Yamaha - Fuel Cock Assembly 1 Fuel System Control Component 6BX-24500-01-00. Overview. When you're dealing with fuel flow issues or storage concerns, the fuel cock is one of those parts that really matters. It controls when and how fuel moves from the tank into the system, and if it's not working right, you'll notice it pretty quickly. I've seen engines struggle to start or run inconsistently just from a faulty valve. A solid fuel cock keeps things simple-open when you need it, sealed when you don't.. Key Features. • Fuel Flow Control - Allows manual control of fuel supply to the engine.. • Leak Prevention Design - Helps ensure a tight shutoff to prevent fuel loss.. • OEM Fit Accuracy - Matches Yamaha factory specs for proper installation and operation.. • Durable Fuel Resistant Build - Designed to handle fuel exposure and marine conditions.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha outboard model and part number before installation.. FAQs. Q1: What a