Crusader 12V 120-Amp Alternator | Internally Regulated with

Marine engine with this 12V 120-Amp 10-Si style alternator, perfect for high-output needs. It features a 1" mounting foot, 3-hole adjustable ear, and 3-wire hook-up (red wire for sensor, black for excitation). Replacing older Mercruiser 1983-89 55Amp Motorola alternators, this internally regulated alternator ensures reliable power and is ignition protected to SAE J1171 standards. Ideal for demanding marine environments.