Quicksilver – Complete Upper Driveshaft Housing | Bravo One XR Series | Corrosion-Resistant Alloy | 865440H73

Overview

There is a special kind of confidence that comes from knowing the heart of your Bravo One XR sterndrive is built on a foundation you can trust. When you push the throttles forward and feel the stern lift, you are relying on components deep inside the drive — parts you rarely see, but depend on every time you run. This upper driveshaft housing is one of those pieces. Strong, quiet, and built to take real marine punishment, it's the kind of part that restores the backbone of your drive and gives you the peace of mind to run hard when the water calls for it.

Key Features

• Complete upper driveshaft housing for Bravo One XR drives.
• Fits integrated-transom models (serial number 0W240000 and newer).
• Heavy-duty forged gears for high-load performance.
• XK360 low-copper alloy for superior corrosion resistance.
• Tri-Paint coating for long-lasting durability.
• Mercury Marine part number 865440H73.

Engine & Boat Compatibility

• Designed for MerCruiser Bravo One XR sterndrives.
• Works with integrated-transom models only.
• Ideal for offshore boats, high-performance hulls, stepped-hull designs, and heavy cruisers that demand strong driveline components.
• Suitable for both freshwater and aggressive saltwater environments.

Performance & Practical Benefits

Once installed, the difference in the drive’s behavior is unmistakable. The forged gears provide a tight, positive feel under acceleration — no chatter, no hesitation, just smooth delivery of power. The stronger alloy resists corrosion even when the boat spends long periods in saltwater, giving you the durability needed for high-torque, high-speed running.

The housing feels solid in your hands. The coating is thick and even, forming a barrier that stands up to moisture, grit, and long-term exposure. Inside, the precision machining keeps the driveshaft steady, reducing vibration and helping the entire driveline operate more efficiently.

On the water, you’ll notice cleaner mid-range acceleration, sharper response when trimming, and a more composed feel at higher speeds. For performance-minded boaters, those small improvements stack up into a noticeable, satisfying difference — the kind of improvement that brings new life to a boat you already love.

Why Buy OEM

Upper housings handle huge forces. A non-OEM casting or gear set may look right, but if the tolerance is off by even a hair, wear accelerates and failures become costly.

Mercury Marine parts are built to the exact specifications Bravo XR drives were engineered around. That means perfect alignment, dependable strength, and coatings that truly last. When you’re dealing with the core structure of your sterndrive, OEM isn’t about preference — it’s about protecting your investment.

FAQ

Q1: Which drives does this housing fit?

It fits Bravo One XR sterndrives with integrated transoms (serial number 0W240000 and up).

Q2: What makes it better than aftermarket assemblies?

Stronger alloy, forged gears, superior coating, and perfect alignment.

Q3: How do I know it’s the right replacement?

Check your serial number and drive style. If you have an integrated-transom Bravo One XR, part 865440H73 is correct.

Q4: Can it be used in saltwater?

Absolutely — the XK360 alloy and Tri-Paint finish thrive in harsh environments.

Q5: Is installation straightforward?

It should be handled by experienced mechanics, but OEM fitment ensures predictable setup.