Mercury – Bravo Three 300-Hour Maintenance Kit | MerCruiser Sterndrive Service | Complete Marine Components | 8M0215917

Overview

Anyone who’s spent enough time on the water knows that a smooth-running sterndrive isn’t an accident. It’s the result of steady, thoughtful maintenance—the kind that gives you peace of mind when you throttle up, trim out, and settle into a long run. This Mercury Marine part brings that reassurance back to your Bravo Three. Everything you need for a proper 300-hour service sits in one box, ready to go. No hunting for seals, no guessing which gasket matches, just a kit designed to keep your boat performing the way it should season after season.

Key Features

• Complete 300-hour maintenance kit for MerCruiser Bravo Three sterndrives (2017 and newer).
• Includes sterndrive install gasket kit, aluminum anode kit, gearcase drain seals, transom repair kit, shift cable kit, and gearcase fill and drain screws.
• Premium-quality components designed to protect, seal, and maintain essential drive systems.
• High-performance filters with dense pleat counts for improved filtration.
• Heavy-duty housings engineered to resist corrosion and harsh marine exposure.
• Genuine Mercury Marine part number 8M0215917 for exact fit and service reliability.

Engine & Boat Compatibility

• Fits MerCruiser Bravo Three sterndrives (2017 and newer).
• Compatible with a wide range of MerCruiser gasoline engines paired with Bravo Three drives.
• Common on cruisers, sport boats, bowriders, offshore fishing boats, and family day boats.
• Ideal for annual maintenance or reaching the 300-hour service interval.

Performance & Practical Benefits

This kit helps your Bravo Three feel solid, steady, and predictable again. Every component works together to keep the drive sealed tight and shifting smoothly. Fresh anodes protect against corrosion, especially in brackish or saltwater environments. New gaskets and drain seals help keep water out of places it doesn’t belong, giving you the confidence to run farther without worrying about leaks or gearcase wear.

You’ll feel the difference on the water. Gear engagement becomes cleaner, the drive stays quiet, and throttle transitions feel smooth instead of hesitant. The shift cable kit restores crisp, confident shifting, while the repair and gasket components help the whole system stay secure. With everything replaced at once, the drive just feels “right” again—tight, clean, and ready for another season.

The convenience of having every required part in one kit can’t be overstated. No mismatched pieces. No returning to the store because one gasket didn’t fit. This is the kind of maintenance that saves time and avoids headaches, especially for boaters who like to stay ahead of problems instead of chasing them.

Why Buy OEM

When it comes to something as critical as sterndrive service, aftermarket shortcuts rarely end well. A Bravo Three needs precise parts that fit correctly and stand up to real marine abuse. Mercury’s OEM components are engineered for your exact drive—no compromises. They last longer, seal better, and protect your investment far more effectively than generic alternatives. If you’re a boater who values reliability, buying OEM is simply the smarter choice.

FAQ

Q1: Which systems does this maintenance kit fit?

It fits MerCruiser Bravo Three sterndrives manufactured in 2017 or later.

Q2: What makes this kit better than aftermarket versions?

Every part matches Mercury’s specifications for fit and durability, ensuring long-term protection and proper operation.

Q3: How do I confirm this is the correct kit for my setup?

If your Bravo Three drive is at or approaching 300 hours—or in its yearly maintenance window—this is the correct Mercury Marine part number.

Q4: Can this kit be used for both freshwater and saltwater boating?

Yes. The aluminum anodes and corrosion-resistant components are engineered for both environments.

Q5: Is installation manageable for most boat owners?

If you’re comfortable with sterndrive maintenance, yes. Otherwise, most technicians appreciate the convenience of having all parts in one kit.