Mercury - Quicksilver 65-Amp Alternator For GM V6 & V8 EFI Engines (1996-1999) 807653T. Overview. A strong charging system is the heartbeat of your boat's electrical performance. The Mercury Marine 807653T Quicksilver 65-Amp Alternator is designed to keep your GM-built V6 and V8 EFI MerCruiser engines (305, 350, 377, 454, and 502 CID, model years 1996-1999) running smoothly. Built to handle marine conditions, this alternator delivers dependable charging power for your engine, batteries, and onbo