Mercury – Quicksilver Anode | Corrosion Protection for 25–50HP Outboards | 804043

Overview

Salt, moisture, and time can eat away at metal, and that’s where the Mercury Marine 804043 Quicksilver Anode earns its keep. This small piece of metal quietly does an important job — it takes on corrosion so your engine doesn’t have to. Built for Mercury 25–50HP 2-Stroke Jet, International, and Lightning outboards (2006 and newer), and 25–30HP 4-Stroke EFI 3-cylinder outboards (2022 and newer), it’s designed to handle the harsh reality of life in the water. Whether you fish salt flats or cruise in freshwater, it keeps critical parts like your lower unit and prop protected from corrosion.

Key Features

• Purpose: Shields your outboard’s metal components from galvanic corrosion.
• Material: Made from marine-grade alloy that’s optimized for long-term protection.
• Design: Precision-molded for a perfect OEM fit and easy installation.
• Performance: Draws corrosion away from vital parts like the lower unit and prop shaft.
• Durability: Performs reliably in both fresh and saltwater environments.

Engine & Boat Compatibility

• Mercury 25–50HP 2-Stroke Jet, International, and Lightning outboards (2006 & newer)
• Mercury 25–30HP 4-Stroke EFI 3-cylinder outboards (2022 & newer)

Performance & Real-World Benefits

The 804043 Quicksilver Anode is one of those small, inexpensive parts that makes a huge difference over time. As your engine runs in water, electrical currents naturally cause corrosion on exposed metal. This anode is built to corrode first — taking the damage so the rest of your engine stays intact.

You’ll notice the difference during maintenance: clean housings, fewer corrosion spots, and longer-lasting hardware. It’s a simple, smart way to protect your investment and keep your engine performing season after season.

Why Choose Mercury OEM

Mercury doesn’t cut corners when it comes to protection. The Quicksilver 804043 is a factory-tested anode, made from the same alloy blend Mercury installs on brand-new outboards. Many generic anodes use cheaper materials that wear unevenly or too quickly, leaving your engine exposed.

Mercury’s OEM composition is balanced for reliable protection in all water types — salt, brackish, or fresh. It’s the same level of quality trusted by Mercury technicians and boaters who depend on their engines to start strong every time.

FAQ

Q1: What does this part do?
It absorbs corrosion, keeping your outboard’s aluminum and steel parts safe.

Q2: How do I know when to replace it?
Inspect it regularly and replace it when roughly half of the metal has worn away.

Q3: Does it fit my engine?
Yes, it’s made for Mercury 25–50HP 2-Stroke (2006+) and 25–30HP 4-Stroke EFI (2022+) models.

Q4: Can I install it myself?
Absolutely — it’s a quick, direct fit using simple tools.

Q5: Why use OEM anodes?
Because Mercury’s alloy mix is engineered for steady, even corrosion control — no surprises, just lasting protection.