Yamaha - Gear Pump Assembly Engine Lubrication Component 6C5-43830-10-00. Overview. When it comes to engine life, oil flow is everything, and this gear pump is what keeps it moving. It pushes oil through the system under pressure so internal parts stay lubricated and protected. When one starts to weaken, you'll notice it in noise, heat, or warning signs that something's not right. I've seen engines saved-and lost-based on whether this part was doing its job.. Key Features. • Consistent Oil Pressure - Maintains steady lubrication throughout the engine.. • Precision Gear Operation - Uses internal gears to deliver reliable oil flow under load.. • OEM Fit Accuracy - Matches Yamaha factory specs for proper installation and function.. • Heavy Duty Construction - Built to handle heat, pressure, and continuous operation.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha outboard model and part number before installation.. FAQs. Q1: What are signs this gear pump is fa