Mercury – Upper Driveshaft Housing | Bravo One XR Series | Corrosion-Resistant Marine Alloy | 863836A56

Overview

Every boater knows that the real magic of a good day on the water comes from trust—trust that when you push the throttles forward, your boat responds with smooth, confident power. That’s why having a solid upper driveshaft housing matters so much. You feel it in the way the drive holds steady through tight turns, in the calm rise onto plane, and even in the quiet hum at cruising speed. With this Mercury Marine part beneath your Bravo One XR sterndrive, you’ll know your boat is backed by the same dependable engineering that keeps professional offshore runners and performance hulls running strong year after year.

Key Features

• Complete upper driveshaft housing engineered for Bravo One XR sterndrives
• Cast from XK360 low-copper alloy for superior corrosion resistance
• Tri-Paint anti-corrosion coating for long-term protection in harsh marine conditions
• Built with heavy-duty forged gears for enhanced strength and durability
• Integrated U-joint assembly designed for smooth, consistent power transfer
• Precision-matched to Mercury Marine factory specifications

Engine & Boat Compatibility

• Fits MerCruiser Bravo One XR sterndrives
• Compatible with serial numbers 0M100001 through 0W239999
• Common on high-performance V-hulls, go-fast boats, sport cruisers, heavy recreational stern-drive setups, and tow-sport boats
• Ideal for engines and boats that run higher loads, quicker acceleration, or extended RPM ranges

Performance & Practical Benefits

A strong upper driveshaft housing isn’t just a structural component—it’s the backbone of the entire sterndrive. When this piece is right, everything downstream simply feels better. You’ll notice tighter engagement when shifting, steadier acceleration when climbing onto plane, and a smoother transfer of torque even when pushing through chop.

The XK360 marine alloy makes a real difference in day-to-day reliability. It stands up to saltwater, heat, vibration, and the constant pressure of power delivery far better than weaker aftermarket metals. Paired with the Tri-Paint system, this housing builds a protective shell that helps preserve your investment season after season.

Inside, the forged gears offer strength you can genuinely feel. There’s a steadiness to the drive that shows up in small moments—when you hold a strong turn at speed, when you push past a wake, or when you accelerate with confidence knowing the internals are built to handle real marine stress. Whether you run your boat hard or simply demand dependability, this housing keeps everything feeling tight, aligned, and secure.

Why Buy OEM

When you’re working with high-performance drives like the Bravo One XR, cutting corners simply doesn’t pay off.

• OEM engineering ensures perfect fit and proper alignment
• Marine-tested alloys outperform typical aftermarket materials
• Reduced maintenance and longer part life
• Protects the sterndrive investment by keeping internal components running as designed
• Installation is straightforward because the part is built specifically for your system

If you’re advising a fellow boater at the dock, you’d probably say the same thing: OEM is the safest, smartest route for critical sterndrive components.

FAQ

Q1: Which systems does the Upper Driveshaft Housing 863836A56 fit?

It fits MerCruiser Bravo One XR sterndrives within serial range 0M100001–0W239999.

Q2: What separates this from aftermarket replacements?

The alloy quality, forging process, paint system, and dimensional accuracy far exceed what aftermarket suppliers typically offer.

Q3: How do I confirm this part fits my drive?

Match your sterndrive’s serial number and verify that your unit is a Bravo One XR model.

Q4: Can it be used in both saltwater and freshwater?

Absolutely. The alloy and corrosion-resistant coating are designed for both environments.

Q5: Is installation manageable for most boat owners?

If you’re familiar with sterndrive service or working with a technician, installation is smooth and straightforward.