High-Viscosity 80W-90 Lower Unit Gear Lube, Quart

High-Viscosity 80W-90 Lower Unit Gear Lube (1 Quart)

Keep your marine engine running as smooth as the glass on a sunrise lake. Engineered for the high-pressure environment of outboard and stern-drive lower units, our 80W-90 Gear Lube provides the ultimate defense against friction, heat, and the harsh realities of the water.

Why It’s a Must-Have for Your Boat

Marine engines face unique challenges—mainly constant exposure to water and heavy loads. This high-viscosity formula is specifically designed to stay "sticky," ensuring gears remain coated even under extreme stress.

• Superior Lubrication: Formulated with high-quality base oils to reduce wear on gears and bearings.

• Water Emulsification Pro: Contains advanced additives that maintain lubrication integrity even if a small amount of water enters the gearcase.

• Rust & Corrosion Shield: Specifically designed for marine environments to prevent pitting and oxidation during long-term storage or heavy use.

• Extreme Pressure (EP) Performance: Handles the high-torque demands of modern high-horsepower engines without breaking down.

Technical Specifications

Application Tips

Pro Tip: Always change your lower unit lube at the end of the season. If you see "milky" oil during the drain, it’s a sign of a failing seal that needs attention before the next launch!

• Step 1: Position the motor vertically.

• Step 2: Remove the bottom drain screw and top vent screw.

• Step 3: Fill from the bottom hole until the fluid reaches the top vent to ensure no air pockets are trapped.

• Step 4: Secure the top vent screw first to create a vacuum, then the bottom drain screw.

Don't let gear friction cut your weekend short. Protect your investment with the lube that’s built for the deep.