Yamaha - Body, throttle 1 - 68V-13751-20-00Yamaha Throttle Body 1 Intake System Component 68V 13751 20 00 Overview The throttle body is a key component of your Yamaha outboards intake system, responsible for controlling the amount of air entering the engine during operation. By regulating airflow based on throttle input, it plays a critical role in maintaining proper air to fuel balance for efficient combustion. A worn or malfunctioning throttle body can lead to rough idle, hesitation, or