Yamaha - Fuel Cock Assembly 1 Fuel Shutoff Component 7FK-24500-03-00. Overview. A good fuel cock is one of those simple parts you rely on more than you think. Whether you're shutting fuel off for storage or troubleshooting a fuel issue, it needs to work clean and without hesitation. I've seen sticky or leaking valves cause more problems than expected, especially when engines sit for a while. Having a solid, smooth-operating assembly here just makes everything easier when you're managing your fuel system.. Key Features. • Positive Fuel Shutoff Control - Allows you to cleanly stop or allow fuel flow when needed.• Smooth Valve Operation - Designed for easy switching without sticking or binding.• Integrated Assembly Design - Comes as a complete unit for straightforward replacement.• Leak-Resistant Sealing - Helps prevent fuel seepage around the valve and connections.. Engine & Boat Compatibility. Designed for Yamaha outboard engines that utilize a manual fuel shutoff valve within the fuel