1L Bottle of Yamalube SAE-90 GL5 for outboard motors from 150HP and up (use GL4 for 2-150hp)
Yamaha's Yamalube GL-5 Gear Oil provides heavy-duty protection for marine outboard lower units and select power sports final drives. Its primary benefits include extreme-pressure wear resistance, superior rust and corrosion defense in wet environments, foam control, and stable viscosity under high loads.
Protection and PerformanceExtreme Pressure Shielding: High load-carrying capacity prevents metal-to-metal contact during rapid shock loads.
Marine Rust Defense: Fights rust and chemical breakdown caused by water exposure and damp environments.
Foam Control: Prevents air bubbles from forming in the gear case, ensuring a continuous protective oil film on gear teeth.
Thermal Stability: Resists high-temperature breakdown and oxidation to keep seals and internal housing clean.