Mercury - Quicksilver Aluminum Anode Kit Yamaha 300-350 XP Series Cast Aluminum Finish 8M6008000. Overview. There is nothing quite like the peace of mind that comes from knowing your outboard is protected-even when you cannot see what is happening below the surface. When you run powerful engines like the Yamaha 300 or 350 XP series, you want the assurance that every component beneath the waterline is guarded against the elements. Whether you are pushing offshore or easing back toward the dock af