Mercury – Quicksilver 821629T1 Aluminum Drive Shaft Housing Anode | MerCruiser Alpha One Gen II Sterndrives | 821629T1

Overview

Corrosion can quietly wear down your drive long before you notice it. The Mercury 821629T1 Aluminum Drive Shaft Housing Anode protects your MerCruiser Alpha One Gen II sterndrive from galvanic corrosion in both fresh and saltwater. It’s a small, easy-to-replace part that saves you from expensive repairs down the road.

This OEM anode is made from marine-grade aluminum that sacrifices itself to shield your drive’s housing and hardware from corrosion. It’s built to fit perfectly and perform reliably in all conditions — a simple upgrade that keeps your drive looking and running like new.

Key Features

• Purpose: Protects your MerCruiser sterndrive housing from galvanic corrosion.
• Fitment: For MerCruiser Alpha One Gen II sterndrives.
• Construction: Cast from high-quality aluminum alloy for dependable corrosion resistance in all water types.
• Performance: Works effectively in both freshwater and saltwater.
• Maintenance: Easy to inspect and replace when signs of wear or pitting appear.

Engine & Boat Compatibility

• MerCruiser Alpha One Gen II sterndrives
• Ideal for runabouts, pontoons, cruisers, and fishing boats powered by MerCruiser engines

Performance & Practical Benefits

The 821629T1 anode works as a sacrificial shield, corroding slowly over time to protect your drive’s aluminum components from electrolysis. It’s designed to provide balanced, even wear that prevents hidden damage to the gearcase or driveshaft housing.

Replacing it is fast — unbolt the old anode, attach the new one, and you’re done. Keeping it fresh is one of the easiest, most affordable ways to maintain your sterndrive’s performance and prevent long-term corrosion damage.

Why Buy OEM

Mercury’s OEM anodes are engineered with the right aluminum blend for proper protection and longevity. Aftermarket versions can wear unevenly or too quickly, leaving key areas exposed.

A genuine Quicksilver anode ensures the right fit, even wear, and consistent corrosion defense — the same quality Mercury builds into every drive.

FAQ

Q1: What drives fit the Quicksilver 821629T1 anode?
A: It’s made for MerCruiser Alpha One Gen II sterndrives.

Q2: Can I use it in saltwater?
A: Yes. It’s built from aluminum alloy that performs well in both fresh and saltwater.

Q3: How often should I replace it?
A: Inspect it every few months and replace it once it’s about half worn or visibly pitted.

Q4: Is installation difficult?
A: No. It installs easily using standard tools and your existing mounting hardware.

Q5: Why OEM instead of aftermarket?
A: OEM anodes use the correct alloy mix for balanced corrosion protection and longer life.