Mercury – Quicksilver 821631T1 Aluminum Gimbal Housing Anode | MerCruiser R, MR, Alpha One Gen II, Bravo, X, XR & XZ Drives | 821631T1

Overview

Your sterndrive lives in one of the toughest environments on your boat — submerged metal, saltwater, and constant current flow. The Mercury 821631T1 Aluminum Gimbal Housing Anode is designed to take the hit so your drive doesn’t. This OEM anode protects your MerCruiser R, MR, Alpha One Gen II, Bravo, X, XR, and XZ drives from galvanic corrosion, extending the life of your gimbal housing and internal components.

Made from high-quality aluminum alloy, it delivers balanced, long-lasting protection in both salt and freshwater. Installation is quick with the included hardware, so you can get back to boating knowing your drive is properly protected.

Key Features

• Purpose: Shields your gimbal housing and sterndrive from galvanic corrosion.
• Fitment: For MerCruiser R, MR, Alpha One Gen II, Bravo series, X, XR, and XZ drives.
• Construction: Made from marine-grade aluminum for reliable protection in fresh or saltwater.
• Installation: Includes hardware for easy replacement with standard tools.
• Maintenance Tip: Inspect regularly and replace when corrosion or pitting becomes visible.

Engine & Boat Compatibility

• MerCruiser R, MR, Alpha One Gen II, Bravo, X, XR, and XZ drives
• Ideal for boats operated in both saltwater and freshwater environments

Performance & Practical Benefits

The 821631T1 anode acts as a sacrificial shield for your sterndrive. It’s designed to corrode gradually, protecting key metal components like the gimbal housing and bearing carrier from electrolysis. The aluminum alloy lasts longer than traditional zinc anodes and performs equally well in salt or fresh water.

Installation takes just a few minutes — remove the worn anode, bolt this one in place using the supplied hardware, and you’re done. Regularly replacing this part ensures long-term protection and helps avoid expensive drive repairs down the line.

Why Buy OEM

Mercury’s OEM anodes are engineered from the right aluminum blend to meet marine protection standards. Aftermarket versions might look the same but often use impure alloys that wear too quickly or unevenly.

A genuine Quicksilver anode guarantees the correct metal composition and a perfect fit for your drive. It’s tested by Mercury to deliver the same corrosion resistance your engine had when it left the factory.

FAQ

Q1: What drives fit the Quicksilver 821631T1 anode?
A: It fits MerCruiser R, MR, Alpha One Gen II, Bravo series, X, XR, and XZ drives.

Q2: Is it safe for saltwater use?
A: Yes. The aluminum alloy is designed to perform in both salt and freshwater.

Q3: Is installation hardware included?
A: Yes, the kit includes mounting hardware for a quick replacement.

Q4: How often should I replace it?
A: Check it regularly and replace once about 50% of the anode has worn away.

Q5: Why choose OEM instead of aftermarket?
A: OEM anodes use the correct aluminum blend and ensure consistent, reliable corrosion protection.