Yamaha - Fuel Pump Assembly Fuel Delivery System 68V-13907-04-00. Overview. When a Yamaha outboard starts struggling under load or hesitates when you throttle up, the fuel pump is often one of the first things to check. The Yamaha Fuel Pump Assembly 68V-13907-04-00 is designed to keep fuel moving consistently from the tank to the engine so the motor can perform the way it should. Over time, internal diaphragms and valves can wear out, especially with today's ethanol-blended fuels. Replacing the