Mercury – Gear Lube Bottle Assembly | Lubrication System | 806193A47

Overview

On Alpha and Bravo drives, that little gear-lube bottle tucked in the engine bay does more work than most people realize. When it cracks, yellows, or starts weeping oil, you lose the only easy way to keep an eye on what’s happening inside the drive. This replacement bottle fits the newer (2002 and up) MerCruiser sterndrives with standard cooling and drops right into the same spot. It’s a simple part, but having a clean, solid reservoir makes it a whole lot easier to spot low fluid or milky oil before things get expensive.

Key Features

 • OEM Replacement Bottle – Built for Alpha and Bravo sterndrives, 2002 and newer.
 • Clear, Durable Housing – Makes checking the oil level quick and honest.
 • Easy Install – Uses basic hand tools; hose and hardware are reused.
 • Bilge-Ready Construction – Holds up to vibration, heat, and the usual marine grime.
 • Correct Venting & Fitment – Matches Mercury’s original design so the drive feeds properly.

Engine & Boat Compatibility

 • MerCruiser Alpha (2002+)
 • MerCruiser Bravo (2002+)
 • Standard-cooling sterndrive systems
 • Gear-lube reservoir setups

Performance & Practical Benefits

A fresh bottle means you can actually see what the gear lube’s doing. One quick look tells you if the level’s dropping, if the oil’s getting milky, or if something’s leaking. A good reservoir also helps the drive vent correctly, which keeps the lube circulating the way it should. For anyone who’s run sterndrives long enough, you know catching a problem early can save you from a very pricey gear set.

Why Buy OEM

OEM bottles line up the way they should and seal properly. Some aftermarket ones don’t vent right or cloud up fast, making it harder to read the oil level. Mercury’s design lasts longer, stays clear, and gives you an accurate look at the drive’s health—exactly what that bottle is supposed to do.

FAQ

Q1: When should I replace the bottle?
A: If it’s cracked, leaking, yellowed, or the level markings are impossible to read.

Q2: Do I need new mounting hardware?
A: Not usually—most boats reuse the same screws and bracket.

Q3: Is the hose included?
A: No, you reuse the existing hose unless it’s damaged.

Q4: Can I swap this out myself?
A: Yes—basic tools and a few minutes are usually all it takes.

Q5: Why does clear plastic matter so much?
A: You can spot bad oil or a low level instantly, instead of learning the hard way out on the water.

• Supersessions
  806193A37, 806193T37, 8M0075710, 8M0075710