Gas boat motors can last anywhere from 1,500 to 3,000 hours of operation, depending on several factors like maintenance, usage, and the quality of the engine. Regular upkeep, such as oil changes, fuel system cleaning, and proper winterization, can significantly extend the life of your motor. If you're using your boat for recreational purposes, you might get closer to that upper limit, especially if you're diligent about maintenance. For commercial or more intensive use, expect to be on the lower end of that range, but remember that a well-cared-for engine can often surprise you with its longevity.