Keep your boat running reliably with the Mercury/Quicksilver 862054Q V-Belt (also cataloged as 57-862054Q). Measuring exactly 39-1/2 inches in length, this genuine factory OEM replacement part is specifically engineered to fit select MerCruiser 3.0L Alpha One, TKS, and 3.0L MPI EC sterndrive engines.Built from premium-grade reinforced marine rubber, this heavy-duty accessory belt is precision-molded to withstand the grueling demands of high-RPM marine environments, offering superior resistance against heat, moisture, stretching, and glazing. By maintaining a constant, slip-free grip on your engine's pulleys, it ensures uninterrupted power transfer from the crankshaft to critical systems like your alternator and water pump, protecting your vessel from dangerous battery drops and engine overheating out on the water.