Engineered for boaters who demand the best from their outboards and sterndrives, this Sierra Hi-Performance Gear Lube and Pump Kit delivers unmatched protection under extreme conditions. Whether you're pushing your vessel to its limits on the water or tackling heavy towing duties, this synthetic-blended formula steps up where standard lubricants fall short, keeping your lower unit running smoother, cooler, and longer.

Engineered for Extreme Marine Demands

In the harsh world of saltwater boating and high-speed runs, your lower unit faces relentless pressure from heat, friction, and contaminants. This kit tackles those challenges head-on with a premium marine-grade lubricant that clings to metal surfaces, slashing wear on gears, bearings, and shafts. Boaters report noticeably quieter operation and faster response after switching, proving its edge in real-world performance.

Standout Features That Drive Results

• Synthetic Precision Blend: Combines advanced synthetics with marine-specific additives for superior film strength and thermal stability—ideal for sustained high RPMs or overloaded props.
• Friction Fighters: Specialized molecules reduce drag by up to 20% compared to conventional oils, translating to better fuel efficiency and horsepower gains.
• Component Shielding: Protects against pitting, scoring, and corrosion, extending service intervals and minimizing downtime during peak season.
• OEM-Exceeding Standards: Lab-tested to outperform factory fills in shear stability and load-carrying capacity, without the premium price tag.

Complete Kit for Effortless Maintenance

Everything you need arrives in one convenient package—no hunting for tools or mismatched parts. The included quart of high-performance gear lube pairs perfectly with the precision pump and versatile adapters, fitting most popular outboard and I/O setups. This all-in-one approach saves time at the dock or in the garage, letting you focus on what matters: getting back on the water.

Pro Tips for Optimal Gear Lube Performance

To maximize longevity, change your gear lube every 100 hours or annually, whichever comes first, especially after saltwater exposure. Warm the lower unit slightly before draining to ensure complete old oil removal, then pump in the fresh lube until it overflows the vent—signaling a full fill. Pair with regular prop inspections and shaft alignments for a bulletproof drivetrain. Anglers and racers alike swear by this routine for trouble-free seasons.

Why Boaters Trust This Kit for High-Stakes Runs

Unlike everyday gear oils that break down under heat, this formula maintains viscosity across a wide temperature range, from icy mornings to scorching afternoons. It's the go-to for tournament pros, offshore cruisers, and weekend warriors upgrading from stock lubes. Real users highlight its tacky texture that seals out water intrusion, preventing the milky emulsions that plague lesser products.