90790-BS811 Yamaha GL5 Gear Case Lube 750ml | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamalube SAE 90 GL-5 Gearcase Lubricant - Part Number: 90790-BS811

Genuine Yamalube high-performance lower-unit gear oil formulated for heavily loaded Yamaha outboard gearcases.

The SAE 90 GL-5 lubricant contains extreme-pressure, anti-corrosion, oxidation-control and anti-foaming additives for high-output V6 and V8 lower units.

⚙️ Key Features

• Genuine Yamalube OEM gearcase lubricant
• Correct Yamaha part number 90790-BS811
• SAE 90 viscosity grade
• API GL-5 extreme-pressure performance
• Supplied in a 750ml squeeze bottle

🚤 Compatibility

Commonly used on

• Yamaha high-output V6 and V8 lower units
• Offshore, VMAX SHO and high-performance gearcases

Typically suits

• Engine models:
• Yamaha V6 and V8 outboards approximately 200HP to 350HP
• Yamaha F200, F225 and F250 high-output gearcases
• Yamaha F300 and F350 V8 applications where GL-5 SAE 90 is specified
• Yamaha VF200 and VF250 VMAX SHO
• Yamaha 4.2L V6 Offshore engines from approximately 2010 onward
• Conventional and counter-rotation lower units requiring Yamaha GL-5 lubricant
• Product Type: SAE 90 API GL-5 marine gear oil
• Container Size: 750ml
• Application: High-load Yamaha outboard gearcases.

🔌 Function

The lubricant protects gears, bearings and shafts under high tooth pressure while resisting water contamination, oxidation, corrosion and foaming.

⚠️ Common Signs of Failure

• Oil appears milky or water-contaminated
• Metal particles are present
• Gearcase becomes noisy
• Lubricant is dark or burnt
• Service interval has been reached

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 90790-BS811 current Yamaha 750ml GL-5 gear-lube package reference

OEM / Related Numbers

• 90790-BS811
• Yamalube GL-5 gearcase lubricant
• Yamalube SAE 90 lower-unit oil
• 750ml squeeze bottle

Aftermarket / Verified Equivalents

• Marine SAE 90 GL-5 gear lubricant approved for the applicable Yamaha gearcase
• Quicksilver High Performance Gear Lube where an equivalent marine GL-5 lubricant is permitted
• Sierra high-performance marine gear lubricant

📦 Condition

• Genuine Yamaha product
• Brand new
• Supplied in original packaging