Mercury – Quicksilver SAE 90 High Performance Gear Lube | Marine Lubricant | 8 oz Tube | 802851Q02

Overview

Your lower unit works hard every time you throttle up, and it deserves protection that can keep up. Mercury Marine 802851Q02 Quicksilver SAE 90 High Performance Gear Lube is built for outboards and sterndrives over 75HP, giving gears and bearings the care they need under load. This 8 oz tube delivers a thick, durable film that clings to metal parts, guarding them from heat, corrosion, and wear — even if water finds its way inside. It’s the same high-strength lubricant Mercury relies on at the factory and in their service centers, made for the long haul in tough marine environments.

Key Features

• Purpose: Keeps gears running smoothly and prevents metal-on-metal wear.
• Formula: SAE 90 viscosity gear oil with synthetic pressure additives for maximum strength.
• Protection: Fights corrosion and pitting caused by water or condensation in the gearcase.
• Durability: Stands up to high heat, extreme torque, and constant use.
• Ease of Use: Simple 8 oz squeeze tube makes servicing clean and quick.

Engine & Equipment Compatibility

• For outboard and sterndrive gearcases rated over 75HP
• Ideal for Mercury, Mariner, and MerCruiser engines and high-performance drives

Performance & Real-World Benefits

The 802851Q02 gear lube keeps your engine’s lower unit protected in the harshest conditions. It holds its viscosity even under pressure and won’t break down from heat or high-speed operation. If moisture enters the housing, the oil stays stable — no foaming or emulsifying, just steady lubrication and corrosion resistance.

It’s the kind of protection you notice every time you shift into gear — smoother operation, quieter running, and peace of mind knowing your components are covered from the inside out.

Why Choose Mercury OEM

The Quicksilver 802851Q02 is a true Mercury Marine formulation, designed for marine applications — not repurposed automotive oil. Automotive gear lubes often lose their protective properties in wet conditions, while Mercury’s OEM blend is tested to handle saltwater, high heat, and heavy torque loads without breaking down.

It’s the same gear oil Mercury uses when building and servicing engines at the factory. Choosing OEM means you’re getting tested, proven protection designed by the people who built your motor.

FAQ

Q1: What engines is this gear lube best for?
It’s made for outboards and sterndrives above 75 horsepower, including Mercury, Mariner, and MerCruiser models.

Q2: What makes this lube “high performance”?
It’s formulated with synthetic pressure additives that maintain strength and prevent wear under heavy loads.

Q3: Can it handle water exposure?
Yes — it contains corrosion inhibitors that keep gears protected even if a small amount of water enters the gearcase.

Q4: How much product is in a tube?
Each tube holds 8 ounces, the right amount for small fill jobs or top-offs.

Q5: Why OEM instead of aftermarket?
Because Mercury’s OEM oil is built for real boating conditions — stable under heat, protective against saltwater, and tested to outlast generic gear lubes.