Mercury – Quicksilver 821630Q1 Aluminum Drive Shaft Housing Anode | MerCruiser Bravo I, II, III, X, XR & XZ Drives | 821630Q1

Overview

Corrosion never takes a break, but the Quicksilver 821630Q1 Aluminum Drive Shaft Housing Anode keeps your MerCruiser Bravo sterndrive one step ahead of it. Cast from high-quality aluminum, this OEM anode is built to protect your drive and engine from the harmful effects of galvanic corrosion — in both saltwater and freshwater.

It installs at the bottom of your drive’s shaft housing, where corrosion hits hardest. With a large surface area for maximum protection and stainless-steel hardware included, it’s a quick and easy upgrade that guards your investment all season long.

Key Features

• Purpose: Shields your Bravo drive and engine from galvanic corrosion.
• Fitment: Fits MerCruiser Bravo I, Bravo II, Bravo III, X, XR, and XZ drives.
• Construction: Cast aluminum body provides long-lasting protection in salt and freshwater.
• Design Advantage: Larger surface area for better, more efficient corrosion defense.
• Ease of Install: Comes with stainless-steel mounting hardware for quick installation.

Engine & Boat Compatibility

• MerCruiser Bravo I, II, III, X, XR, and XZ sterndrives
• Works across a range of sport boats, cruisers, and fishing vessels

Performance & Practical Benefits

The 821630Q1 anode acts as a sacrificial barrier, drawing corrosion away from your sterndrive’s aluminum components. The large surface area offers stronger, more even protection, helping to preserve the drive’s finish and structure.

Replacing your anodes regularly is the best way to prevent costly corrosion-related damage. Installation takes only a few minutes — unbolt the old one, attach the new anode with the provided stainless hardware, and your drive is fully protected again.

Why Buy OEM

Mercury’s OEM anodes are engineered with the correct aluminum alloy blend for optimal protection in marine environments. Aftermarket versions often use inconsistent materials that corrode too quickly or unevenly.

A genuine Quicksilver anode guarantees precise fit, even wear, and dependable, long-term protection for your MerCruiser drive and engine.

FAQ

Q1: What drives fit the Quicksilver 821630Q1 anode?
A: It fits MerCruiser Bravo I, II, III, X, XR, and XZ sterndrives.

Q2: Can it be used in saltwater?
A: Yes. This aluminum alloy is effective in both saltwater and freshwater.

Q3: Is hardware included?
A: Yes. It comes with stainless-steel attaching hardware for fast and secure installation.

Q4: How often should I replace it?
A: Inspect your anodes every few months and replace them when about half of the metal has worn away.

Q5: Why OEM instead of aftermarket?
A: OEM anodes ensure proper alloy balance, even corrosion protection, and a perfect fit — something aftermarket parts rarely match.