The ARCO 20825 Alternator fits Indmar, Pleasurecraft, Crusader, and other 12 Volt, 70 Amp applications. Internal fan, 2" mounting foot, single-groove serpentine pulley included. It replaces the following part numbers: Delco 19020608, Pleasurecraft RA097007B, and Sierra 18-6288. All alternators are engineered for performance and reliability. All alternators are engineered and manufactured with precision and quality. All alternators must meet or exceed OEM performance before being boxed.