Mercury - V-Belt 39-1/2" MerCruiser 3.0L Alpha One & MPI EC Reinforced Marine Rubber 862054Q. OverviewEvery boater knows that sometimes it's the simplest parts that carry the most responsibility. A good belt doesn't demand your attention-it quietly does its job while you trim up, throttle forward, and enjoy the day on the water. With the Mercury Marine part number 862054Q V-Belt, you get that steady reassurance that your 3.0L MerCruiser is breathing, cooling, and charging the way it should. It's