Yamaha - Fuel Cock Assembly 1 Fuel System 6E0-24500-10-00. Overview. Fuel delivery starts here, and when this part isn't working right, everything downstream feels it. The fuel cock controls the flow from the tank, and I've seen engines struggle or stall just because this valve wasn't opening or sealing properly. It's one of those components that needs to work smoothly every time you run the motor. Replacing it brings back steady, reliable fuel control you can trust on the water.. Key Features. Controlled Fuel Shutoff - Regulates fuel flow from the tank for safe and reliable operation.. Smooth Valve Operation - Allows easy switching between flow positions without sticking.. Leak-Resistant Design - Helps prevent fuel seepage and maintains a sealed system.. OEM Fitment Accuracy - Matches original specifications for proper installation and function.. Engine & Boat Compatibility. Designed for Yamaha 2-stroke outboard engines with manual fuel control systems. Commonly used on smaller horsep