Mercury - Quicksilver 817119A4 55 Amp Alternator (Mando) V-Belt GM-Based MerCruiser 4-Cylinder, V6 & V8 Engines (1982-2016) 817119A4. Overview. A weak alternator can leave you with dim lights, low voltage, or worse - a dead battery at the dock. The Quicksilver 817119A4 55 Amp Alternator is a direct OEM replacement for 4-cylinder MerCruiser sterndrive and inboard engines built by General Motors (1982-2016), as well as select V6 and V8 models (1982-1996).. This Mando-style alternator delivers stea