What gear oil for mercury outboard?

Continued use of this gear case lubricant will: Provide maximum protection against excessive wear - even in the presence of water Prevent corrosion and pitting Help extend gear life Mercury Premium SAE 80W90 Gear Lube is recommended for lower units for outboards below 75 horsepower. Mercury Premium SAE 80W90 Gear Lube should not be mixed with Mercury High-Performance SAE 90 Gear Lube. read more

Insert nozzle of a tube of AMSOIL Synthetic Marine Gear Lubricant, Mercury's proprietary gear oil into the lower unit drain hole. Squeeze the lubricant up into into the lower unit, from the bottom of the tube. You may need more than one tube of gear oil. read more