent changes may be necessary. It's essential to check the owner's manual for specific guidelines related to the engine model. Regular oil changes help ensure optimal engine performance and longevity.