Yamaha - Gear Pump Assembly Engine Lubrication System 6AW-43830-00-00. Overview. Oil pressure is one of those things you don't get a second chance with. When the pump is doing its job, everything inside the engine stays protected and running smooth without a second thought. But once pressure drops, things can go downhill fast. This Yamaha gear pump assembly is built to keep oil moving consistently, even under heavy load and long runs.. Key Features. Consistent Oil Flow - Maintains steady lubrication to protect internal engine components.. Gear-Driven Reliability - Uses a durable gear design for dependable oil circulation under load.. OEM Pressure Performance - Built to Yamaha specifications for proper oil pressure delivery.. Service-Ready Assembly - Comes as a complete unit for straightforward replacement.. Engine & Boat Compatibility. Designed for Yamaha outboard engines requiring a gear-driven oil pump system. Commonly used in modern Yamaha applications where consistent lubrication i