This alternator is specifically designed for use with Cummins for Mercruiser engines, providing a dependable power source for your marine applications. With a 6 groove design and a 65A output, it is ideal for models such as the 377 Scorpion and various inboard and sterndrive configurations. The alternator features a negative polarity and is built to meet OEM specifications for a seamless replacement. Ensure you verify your engine model and the pulley type to Cross-Reference Part Numbers: 12176S, 893876, AC165610, AC165616, AC165617, M50924, M59207, 805884, 805884P, 807653, LRA02065, 60050HD, 60065, 169CI, 254CI, 377ci, 350ci, 454ci, 12174, 12176