Description

Mercury 8M0222063 is a genuine OEM SAE 90 High Performance Gear Lube for marine gearcases. It is formulated for outboard lower units, jet pumps, sport jets, and MerCruiser sterndrives, with corrosion and wear protection designed to perform even when water enters the gear housing. Dealer listings identify this part number as the 1 quart / 32 fl oz bottle.

Key Features

• Genuine Mercury Marine / Quicksilver OEM gear lube
• Part number 8M0222063
• SAE 90 High Performance Gear Lube
• 1 quart / 32 fl oz / 946 mL bottle
• Formulated to help protect against wear, pitting, corrosion, and water intrusion-related failure in marine gear housings.

Engine Compatibility
This lube is recommended for Mercury/Mariner outboards 75 HP and above and for all MerCruiser sterndrives. Mercury also states it is suitable for outboard gearcases / lower units, jet pumps, and sport jets in the appropriate applications.

Serial Number Fitment Notice
Please confirm the correct lubricant specification by your exact engine or drive model and serial number before purchase. Gear lube selection matters most when comparing standard applications against specialized or racing gearcase requirements.

When This Part Needs Replacement
Replace gear lube during regular lower-unit or sterndrive service intervals, or anytime the gearcase has been opened, contaminated, or exposed to water intrusion. Fresh marine gear lube helps protect internal gears and bearings under load and temperature. This is a practical service inference supported by Mercury’s focus on corrosion, wear, and water-entry protection.

Installation Notes
Use this lube only in applications calling for SAE 90 high-performance marine gear lube. Mercury also references using a gear lube pump for cleaner filling service on compatible drain/fill screw setups.

Alternate / Superseded Part Numbers

• Earlier Mercury reference: 858064K01
• Older packaged reference: 802854A1 was superseded to 8M0222063 in dealer listings.

Parts Desk Insight
Marine gear lube is one of those products where the right formula matters. Mercury’s high-performance SAE 90 is built specifically for marine gear housings, where water intrusion, corrosion, and sustained load are much bigger concerns than they are with automotive gear oil.

Shipping: Ships same or next day for fast Canada wide shipping.