Mercury – MerCruiser Bravo One 300 Hour Maintenance Kit | Precision Sterndrive Service Kit | Marine-Ready Components | 8M0147074

Overview

Anyone who runs a Bravo One sterndrive knows the feeling — that unmistakable push when you roll into the throttle, the steady grip when the hull settles in and the confidence that comes from a drive built to handle real power. Over the years, these drives earn a kind of respect. They’re strong, loyal and capable, but only if you keep them cared for. The Mercury Marine part number 8M0147074 300-hour maintenance kit brings that care back into focus, giving you everything you need to keep a Bravo One performing like the workhorse it’s meant to be.

Key Features

• Complete 300-hour maintenance kit for MerCruiser Bravo One sterndrives (1988–2016)
• Includes sterndrive install gasket kit, aluminum anode kit, gearcase drain seals, transom repair kit, shift cable kit and gearcase fill and drain screws
• Durable components built for long-term marine use
• Corrosion-resistant aluminum anodes provide essential protection for the drive
• Gaskets, seals and hardware designed for a tight, precise fit

Engine & Boat Compatibility

• Fits MerCruiser Bravo One sterndrives from 1988 through 2016
• Common on performance boats, cruisers, offshore fishing vessels, wake boats and sport models
• Ideal for owners who run high-output setups or frequently navigate demanding conditions

Performance & Practical Benefits

A Bravo One is built to take a beating, but regular maintenance is what keeps it feeling smooth, solid and predictable. This kit brings together the parts that make the biggest difference in how the drive performs. Fresh gaskets restore a tight seal throughout the system. New gearcase drain seals prevent unwanted leaks. And updated anodes offer lasting corrosion protection — especially important if your runs take you through saltwater or rough brackish areas.

The shift cable kit alone can transform how the boat feels at the dock. You’ll notice cleaner engagement, less hesitation and a more confident transition into forward or reverse. The gasket kit sits exactly how it should, the hardware threads in cleanly and the new components create a renewed sense of stability once everything is back together. After completing the service, most boaters notice quieter operation, steadier thrust and more predictable handling at mid-range and top-end speeds. It’s the kind of difference you can feel in the wheel, in the throttle and even in the way the boat settles when you come off plane.

Why Buy OEM

There’s a reason so many boaters stick with genuine Mercury Marine parts, especially for major sterndrive service. OEM components are engineered with the exact tolerances, materials and fitment your Bravo One was built around. That means less time adjusting, fewer installation headaches and longer life from every part you replace. Aftermarket kits often miss the mark — wrong fit, weak metals or adhesives that don’t hold up. An OEM kit simply does the job right the first time. If a fellow boater asked for honest advice, you’d probably say the same thing: use the parts Mercury designed for your drive, and the rest of the season will thank you.

FAQ

Q1: Which systems does the 8M0147074 maintenance kit fit?

It fits MerCruiser Bravo One sterndrives manufactured from 1988 to 2016.

Q2: Why choose this OEM kit over aftermarket alternatives?

The fitment is exact, the materials are stronger and the components last longer under real-world marine conditions.

Q3: How can I be sure this is the correct kit for my setup?

If your boat uses a Bravo One drive within the 1988–2016 range, this Mercury Marine part number is the correct 300-hour service kit.

Q4: Is it suitable for freshwater and saltwater applications?

Yes — the included aluminum anodes and marine-grade components are built for both environments.

Q5: Is installation straightforward?

For most boat owners familiar with sterndrive service, the installation is clean, predictable and hassle-free thanks to the precise OEM fit.