Sierra Marine 18-5966-1: Sierra Marine Alternators

Sierra Marine 18-5966-1: Marine Alternator, 55 Amp, 12V, Internal Regulator, V-Belt, Black, Mercruiser, Each - Sierra Marine alternators are designed to OEM specifications. All models meet or exceed USCG and SAE J1171 safety requirements and are 100 percent load-tested for assured reliability. Order the replacement alternator recommended for your watercraft application.