Yamaha Yamalube ACC-GLUBE-HD-QT Marine Lower Unit Lube

The Yamaha Yamalube ACC-GLUBE-HD-QT Marine Lower Unit Lube is a heavy-duty 80W-90 gearcase lubricant engineered by Yamaha for its own outboard motors. Sold in a convenient two-quart package, it provides enough product for a complete lower unit drain-and-fill on most outboards, with some left over for topping off. The formula is built around robust rust and corrosion inhibitors that protect internal gearcase components — gears, bearings, and seals — from the punishing effects of saltwater exposure and high-speed operation over extended periods.

This lubricant is specifically recommended for Yamaha 4.2L V6, V8, and VMAX SHO 225 and 250 HP outboards, and is generally suitable for Yamaha outboards rated at 250 HP or less. As a genuine OEM product, it meets Yamaha's factory specifications for viscosity, shear stability, and corrosion resistance, making it a straightforward choice for owners who want to keep their maintenance aligned with manufacturer recommendations. Regular lower unit service with the correct lubricant is one of the most important steps in preserving outboard longevity, and Yamalube HD gearcase lube is purpose-built for that job.