Plews Lower Unit Gear Lube High-Viscosity 1 Quart for Marine Gears & Bearings Protection

Plews LubriMatic 11552 is a high-viscosity lower unit gear lube sold in a 1-quart bottle, formulated to protect marine lower gears and bearings under heavy load and harsh water conditions.

Designed for outboard and stern drive lower units, this 1-quart LubriMatic 11552 product provides a thicker, more robust film than standard gear oils to help reduce wear, resist shearing, and maintain lubrication where water intrusion and heavy torque are common. The quart size suits routine service intervals for many personal watercraft and small-to-medium boats, and the thicker viscosity helps retain a protective layer on gears operating at high pressures.

What does this high-viscosity gear lube do for my lower unit?

This lubricant creates a resilient lubricating film that helps minimize metal-to-metal contact in gearsets and bearings. It is engineered to cope with the pressure, shock loads, and possible water contamination typical of marine lower units without thinning out quickly.

• Provides heavier film strength for high-load gear teeth and bearings
• Helps resist washout in wet environments
• Reduces wear and extends service intervals when used per manufacturer guidance

How much is in the bottle and how often should I service my unit?

This item comes as a single 1-quart container, sized for common lower-unit refill and top-up needs on many outboards and stern drives. Service frequency depends on your engine maker's recommendations, operating hours, and exposure to harsh conditions such as saltwater or heavy towing.

• 1-quart bottle suitable for many lower unit refill jobs
• Follow engine or gearbox manufacturer service intervals for best results
• Inspect gear oil for contamination after heavy or saltwater use

Is this compatible with my marine gearbox and seals?

Plews LubriMatic 11552 is formulated for lower unit applications where a higher-viscosity lubricant is specified. Always confirm compatibility with your engine maker or owner manual, because some gearboxes require specific oil types or additives to protect seals and synchronizers.

• Intended for lower-unit gearboxes that call for high-viscosity lubes
• Check your owner manual for recommended oil grades and approvals
• Perform a visual seal check after installation and during routine maintenance

How should I store and handle this quart of lubricant?

Store the bottle upright in a cool, dry place away from direct sunlight and heat sources to preserve viscosity and packaging integrity. Use clean tools when filling to avoid introducing contaminants and dispose of used oil according to local environmental regulations.

• Keep in original sealed container when not in use
• Avoid contamination—use a clean pump or funnel for filling
• Recycle or dispose of used lubricant at approved collection centers

Who is this for: Plews LubriMatic 11552 High Viscosity Lower Unit Gear Lube in a 1-quart size is aimed at boat owners, marina technicians, and service shops that work on outboards and sterndrive lower units requiring a thicker gear lubricant. It’s a practical choice for operators who encounter heavy loads, regular towing, or frequent saltwater exposure and need a reliable quart-sized supply for routine maintenance and gear protection.