Mercury - Alternator 55 Amp Charging System Marine-Grade Aluminum Build 8M6007472. Overview. On the water, reliability is everything. When you turn the key on your Honda outboard, you want the engine to leap to life with the same steady confidence you feel as you ease out of the marina. The Quicksilver 8M6007472 Alternator delivers that peace of mind every time, keeping your electrical system strong and your boat ready for whatever the day brings-long trolling runs, electronics-heavy setups, or